CA1196606A - Closure cap of plastics material - Google Patents
Closure cap of plastics materialInfo
- Publication number
- CA1196606A CA1196606A CA000412738A CA412738A CA1196606A CA 1196606 A CA1196606 A CA 1196606A CA 000412738 A CA000412738 A CA 000412738A CA 412738 A CA412738 A CA 412738A CA 1196606 A CA1196606 A CA 1196606A
- Authority
- CA
- Canada
- Prior art keywords
- cap
- sealing lip
- sealing
- mouth
- container
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 239000000463 material Substances 0.000 title claims abstract description 13
- 239000004033 plastic Substances 0.000 title claims abstract description 8
- 229920003023 plastic Polymers 0.000 title claims abstract description 8
- 238000007789 sealing Methods 0.000 claims abstract description 179
- 230000007935 neutral effect Effects 0.000 claims description 12
- 230000002093 peripheral effect Effects 0.000 claims description 4
- 150000002500 ions Chemical class 0.000 description 7
- 238000005452 bending Methods 0.000 description 4
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- BHMLFPOTZYRDKA-IRXDYDNUSA-N (2s)-2-[(s)-(2-iodophenoxy)-phenylmethyl]morpholine Chemical compound IC1=CC=CC=C1O[C@@H](C=1C=CC=CC=1)[C@H]1OCCNC1 BHMLFPOTZYRDKA-IRXDYDNUSA-N 0.000 description 2
- -1 polyethylene Polymers 0.000 description 2
- 101100313164 Caenorhabditis elegans sea-1 gene Proteins 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 230000009528 severe injury Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D41/00—Caps, e.g. crown caps or crown seals, i.e. members having parts arranged for engagement with the external periphery of a neck or wall defining a pouring opening or discharge aperture; Protective cap-like covers for closure members, e.g. decorative covers of metal foil or paper
- B65D41/32—Caps or cap-like covers with lines of weakness, tearing-strips, tags, or like opening or removal devices, e.g. to facilitate formation of pouring openings
- B65D41/34—Threaded or like caps or cap-like covers provided with tamper elements formed in, or attached to, the closure skirt
- B65D41/3461—Threaded or like caps or cap-like covers provided with tamper elements formed in, or attached to, the closure skirt the tamper element being retracted by heat or by heat and pressure
- B65D41/3466—Threaded or like caps or cap-like covers provided with tamper elements formed in, or attached to, the closure skirt the tamper element being retracted by heat or by heat and pressure and being integrally connected to the closure by means of bridges
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D41/00—Caps, e.g. crown caps or crown seals, i.e. members having parts arranged for engagement with the external periphery of a neck or wall defining a pouring opening or discharge aperture; Protective cap-like covers for closure members, e.g. decorative covers of metal foil or paper
- B65D41/02—Caps or cap-like covers without lines of weakness, tearing strips, tags, or like opening or removal devices
- B65D41/04—Threaded or like caps or cap-like covers secured by rotation
- B65D41/0407—Threaded or like caps or cap-like covers secured by rotation with integral sealing means
- B65D41/0414—Threaded or like caps or cap-like covers secured by rotation with integral sealing means formed by a plug, collar, flange, rib or the like contacting the internal surface of a container neck
- B65D41/0421—Threaded or like caps or cap-like covers secured by rotation with integral sealing means formed by a plug, collar, flange, rib or the like contacting the internal surface of a container neck and combined with integral sealing means contacting other surfaces of a container neck
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Closures For Containers (AREA)
Abstract
ABSTRACT A closure cap (1) of plastics material has a circular sealing lip (5) which is arranged in the region of the join (6) between the cap wall portion (3) and the cap end portion (4), and points inwardly at an inclined angle. At its smallest diameter, the sealing lip has a rounded sealing portion (7). Below the sealing portion, the sealing lip is enlarged outwardly in a funnel-like configuration, to receive the mouth (2) of a container. By virtue of that arrangement, a reliable sealing action is produced at the outside wall portion (8) of the mouth (2) of the container, even when there are large fluctuations in tolerances. In each case, the sealing region which extends circularly around the mouth of the container is of a linear configuration, which considerably enhances the sealing action of the sealing lip.
Description
Closure caP of plastics material The invention relates to a closure cap comprising plas~ics material for closing the mouth of a container9 comprising a substantially cylindrical cap wall portion and a cap end portion 9 having at least one annulax seali.ng lip which is intended for sealing the mouth o~ the eontainerO
The invention also relates to a con-tainer closure means comprising such a c~osure cap which can be fitted OD a mou~h of a container and whi~h is intended for sealing to a substantially cylindrical outsi~e wall portion of the mouth 10 of the containerO
Closure caps o that kind7 ~hich are used in particular for bottles containing .
carbonated refreshing beveragesp are already known in many different forms9 Between the bottler and the cvnsumer9 drinks lS bottles are subjected to many fluctuations in temperature, vibration and changes in positionD and must therefore have a closuxe means which provides a reliable seal~ Annular sealing lips which co~operate with the ~utside of the mou-th of the container have already been pxoposed7 to provide a reliable seal. Thus for example the present applicantsl German laid-open application (~OS~ No 26 4~ 845 discloses an arrangement in which the sealing lip is bent upwardly when the ~crew cap is sc~ewed onto the container~ or the present applican-tsl Swiss patent speciication No ~07 702 discloses an arrangement which has a sealing lip extending substantially parallel to the wall pvrtion of the capO US ~atent speeification No 3 360 149 discloses a screw cap wherein ~n inclined sealiny lip co~operates wqth a peripheral recess ox chamfer on the mouth of the container~ Britlsh patent specifi~a*ion No ~6~
1 229 322 proposes a pexipheral sealing lip which is at any rate arranged on the cap ~nd portion and which is pressed outwardly when the cap is screwed into place, similarly as in the arrangem~nt disclosed in Swiss patent specification No 607 70Z.
A serious problem with all kno~n external sealing arrangements is that the mouths of containers suffer from large fluctuations in tolerancesO In addition; it is not possible reliably to predetermine whether such sealing lips are bent back when the cap is screwed on, or whether they are expandedJ or whether for ex~mple the container does not even bear against the lipsO
The problem of the present invention is theref~re to provide a closure cap of the kind set forth above, wherein the sealing lip engages against the mouth of the container in the same manner, even when there are larye fluctuations in -tolerances~
According to the invention9 this problem is solved by the following combination of features: the sealing lip is arr~nged on the cap wall p~rtion andJox on the cap end portion and is direc-ted at an inclined angle inwardlyl reducing in diameter; at the location of its smallest diameter, the sealing lip has a sealing portion which is of rounded cross-section; below the sealing portion the sealing lip has a substantially funnel-shaped outwardly extending enlargement, the lar~est diameter of which is larger than the outside diameter of the mouth of the container fox which the closure cap is intended; and the plastics material has elasticity properties such that the sealing lip can be expanded sleeve-like outwardly to receive the mouth o~ the container.
