EP0488420A1 - Fermeture pour récipient métallique et sa douille de fermeture - Google Patents

Fermeture pour récipient métallique et sa douille de fermeture Download PDF

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Publication number
EP0488420A1
EP0488420A1 EP19910120638 EP91120638A EP0488420A1 EP 0488420 A1 EP0488420 A1 EP 0488420A1 EP 19910120638 EP19910120638 EP 19910120638 EP 91120638 A EP91120638 A EP 91120638A EP 0488420 A1 EP0488420 A1 EP 0488420A1
Authority
EP
European Patent Office
Prior art keywords
closure
flange
perforated collar
leg
projection
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.)
Ceased
Application number
EP19910120638
Other languages
German (de)
English (en)
Inventor
Günter Jakob Krautkrämer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Jacob Berg GmbH and Co KG
Original Assignee
Jacob Berg GmbH and Co KG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Jacob Berg GmbH and Co KG filed Critical Jacob Berg GmbH and Co KG
Publication of