The container closure means, that is tc say9 the co-operation of the closure cap and the rnouth opening of the container, is characterised by the following features:
~ 2 -the sealing lip is arranged vn the cap wall portion andlor the cap end portion an~ is directed a~ an inclined angle in~ardly~ reducing in diameter~ the smallest inside diameter before being screwed on being smaller than the outside diameter of the mouth of the container9 at the lvca~ion of its smallest inside diameter~ *he sealing lip has a sealing portion which is of rounded cross-section; below the sealing portion the sealing lip has an enlargemen-t which extends outwardly in a substantially funnel-like shape~ wherein the diameter in the region o~ the lower edge of the funnel-like enlargement or the entry portion before being screwed on i5 larger than *he outside diameter o the mouth of the container~
The above-indicated arxangement of the funnel-shaped enlaxgement on the seali~g lip will be seen to ensure that the sealing lip always comes to bear against the outside of the mouth of the container~ is not bent upwardly even when *here is an excessive outside diameter on the mouth ~f the container, and in particular is also not displaced or irxegu~arly bent back~ wh n the cap is applied tv -the mouth of the containerO B~ virtue of *he rounded sealing portion on the sealing lip~ the sealing lip has a line of sealing action which is the same in all cases and which extends arQund the outside wall portion of the mouth of the container~ irrespective of the inclined positioning of the sealing lip~ It will be seen that the sealing lip can occupy a different inclined position, depending on the respective outside diameter of the mouth of the con*ainer~ Depending on the inclined posi-tion of the sealing lip~ the line of sealing ac-tion against the mouth of the container will be somewhat higher or somewhat lower.
The essential consideration in this connection is tha-t the funnel~like enlargement has an entxy portion which in cross-section is of a curved configuration which extends subs-tantially at an anale9 relative ~o ~he longitudinal axis of the cap wall portion,/ ~ ~ the norm~l to each part of the entry portion extends below the centre of rotation of the sealing lip ~r the axis which is neutral in bending of the sealing lip S cross-section in the region ~ the j~in between the sealing lip and the cap end portion or the cap wall portion~
In this respeet, the expression entry portion is intended to mean that region of the funnel-like enlaraement which is intended for continuous insertion of the mouth of the container 9 10 while at the s~me time expanding the sealing lip. It will be appreciated that the sea1 ing lip may be in the form of an entry portion in the entire region of the funnel~like enlargement~ Particularly when the se~ling li~ is to be for~ed with a somewhat thiekex cxoss-section howevex~ only a part of the side of the sealing lip, which is towards the container mouth~ may be in the form o an entry portion.
It will be seen that the centre of rotation of the sealing lip may be readily ascertained in a cross-sectional vi~w of the sealing lip and cap wall portion or cap en~ portion. That point is concerned with the neutral axis i~ the interior of the sealing lip which, upon bending *hereofJ is not subjected either to a tensile load ~r to a compression load9 and remains ~neutral~O
In the case of sealing lips of which the top and bvttom extend parallel to each other~ the neutral axis coincides with the cen~re line of -the cross~section o the sealing lipo When the sealing lip is of a cross-section which co~verges at an angle 7 the neutral axis generally coincides with the an~le bisector.
It wi.ll be seen that the man skilled in the art will not find any problem in definin~ the neutral axis (also re~erred to as the zero line) and the ~ ; n~y centre of rotation in the region in which the sealing lip joins to *he cap wall poxtion or the cap end portion respe~tively. The precise point may be 6~
established with a s~fficient degree of accuracy or example by joining together the two "points vf origin" ~f the sealing lip on the cap end portion ~r the cap wall portion, and by considering the point of intersection of that line with the centre line or the neutral ~xis of the cross sectivn of the sealing lip9 as the centre of rotation. X* will be appreciated that it may also be defined by empirioal tests, for example by showing Uunbent" and ~Ibent~i sealing lips on a split view projector. If diff erenc s are found between empirical definition and yraphic definition9 then for reasons o saf2ty9 the front centre of rotation~ that is to say~ that which is closer to the entry portion, can be used~ If the entry portion is in -the shape of a truncated cone9 that is to Say9 i5 in the form of an inclinedly extending straight line in cross section, the normal to that s*raight line may be readily defined, ~hen producing an image of the cross sectionO If the entry portion is entirely or partially in the fo~m of a curve ~concave or convex), the normal to each entry portion may be gr~phically represented by first applying a tangent to the c~rved portion to be defined, and *hen drawing a line normal to the tangentO
If the surface of the sealing lip and/ox the entry porti~n has an irregular suxface, as may occur ~or example by the provision of circulaxly extending grooves in oxder to enhance the sealin~ action, then it will be appreciated that the opexation of defining the above-mentioned normal is not based on the configuration of the "micro-grooves", but on *he general curve configuration of the entry portion~ against which the mouth of the container bearsO
. In some situations of use9 it is advantageous for the point of attachment of the sealing lip to the cap end pvrtion to be arranged at a spacing from the cap wall por*ion and for the mou*h of *he containex, in the container closure means, to have peripheral I reduced-diamet~r channel or chamfer3 for receiving the sealing lip.
~ ox production process reasons, it is easier to provide only a relatively small portion with small tolerances, on the mouth of the bot~le. Tha* portion is in the for~ of a channel or cha~fer 50 that it will be seen that the sealing lip must also be of smaller diameterp at its point of attac}~enta By virtue of that arrangement, the above-mentioned point o attachment is shifted entirely onto the cover portion, ~hic~
possibly results in the sealing lip having better resiliency.
Tha* arxangement is particularly sui~able for cont~iner mouths of large di~meters~ wherein *here is sufficient spaceO
A particularly advantageous arrangement and configura~ion in respect of the sealing lip is achieved i~ the sealing lip îs arranged at an angle of at most 45 with respect to the wall portion of the cap. In this way) the sealing lip may be arrange~ on the inside of the scxew cap~ thereby saving space, although it is nonetheless capable of accommodating wide fluctua*ions in tolerances a~ the mouth of the container. If the funnel-shaped enlargement extends a* an angle of at moSt 45 with respect to the axial centre line9 the sealing lip is -- reliably expanded outwardly without being bent back and without the need to apply a large am~unt of force when fitting the cap ln pos~ tion .
The action of the sealiny lip may be enhanced in some cases by an abutment means being provided on the cap end portion, within the sealing lip~ to delimit the relative position of the cap end portion with respect to the mouth of the containe~. In a bottling plant~ closure caps are fitted onto the mouth of the container by machine~ by applying a aiven torque. In this respect, the abutment means mak~s it easier to accurately define and adjust the torgue required~ and ensures )6 that the sleeve-like ring is in the same position, at a spacing f~om the upper edge of *he mouth of the container.
An additional sealing action can be achieved by the abutment means being in the form of a concentric porti~n ~hich co-operates ~ith the top of the mouth of the containér~
The outside surfaces of container mouth structures sometimes have such severe damage thereto that the sealing lip on the outside can no longe~ properly pexform its function~ Therefore 9 an additional sealing portion enhances the reliability and security of the en~ire closure means~ The safety factor in regard to the sealing action can be further enhanced by the closure cap having an inner sealing means which pro~ects into the mouth of the container~ In this xespect~ in particular the combination of the various sealing systems gives a closure cap which has a reliable and satisactory sealing effec-tO
The flexibility of the sealing lip and the sealing action of the sealing lip may be increased by providiny a peripheral depressi~n or recess in the cap end portion, on the inward side. The depression or xecess prevents the f~rmation of cracks in the sealing lip matexial, ev~n when the sealing lip is severely stre*chedO
The spring action of the sealing lip against the m~u th of the contai~er ~ay be maintained in a particularly reliable ~ashion by virtue of the inside diameter at the location at 25 which the ~ealing l~ o~sthe cap end portion being larger -than ~he ou~side diameter o the mouth-of the container. The above~
mentioned spring action may be fur~hex increased by the sealina lip being rigidly connected to *he cap end portion in such a way that i-t can be pressed against the outside wall surface of the mouth of the container by the curvature of the cap end portion~ which occurs when an internal pressure is produced~
The sealing lip will be pressed ~gainst the outside wall surface i606 of the mouth o the containex to an increas~d degree~ in propo~tion to the screw cap being more firmly scr~wed on-to the mouth of the container or in proportion to the increased curvature which is produced in the cap end portion when the S cap is screwed onto the mouth of the container~
Embodiments of the invention are described in greater detail hereinaftex and illustlated in the d~awings in which:
~ igure 1 shows a sectional view on an enlarged scale of par~ of a closure cap according to the invention 9 Figure 2 shows the cl~sure cap shown in Figure 19 on the mouth o a container7 Figure 3 shows a modified embodime~t of the inven*ion, ~igure 4 shows a v~ew on an enlarged scale of a sealing lip having the featurès of the invention~
~igure 5 shows ~he sealing lip of Figure 4 in a position of engagement with the mouth of a containe~ and ~igure 6 shows a sealing lip at a spacing from the cap wall portion with a channel or chamfer on the mouth of the container~
Figure 1 shows a closure cap comprising a substantially cylindrical cap wall po*tion 3 and a cap end portion 40 The inside of the cap ~all portion 3 is provided wi-th a screw thread~
A sealing lip 5 which extends at an inclined angle inwa~dly is disposed approxima-tely in the region of the join 6 between the cap end p~rtion and the cap wall poxtion. The sealing lip is at an angle ~ of for example 25 to 30 with respect to ~he ~ap wall portion 3~ A rounded sealing portion 7 is disposed in the regio~ of the smallest inside di~meter A of the s~aling lip 50 Below the sealing portion 7 9 the sealing lip has a funnel~ e enlargement 9 whio~ is at an angle ~ of 30 with xespect to the ~axial centre line ~ (See Figuxe 4)0 3~
- Provided on the inside of the sealing lip 5 is a concentric abu*ment means 10 for delimiting the scxewing-on n~ovement of the capO ~n additional inner sealino means 13 seals against th~ inside of the mou*h 2 of the container~ as can be particulaxly clearly seen from ~igure 2. The closure cap may be provided in per se known manner with a guarantee strip 15 which mus~ be removed by the consumer before the container closure arrangement is op~ned for the firs~ timeO
The lower edge 16 of the ~unn~l-like enlargement 9 is of a diameter D which, before the cap is screwed on, is in any case already larger than the outside diameter B o the ou$si.de wall portion 8 of the mouth 2 of the container~ That ensures that the sealing lip 5 is bent outwardly~ as shown in ~ig~re 2, and bears against the outsid~ wall portion 87 by means of its rounded sealing p~rtion 7.
If possible, the sealing lip 5 should not be b~nt outwardly by.the mouth of *he container *o such an exten* that it extends virtually parallel *o the outside wall portion 8 of the mouth of the containerO I~ that happens~ there would be th~ danger that the sealing portion between the mouth of the container and the sea~ing lip would no longer be linear but would be a sealing area~ Xhat may be reliably prevented by the diameter C
at the location 14 at which the sealiny lip is attached to the cap end portion 4 being larger than the outside diameter B of the outer wall portion 8 of the container mouth. In this way9 when the closure cap is screwed onto the mouth of the container the sealing lip 5 is always slightly incIined inw~rdly so that there cannot be a sealing portion which seals over an area, but instead~ the co~operation between the cylindrical ou~er wall portion 8 of the mouth of the container and the rounded sealing portion 7 of the sealing lip 5 always maintains a linear sealing region~ with constant sealing properties~
3~i ~
~ i~ure 2 shows the screw cap 1 in its condition of being fully screwed into place on the ~outh of a containerO In this conditionJ the top 17 of the mouth of the container bears against the concentric abutmer3t means 10, whexeby the cap end portion 4 is pressed slightly upwardlyO The cay end portion 4 is ormed into a curved configurationg to a greater or lesser de~ree~ depending on the tvrque applied to screw the cap into place. By virtue of suitable dimensioning in re~pect of wall thickness and the location of attachment thereof 7 the sealing lip 5 is rigidly connected to the cap end portion 4 in such a way that the sealin~ lip S is pressed inwardly in the direction indicated by ~he arrow X, when the cap end portion is of a curved configuration. It will be seen that this can enhance the effect of the sealing lip~
Figure 3 shows a m~dified embodiment wherein a further sealing portion 11 is arranged within the sealing lip. The further sealing portion 11 simultaneously performs the function of an abutment means9 for restricting the screwing ~ovementO
In ordex to avoid material stressing and thus cracks in the sealing lip 5 when the closure cap i5 screwed into place 9 a depression or recess 12 is provided in the cap end portion 4, on the inside of the sealing lip,D ~his is particularly advantageous because there is a relatively short distance between the sealing portivn 7 where the sealing lip S is most stretched~ and -the c~p end porti.on 4. That distance is ef~ectively increased by the provision o~ the depression 12 3 thereby increasing the stretchability of the eap in the region of the sealing portion 70 That increases the possible number of materials that can be selected for use, ~nd in addition -the sealing lip is capahle of adapting to wide fluctuations in tolerances in respect of the outside diameteI B ~see ~igure 2) of the mouth of *he oont~iner~ -3~
- The sealing lip S shown in ~igure 3 is of a so~ewhat diferent CQnfi9Ura*iOn from that shown in F`igure 1~ Howe~er~
it performs the same functionO The two sealing lips 5 and 11 and -the inner sealing means 13 togethex form a sealing system in the upper mouth region of the container~ which ensures a particularly xeliable and advantageous sealing actionO It will be appreciated that it is readily possible alternatively to use other ~ealing systems, in combination with the inclined sealing lip 5~ The configuration of the closure cap may also be altered as ~esired, without thereby departing from the subject-matter of this invention~ The mouth of the container may be inserted into the sealing lip in a particularly gentle and trouble-ree manner~ if the closure cap and the mou-th of the container are provided with a screw threadO Thus, it is in particular possible to envisage *he closure cap having a multiple internal thxead, or parts of the closure cap being made from metal or another material. Xt is particulaLly advantageous for the closure cap to be produced by an injection moulding process~ using polyethylene or polypropylene~
Reerriny now to ~i~ure 4 9 a sealing lip 5 has an entry portion 9a in the region of the funnel~shaped enlargement 9 The entry portion 9a extends between the rounded sPaling portion 7 and a bottom flat portion 18. The drawing shows the sealing lip in broken~line positions in which it is bent upwardly and in which it is bent downwaxdly~ When the sealing lip is subjected to bending, one side thereof is subjected to a compression stress while the other side is subjected to a tensile stress7 as is known f~om the science of the strength of materials or stress analysis. A5 the sealing lip has substantially paxallel side walls 9 the centre line M also indicates the neutral axîs at which the sealing lip 5 7 when subjected to bending, is loa~ed neither in respect of tensile ~ 11 --6~
stress nor in respect of compression stressO The centre or point of ~otation D about which the sealing lip is notionally pivoted9 that is to sayj the point D remains in its positi~n when the sealiny lip 5 is bent, is disposed in the region of ~he connecting line V between the two join locations 1~ and 17a~
The ~urved configuration of the entry portion 9a i5 such that the normal lines Sl *o S3 at each part of the entry portion 9a extend beneath the c~ntre of rotation D vf the sealing lip. That also applies in regard *o the sealing portion 7~ In ~hat arrangement, the en-try portion 9a is in *he form of a straight line, so that there are no problems in representing the two normals Sl and S29 and checking -the configuration. On the other hand~ the sealing portion 7 is of a rounded configuration so that firs* of all a tangent must be drawn to the respective curvature to be examined? in order then to draw the line S3 normal to that tangent, for the portion which is to be checked.
It will be ceen th~t the formation of the angle ~ , in accordance with the invention9 in dependence on the centre of xotation D of the sealing lip~ means that, when the mouth Z of a container penetxa*es into the sealing lip S, it stretches the sealing ~poutwardly so as to cause e~pansion thereof, and does not press the sealing lip upwardly towards tAe cap end portion Figure 5 shows an embodiment which is similax to that shown in Figure 4 7 with the sealing lip 5 being illustrated in the expanded and the une~panded conditionsO The sealing portion 7 and the entry po~tion 9a in this arrangement are provided with concentxically extending grooves which9 in certain situations of use, can enhance the sealing properties of the sealing portion 7~ It will be seen that this embodiment too fulils the condition that the normal lines S~ ~nd S3 pass below the centre of rotati~n D of the sealing lip~ More specifically, in comparison with th~ upper edge 20 of the mouth of the container~ the grooves lg are so small that they do not affect the distribution or pattern of forces ir. the sealing lip 5 during the insextion movement. The grooves 19 can at best influence the friction as between the uppex edge 20 of the mouth 2 of the container, and the en-try portion 9aO The lines S2 and S3 are thexefoxe formed in such a way that they are drawn in rela-tion to the overall curvature and not the ~rooves.
Figure 6 shows an ~mbodimen* as is used for container mouths of large diameters, with sufficient space therein. The location 14 of attachment of thP sealing lip 5 is arranged at a certain spacing from the cap wall p~rtion 3, on the cap end portion 4~ The transition from the cap wall portion 3 to the sealing lip 5 is advan*ageously xadiused, as in the other embodiments~ .
A channel or chamfer lB for receiving ~he sealing lip 5 is provided on the mouth of the container~ at a set-back position~ The configuration 18 can be produced with particulaxly accurate tolerances so that the same sealing action _ can be achieved with all container closure meansO
The invention also relates to a con-tainer closure means comprising such a c~osure cap which can be fitted OD a mou~h of a container and whi~h is intended for sealing to a substantially cylindrical outsi~e wall portion of the mouth 10 of the containerO
Closure caps o that kind7 ~hich are used in particular for bottles containing .
carbonated refreshing beveragesp are already known in many different forms9 Between the bottler and the cvnsumer9 drinks lS bottles are subjected to many fluctuations in temperature, vibration and changes in positionD and must therefore have a closuxe means which provides a reliable seal~ Annular sealing lips which co~operate with the ~utside of the mou-th of the container have already been pxoposed7 to provide a reliable seal. Thus for example the present applicantsl German laid-open application (~OS~ No 26 4~ 845 discloses an arrangement in which the sealing lip is bent upwardly when the ~crew cap is sc~ewed onto the container~ or the present applican-tsl Swiss patent speciication No ~07 702 discloses an arrangement which has a sealing lip extending substantially parallel to the wall pvrtion of the capO US ~atent speeification No 3 360 149 discloses a screw cap wherein ~n inclined sealiny lip co~operates wqth a peripheral recess ox chamfer on the mouth of the container~ Britlsh patent specifi~a*ion No ~6~
1 229 322 proposes a pexipheral sealing lip which is at any rate arranged on the cap ~nd portion and which is pressed outwardly when the cap is screwed into place, similarly as in the arrangem~nt disclosed in Swiss patent specification No 607 70Z.
A serious problem with all kno~n external sealing arrangements is that the mouths of containers suffer from large fluctuations in tolerancesO In addition; it is not possible reliably to predetermine whether such sealing lips are bent back when the cap is screwed on, or whether they are expandedJ or whether for ex~mple the container does not even bear against the lipsO
The problem of the present invention is theref~re to provide a closure cap of the kind set forth above, wherein the sealing lip engages against the mouth of the container in the same manner, even when there are larye fluctuations in -tolerances~
According to the invention9 this problem is solved by the following combination of features: the sealing lip is arr~nged on the cap wall p~rtion andJox on the cap end portion and is direc-ted at an inclined angle inwardlyl reducing in diameter; at the location of its smallest diameter, the sealing lip has a sealing portion which is of rounded cross-section; below the sealing portion the sealing lip has a substantially funnel-shaped outwardly extending enlargement, the lar~est diameter of which is larger than the outside diameter of the mouth of the container fox which the closure cap is intended; and the plastics material has elasticity properties such that the sealing lip can be expanded sleeve-like outwardly to receive the mouth o~ the container.
The container closure means, that is tc say9 the co-operation of the closure cap and the rnouth opening of the container, is characterised by the following features:
~ 2 -the sealing lip is arranged vn the cap wall portion andlor the cap end portion an~ is directed a~ an inclined angle in~ardly~ reducing in diameter~ the smallest inside diameter before being screwed on being smaller than the outside diameter of the mouth of the container9 at the lvca~ion of its smallest inside diameter~ *he sealing lip has a sealing portion which is of rounded cross-section; below the sealing portion the sealing lip has an enlargemen-t which extends outwardly in a substantially funnel-like shape~ wherein the diameter in the region o~ the lower edge of the funnel-like enlargement or the entry portion before being screwed on i5 larger than *he outside diameter o the mouth of the container~
The above-indicated arxangement of the funnel-shaped enlaxgement on the seali~g lip will be seen to ensure that the sealing lip always comes to bear against the outside of the mouth of the container~ is not bent upwardly even when *here is an excessive outside diameter on the mouth ~f the container, and in particular is also not displaced or irxegu~arly bent back~ wh n the cap is applied tv -the mouth of the containerO B~ virtue of *he rounded sealing portion on the sealing lip~ the sealing lip has a line of sealing action which is the same in all cases and which extends arQund the outside wall portion of the mouth of the container~ irrespective of the inclined positioning of the sealing lip~ It will be seen that the sealing lip can occupy a different inclined position, depending on the respective outside diameter of the mouth of the con*ainer~ Depending on the inclined posi-tion of the sealing lip~ the line of sealing ac-tion against the mouth of the container will be somewhat higher or somewhat lower.
The essential consideration in this connection is tha-t the funnel~like enlargement has an entxy portion which in cross-section is of a curved configuration which extends subs-tantially at an anale9 relative ~o ~he longitudinal axis of the cap wall portion,/ ~ ~ the norm~l to each part of the entry portion extends below the centre of rotation of the sealing lip ~r the axis which is neutral in bending of the sealing lip S cross-section in the region ~ the j~in between the sealing lip and the cap end portion or the cap wall portion~
In this respeet, the expression entry portion is intended to mean that region of the funnel-like enlaraement which is intended for continuous insertion of the mouth of the container 9 10 while at the s~me time expanding the sealing lip. It will be appreciated that the sea1 ing lip may be in the form of an entry portion in the entire region of the funnel~like enlargement~ Particularly when the se~ling li~ is to be for~ed with a somewhat thiekex cxoss-section howevex~ only a part of the side of the sealing lip, which is towards the container mouth~ may be in the form o an entry portion.
It will be seen that the centre of rotation of the sealing lip may be readily ascertained in a cross-sectional vi~w of the sealing lip and cap wall portion or cap en~ portion. That point is concerned with the neutral axis i~ the interior of the sealing lip which, upon bending *hereofJ is not subjected either to a tensile load ~r to a compression load9 and remains ~neutral~O
In the case of sealing lips of which the top and bvttom extend parallel to each other~ the neutral axis coincides with the cen~re line of -the cross~section o the sealing lipo When the sealing lip is of a cross-section which co~verges at an angle 7 the neutral axis generally coincides with the an~le bisector.
It wi.ll be seen that the man skilled in the art will not find any problem in definin~ the neutral axis (also re~erred to as the zero line) and the ~ ; n~y centre of rotation in the region in which the sealing lip joins to *he cap wall poxtion or the cap end portion respe~tively. The precise point may be 6~
established with a s~fficient degree of accuracy or example by joining together the two "points vf origin" ~f the sealing lip on the cap end portion ~r the cap wall portion, and by considering the point of intersection of that line with the centre line or the neutral ~xis of the cross sectivn of the sealing lip9 as the centre of rotation. X* will be appreciated that it may also be defined by empirioal tests, for example by showing Uunbent" and ~Ibent~i sealing lips on a split view projector. If diff erenc s are found between empirical definition and yraphic definition9 then for reasons o saf2ty9 the front centre of rotation~ that is to say~ that which is closer to the entry portion, can be used~ If the entry portion is in -the shape of a truncated cone9 that is to Say9 i5 in the form of an inclinedly extending straight line in cross section, the normal to that s*raight line may be readily defined, ~hen producing an image of the cross sectionO If the entry portion is entirely or partially in the fo~m of a curve ~concave or convex), the normal to each entry portion may be gr~phically represented by first applying a tangent to the c~rved portion to be defined, and *hen drawing a line normal to the tangentO
If the surface of the sealing lip and/ox the entry porti~n has an irregular suxface, as may occur ~or example by the provision of circulaxly extending grooves in oxder to enhance the sealin~ action, then it will be appreciated that the opexation of defining the above-mentioned normal is not based on the configuration of the "micro-grooves", but on *he general curve configuration of the entry portion~ against which the mouth of the container bearsO
. In some situations of use9 it is advantageous for the point of attachment of the sealing lip to the cap end pvrtion to be arranged at a spacing from the cap wall por*ion and for the mou*h of *he containex, in the container closure means, to have peripheral I reduced-diamet~r channel or chamfer3 for receiving the sealing lip.
~ ox production process reasons, it is easier to provide only a relatively small portion with small tolerances, on the mouth of the bot~le. Tha* portion is in the for~ of a channel or cha~fer 50 that it will be seen that the sealing lip must also be of smaller diameterp at its point of attac}~enta By virtue of that arrangement, the above-mentioned point o attachment is shifted entirely onto the cover portion, ~hic~
possibly results in the sealing lip having better resiliency.
Tha* arxangement is particularly sui~able for cont~iner mouths of large di~meters~ wherein *here is sufficient spaceO
A particularly advantageous arrangement and configura~ion in respect of the sealing lip is achieved i~ the sealing lip îs arranged at an angle of at most 45 with respect to the wall portion of the cap. In this way) the sealing lip may be arrange~ on the inside of the scxew cap~ thereby saving space, although it is nonetheless capable of accommodating wide fluctua*ions in tolerances a~ the mouth of the container. If the funnel-shaped enlargement extends a* an angle of at moSt 45 with respect to the axial centre line9 the sealing lip is -- reliably expanded outwardly without being bent back and without the need to apply a large am~unt of force when fitting the cap ln pos~ tion .
The action of the sealiny lip may be enhanced in some cases by an abutment means being provided on the cap end portion, within the sealing lip~ to delimit the relative position of the cap end portion with respect to the mouth of the containe~. In a bottling plant~ closure caps are fitted onto the mouth of the container by machine~ by applying a aiven torque. In this respect, the abutment means mak~s it easier to accurately define and adjust the torgue required~ and ensures )6 that the sleeve-like ring is in the same position, at a spacing f~om the upper edge of *he mouth of the container.
An additional sealing action can be achieved by the abutment means being in the form of a concentric porti~n ~hich co-operates ~ith the top of the mouth of the containér~
The outside surfaces of container mouth structures sometimes have such severe damage thereto that the sealing lip on the outside can no longe~ properly pexform its function~ Therefore 9 an additional sealing portion enhances the reliability and security of the en~ire closure means~ The safety factor in regard to the sealing action can be further enhanced by the closure cap having an inner sealing means which pro~ects into the mouth of the container~ In this xespect~ in particular the combination of the various sealing systems gives a closure cap which has a reliable and satisactory sealing effec-tO
The flexibility of the sealing lip and the sealing action of the sealing lip may be increased by providiny a peripheral depressi~n or recess in the cap end portion, on the inward side. The depression or xecess prevents the f~rmation of cracks in the sealing lip matexial, ev~n when the sealing lip is severely stre*chedO
The spring action of the sealing lip against the m~u th of the contai~er ~ay be maintained in a particularly reliable ~ashion by virtue of the inside diameter at the location at 25 which the ~ealing l~ o~sthe cap end portion being larger -than ~he ou~side diameter o the mouth-of the container. The above~
mentioned spring action may be fur~hex increased by the sealina lip being rigidly connected to *he cap end portion in such a way that i-t can be pressed against the outside wall surface of the mouth of the container by the curvature of the cap end portion~ which occurs when an internal pressure is produced~
The sealing lip will be pressed ~gainst the outside wall surface i606 of the mouth o the containex to an increas~d degree~ in propo~tion to the screw cap being more firmly scr~wed on-to the mouth of the container or in proportion to the increased curvature which is produced in the cap end portion when the S cap is screwed onto the mouth of the container~
Embodiments of the invention are described in greater detail hereinaftex and illustlated in the d~awings in which:
~ igure 1 shows a sectional view on an enlarged scale of par~ of a closure cap according to the invention 9 Figure 2 shows the cl~sure cap shown in Figure 19 on the mouth o a container7 Figure 3 shows a modified embodime~t of the inven*ion, ~igure 4 shows a v~ew on an enlarged scale of a sealing lip having the featurès of the invention~
~igure 5 shows ~he sealing lip of Figure 4 in a position of engagement with the mouth of a containe~ and ~igure 6 shows a sealing lip at a spacing from the cap wall portion with a channel or chamfer on the mouth of the container~
Figure 1 shows a closure cap comprising a substantially cylindrical cap wall po*tion 3 and a cap end portion 40 The inside of the cap ~all portion 3 is provided wi-th a screw thread~
A sealing lip 5 which extends at an inclined angle inwa~dly is disposed approxima-tely in the region of the join 6 between the cap end p~rtion and the cap wall poxtion. The sealing lip is at an angle ~ of for example 25 to 30 with respect to ~he ~ap wall portion 3~ A rounded sealing portion 7 is disposed in the regio~ of the smallest inside di~meter A of the s~aling lip 50 Below the sealing portion 7 9 the sealing lip has a funnel~ e enlargement 9 whio~ is at an angle ~ of 30 with xespect to the ~axial centre line ~ (See Figuxe 4)0 3~
- Provided on the inside of the sealing lip 5 is a concentric abu*ment means 10 for delimiting the scxewing-on n~ovement of the capO ~n additional inner sealino means 13 seals against th~ inside of the mou*h 2 of the container~ as can be particulaxly clearly seen from ~igure 2. The closure cap may be provided in per se known manner with a guarantee strip 15 which mus~ be removed by the consumer before the container closure arrangement is op~ned for the firs~ timeO
The lower edge 16 of the ~unn~l-like enlargement 9 is of a diameter D which, before the cap is screwed on, is in any case already larger than the outside diameter B o the ou$si.de wall portion 8 of the mouth 2 of the container~ That ensures that the sealing lip 5 is bent outwardly~ as shown in ~ig~re 2, and bears against the outsid~ wall portion 87 by means of its rounded sealing p~rtion 7.
If possible, the sealing lip 5 should not be b~nt outwardly by.the mouth of *he container *o such an exten* that it extends virtually parallel *o the outside wall portion 8 of the mouth of the containerO I~ that happens~ there would be th~ danger that the sealing portion between the mouth of the container and the sea~ing lip would no longer be linear but would be a sealing area~ Xhat may be reliably prevented by the diameter C
at the location 14 at which the sealiny lip is attached to the cap end portion 4 being larger than the outside diameter B of the outer wall portion 8 of the container mouth. In this way9 when the closure cap is screwed onto the mouth of the container the sealing lip 5 is always slightly incIined inw~rdly so that there cannot be a sealing portion which seals over an area, but instead~ the co~operation between the cylindrical ou~er wall portion 8 of the mouth of the container and the rounded sealing portion 7 of the sealing lip 5 always maintains a linear sealing region~ with constant sealing properties~
3~i ~
~ i~ure 2 shows the screw cap 1 in its condition of being fully screwed into place on the ~outh of a containerO In this conditionJ the top 17 of the mouth of the container bears against the concentric abutmer3t means 10, whexeby the cap end portion 4 is pressed slightly upwardlyO The cay end portion 4 is ormed into a curved configurationg to a greater or lesser de~ree~ depending on the tvrque applied to screw the cap into place. By virtue of suitable dimensioning in re~pect of wall thickness and the location of attachment thereof 7 the sealing lip 5 is rigidly connected to the cap end portion 4 in such a way that the sealin~ lip S is pressed inwardly in the direction indicated by ~he arrow X, when the cap end portion is of a curved configuration. It will be seen that this can enhance the effect of the sealing lip~
Figure 3 shows a m~dified embodiment wherein a further sealing portion 11 is arranged within the sealing lip. The further sealing portion 11 simultaneously performs the function of an abutment means9 for restricting the screwing ~ovementO
In ordex to avoid material stressing and thus cracks in the sealing lip 5 when the closure cap i5 screwed into place 9 a depression or recess 12 is provided in the cap end portion 4, on the inside of the sealing lip,D ~his is particularly advantageous because there is a relatively short distance between the sealing portivn 7 where the sealing lip S is most stretched~ and -the c~p end porti.on 4. That distance is ef~ectively increased by the provision o~ the depression 12 3 thereby increasing the stretchability of the eap in the region of the sealing portion 70 That increases the possible number of materials that can be selected for use, ~nd in addition -the sealing lip is capahle of adapting to wide fluctuations in tolerances in respect of the outside diameteI B ~see ~igure 2) of the mouth of *he oont~iner~ -3~
- The sealing lip S shown in ~igure 3 is of a so~ewhat diferent CQnfi9Ura*iOn from that shown in F`igure 1~ Howe~er~
it performs the same functionO The two sealing lips 5 and 11 and -the inner sealing means 13 togethex form a sealing system in the upper mouth region of the container~ which ensures a particularly xeliable and advantageous sealing actionO It will be appreciated that it is readily possible alternatively to use other ~ealing systems, in combination with the inclined sealing lip 5~ The configuration of the closure cap may also be altered as ~esired, without thereby departing from the subject-matter of this invention~ The mouth of the container may be inserted into the sealing lip in a particularly gentle and trouble-ree manner~ if the closure cap and the mou-th of the container are provided with a screw threadO Thus, it is in particular possible to envisage *he closure cap having a multiple internal thxead, or parts of the closure cap being made from metal or another material. Xt is particulaLly advantageous for the closure cap to be produced by an injection moulding process~ using polyethylene or polypropylene~
Reerriny now to ~i~ure 4 9 a sealing lip 5 has an entry portion 9a in the region of the funnel~shaped enlargement 9 The entry portion 9a extends between the rounded sPaling portion 7 and a bottom flat portion 18. The drawing shows the sealing lip in broken~line positions in which it is bent upwardly and in which it is bent downwaxdly~ When the sealing lip is subjected to bending, one side thereof is subjected to a compression stress while the other side is subjected to a tensile stress7 as is known f~om the science of the strength of materials or stress analysis. A5 the sealing lip has substantially paxallel side walls 9 the centre line M also indicates the neutral axîs at which the sealing lip 5 7 when subjected to bending, is loa~ed neither in respect of tensile ~ 11 --6~
stress nor in respect of compression stressO The centre or point of ~otation D about which the sealing lip is notionally pivoted9 that is to sayj the point D remains in its positi~n when the sealiny lip 5 is bent, is disposed in the region of ~he connecting line V between the two join locations 1~ and 17a~
The ~urved configuration of the entry portion 9a i5 such that the normal lines Sl *o S3 at each part of the entry portion 9a extend beneath the c~ntre of rotation D vf the sealing lip. That also applies in regard *o the sealing portion 7~ In ~hat arrangement, the en-try portion 9a is in *he form of a straight line, so that there are no problems in representing the two normals Sl and S29 and checking -the configuration. On the other hand~ the sealing portion 7 is of a rounded configuration so that firs* of all a tangent must be drawn to the respective curvature to be examined? in order then to draw the line S3 normal to that tangent, for the portion which is to be checked.
It will be ceen th~t the formation of the angle ~ , in accordance with the invention9 in dependence on the centre of xotation D of the sealing lip~ means that, when the mouth Z of a container penetxa*es into the sealing lip S, it stretches the sealing ~poutwardly so as to cause e~pansion thereof, and does not press the sealing lip upwardly towards tAe cap end portion Figure 5 shows an embodiment which is similax to that shown in Figure 4 7 with the sealing lip 5 being illustrated in the expanded and the une~panded conditionsO The sealing portion 7 and the entry po~tion 9a in this arrangement are provided with concentxically extending grooves which9 in certain situations of use, can enhance the sealing properties of the sealing portion 7~ It will be seen that this embodiment too fulils the condition that the normal lines S~ ~nd S3 pass below the centre of rotati~n D of the sealing lip~ More specifically, in comparison with th~ upper edge 20 of the mouth of the container~ the grooves lg are so small that they do not affect the distribution or pattern of forces ir. the sealing lip 5 during the insextion movement. The grooves 19 can at best influence the friction as between the uppex edge 20 of the mouth 2 of the container, and the en-try portion 9aO The lines S2 and S3 are thexefoxe formed in such a way that they are drawn in rela-tion to the overall curvature and not the ~rooves.
Figure 6 shows an ~mbodimen* as is used for container mouths of large diameters, with sufficient space therein. The location 14 of attachment of thP sealing lip 5 is arranged at a certain spacing from the cap wall p~rtion 3, on the cap end portion 4~ The transition from the cap wall portion 3 to the sealing lip 5 is advan*ageously xadiused, as in the other embodiments~ .
A channel or chamfer lB for receiving ~he sealing lip 5 is provided on the mouth of the container~ at a set-back position~ The configuration 18 can be produced with particulaxly accurate tolerances so that the same sealing action _ can be achieved with all container closure meansO
Claims (14)
1. A closure cap of plastic material for clos-ing and sealing the mouth of a container comprising a sub-stantially cylindrical cap wall portion and a cap end portion and an inclined annular sealing lip extending downwardly and inwardly from an inner upper surface of the cap, the sealing lip being of reduced diameter in downward direction toward its lower edge and having an annular sealing surface of rounded cross-section on its inner surface at its point of smallest diameter, and an annular downwardly and outwardly inclined entry surface on the sealing lip between the sealing surface and the lower edge of the sealing lip, the largest diameter of the entry surface being greater than the outside diameter of the mouth of the container for which the cap is intended, the plastic material forming the cap being suf-ficiently resilient to enable outward expansion of the sealing lip to receive the container mouth therein, the sealing lip expanding resiliently outwardly with respect to a neutral axis of rotation therein;
the entry surface being inclined with respect to the longitudinal axis of the cap at an angle such that a normal projected outwardly from each point thereon will pass below the neutral axis of rotation of the sealing lip.
the entry surface being inclined with respect to the longitudinal axis of the cap at an angle such that a normal projected outwardly from each point thereon will pass below the neutral axis of rotation of the sealing lip.
2. A cap according to claim 1 wherein the entry surface is of curved configuration in cross-section.
3. A cap according to claim 1 wherein the inside diameter of the sealing lip at both its lower edge and at its securement to the cap is greater than the outside diameter of the container mouth for which the cap is intended.
4. A cap according to claim 1 wherein the seal-ing lip joins the cap where the cap wall portion meets the cap top portion.
5. A cap according to claim 1 wherein the seal-ing lip extends downwardly and inwardly from the cap top portion at a distance inwardly from the cap wall portion.
6. Closure means for closing and sealing a mouth of a container comprising a cap of plastic material having a substantially cylindrical cap wall portion and cap end portion and an inclined annular sealing lip extending downwardly and inward-ly from an inner upper surface of the cap, the sealing lip being of reduced diameter in downward direction towards its lower edge with its smallest inside diameter being less than the outer diameter of the mouth of the container for which the cap is intended, the sealing lip having an annular sealing surface of rounded cross-section on its inner surface at its point of smallest inside diameter, and an annular downwardly and outwardly inclined entry surface on the sealing lip between the sealing surface and its lower edge, the diameter of the lower edge of the sealing lip being greater than the outside diameter of the container mouth, the plastic material forming the cap being suf-ficiently resilient to enable outward expansion of the sealing lip to receive the container mouth therein, the sealing lip expanding resiliently outwardly with respect to a neutral axis of rotation therein, the entry surface being inclined with respect to the longitudinal axis of the cap at an angle such that a normal projected outwardly from each point thereon will pass below the neutral axis of rotation of the sealing lip.
7. Closure means according to claim 6 wherein the sealing lip joins the cap top portion at a distance inwardly from the cap wall portion, the mouth of the con-tainer for which the cap is intended having a peripheral surface of reduced diameter against which the sealing lip is adapted to seal.
8. A closure cap according to claim 5 having an internal screw thread for engagement with an external screw thread on the mouth of the container, the cap having an abutment on the cap end between the cap wall and the sealing lip for contact with an end surface of the container mouth to define the relative positioning of the cap to the con-tainer mouth.
9. A closure cap according to claim 8 wherein the abutment is in the form of an annular sealing projec-tion to seal against the end surface of the container mouth.
10. A closure cap according to claim 5 having an annular depression in the cap end portion between the cap wall portion and the sealing lip.
11. A closure cap according to claim 1 having an annular inner sealing means extending downwardly from the cap end portion inwardly of the sealing lip, the inner sealing means being adapted to engage into the mouth of the container.
12. A closure cap according to claim 11 having an annular sealing projection between the annular inner sealing means and the sealing lip with an annular depres-sion between the sealing projection and the annular inner sealing means which is not deeper than a second annular depression between the sealing projection and the sealing lip.
13. A closure cap according to claim 12 wherein the second annular depression extends deeper into the cap end portion than the first annular depression.
14. A container closure according to claim 6 or 7 wherein the sealing lip is rigidly secured to the cap end portion whereby outward expansion of the sealing lip to engage the container mouth is the result of an inward curving of the cap end portion during securement of the cap to the container mouth.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE3139526.0 | 1981-10-05 | ||
| DE19813139526 DE3139526A1 (en) | 1981-10-05 | 1981-10-05 | Closure cap made of plastic material |
| CH44/82 | 1982-01-06 | ||
| CH4482 | 1982-01-06 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1196606A true CA1196606A (en) | 1985-11-12 |
Family
ID=25683345
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000412738A Expired CA1196606A (en) | 1981-10-05 | 1982-10-04 | Closure cap of plastics material |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP0076778A1 (en) |
| CA (1) | CA1196606A (en) |
| ES (1) | ES275446U (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0932515B1 (en) * | 1996-10-24 | 2001-09-05 | Minnesota Mining And Manufacturing Company | A filter device for filtering a fluid |
| US6325226B1 (en) | 1997-02-14 | 2001-12-04 | Bericap Gmbh & Co. Kg | Plastic screw closure |
| WO2008098362A1 (en) | 2007-02-13 | 2008-08-21 | Crealise Conditionnement Inc. | Cap with no attached seal |
| US7975864B2 (en) | 2001-09-10 | 2011-07-12 | Closures And Packaging Services Limited | Linerless bore seal closure |
| CN103946120A (en) * | 2011-11-18 | 2014-07-23 | 利乐拉瓦尔集团及财务有限公司 | A membrane, and a neck including such membrane |
| CN103987629A (en) * | 2011-11-21 | 2014-08-13 | 希赛瓶盖系统日本有限公司 | Synthetic resin cap for carbonated beverage-filled container, closure device, and beverage-filled closure device |
| US9611079B2 (en) | 2015-03-05 | 2017-04-04 | Aptargroup, Inc. | Fitment and overcap therefor |
| US9975669B2 (en) | 2013-12-24 | 2018-05-22 | Berlcap | Hinged closure device with first opening indicator |
| USD833278S1 (en) | 2014-09-03 | 2018-11-13 | Bericap | Closure for a container |
Families Citing this family (23)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0093690A1 (en) * | 1982-05-04 | 1983-11-09 | Crown Obrist AG | Closure for a container |
| EP0147404A1 (en) * | 1983-06-02 | 1985-07-10 | WIEDMER,Ernst | Anti-tamper band for container closure |
| US4741447A (en) * | 1987-04-27 | 1988-05-03 | American National Can Company | Linerless cap closure |
| US5275287A (en) * | 1991-04-10 | 1994-01-04 | Mcg Closures Ltd. | Closures |
| GB9107515D0 (en) * | 1991-04-10 | 1991-05-29 | Metal Closures Group Ltd | Closures |
| DE4217539C2 (en) * | 1992-05-27 | 1995-01-05 | Frank Schellenbach | Sealing cap |
| DE4221004A1 (en) * | 1992-06-26 | 1994-01-05 | Mouldtec Pvg Ag Meilen | Cap for beverage bottles |
| AU745180B2 (en) * | 1998-12-07 | 2002-03-14 | Tjandra Limanjaya | Closure cap |
| US6581792B1 (en) | 1998-12-07 | 2003-06-24 | Tjandra Limanjaya | Closure cap |
| GB2369114B (en) * | 2000-11-21 | 2004-05-05 | Beeson & Sons Ltd | Plug seals for user-friendly cap assemblies |
| DE10245595A1 (en) * | 2002-09-30 | 2004-04-08 | Bericap Gmbh & Co. Kg | Screw cap for pressurized containers |
| MXPA06003594A (en) * | 2003-10-01 | 2006-08-11 | Obrist Closures Switzerland | A closure. |
| CN101044065B (en) | 2004-09-01 | 2013-02-13 | 克雷诺瓦通用密封有限公司 | Closure |
| ATE405498T1 (en) | 2004-09-01 | 2008-09-15 | Creanova Universal Closures | SEALANT FOR A CLOSURE, CLOSURE AND METHOD |
| CN101142126A (en) | 2005-03-14 | 2008-03-12 | 克雷诺瓦通用密封有限公司 | bottle cap |
| GB0609802D0 (en) * | 2006-05-17 | 2006-06-28 | Constar Int Inc | Closure |
| DE102008041499A1 (en) | 2008-08-25 | 2010-03-04 | BSH Bosch und Siemens Hausgeräte GmbH | Water pipe or hose connector or closure for washing machine and/or garden hose/sprinkler |
| GB2467355A (en) * | 2009-01-30 | 2010-08-04 | Beeson & Sons Ltd | Container closure with pressure seal |
| ES2550510T3 (en) | 2011-01-14 | 2015-11-10 | Creanova Universal Closures Limited | Closing |
| ITMO20120253A1 (en) | 2012-10-18 | 2014-04-19 | Sacmi | CAP FOR CONTAINERS. |
| US10532858B2 (en) | 2017-09-06 | 2020-01-14 | Creanova Universal Closures Ltd. | Closure for container neck finishes |
| IT201900003674U1 (en) * | 2019-10-16 | 2020-01-16 | Sacmi | CAPSULE FOR CLOSING CONTAINERS |
| IT202100025709A1 (en) * | 2021-10-07 | 2023-04-07 | Sacmi | CAP FOR CONTAINERS. |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1482569A1 (en) * | 1965-07-01 | 1969-06-19 | Hopf A Metallwerke Kg | Screw cap closure |
| US3360149A (en) * | 1965-12-22 | 1967-12-26 | Robert A Roth | Cap construction |
| GB1229322A (en) * | 1968-01-24 | 1971-04-21 | ||
| CH607702A5 (en) * | 1975-08-18 | 1978-10-13 | Obrist Ag Albert | Bottle closure, in particular a screw closure, and process for fastening the closure |
| FR2340254A1 (en) * | 1976-02-03 | 1977-09-02 | Grussen Jean | IMPROVED SEALING SCREW CAPSULE AND MANUFACTURING MOLD |
| DE2644845A1 (en) * | 1976-10-05 | 1978-04-06 | Obrist Ag Albert | PLASTIC LATCH |
| US4134513A (en) * | 1977-06-29 | 1979-01-16 | Owens-Illinois, Inc. | Child-resistant safety closure |
-
1982
- 1982-09-14 EP EP82810385A patent/EP0076778A1/en not_active Ceased
- 1982-10-04 CA CA000412738A patent/CA1196606A/en not_active Expired
- 1982-10-04 ES ES1982275446U patent/ES275446U/en active Pending
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0932515B1 (en) * | 1996-10-24 | 2001-09-05 | Minnesota Mining And Manufacturing Company | A filter device for filtering a fluid |
| US6325226B1 (en) | 1997-02-14 | 2001-12-04 | Bericap Gmbh & Co. Kg | Plastic screw closure |
| US7975864B2 (en) | 2001-09-10 | 2011-07-12 | Closures And Packaging Services Limited | Linerless bore seal closure |
| WO2008098362A1 (en) | 2007-02-13 | 2008-08-21 | Crealise Conditionnement Inc. | Cap with no attached seal |
| EP2111363A4 (en) * | 2007-02-13 | 2010-12-22 | Crealise Conditionnement Inc | CAP WITHOUT JOINT REPORTS |
| US8376164B2 (en) | 2007-02-13 | 2013-02-19 | Tetra Laval Holdings & Finance S.A. | Cap without additional seal |
| CN103946120A (en) * | 2011-11-18 | 2014-07-23 | 利乐拉瓦尔集团及财务有限公司 | A membrane, and a neck including such membrane |
| CN103987629A (en) * | 2011-11-21 | 2014-08-13 | 希赛瓶盖系统日本有限公司 | Synthetic resin cap for carbonated beverage-filled container, closure device, and beverage-filled closure device |
| US10737846B2 (en) | 2011-11-21 | 2020-08-11 | Closure Systems International Japan, Limited | Synthetic resin cap for carbonated beverage-filled container, closure device, and beverage-containing closure device |
| US9975669B2 (en) | 2013-12-24 | 2018-05-22 | Berlcap | Hinged closure device with first opening indicator |
| USD833278S1 (en) | 2014-09-03 | 2018-11-13 | Bericap | Closure for a container |
| US9611079B2 (en) | 2015-03-05 | 2017-04-04 | Aptargroup, Inc. | Fitment and overcap therefor |
| US10293988B2 (en) | 2015-03-05 | 2019-05-21 | Aptargroup, Inc. | Fitment and overcap therefor |
Also Published As
| Publication number | Publication date |
|---|---|
| EP0076778A1 (en) | 1983-04-13 |
| ES275446U (en) | 1984-02-16 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry | ||
| MKEX | Expiry |
Effective date: 20021112 |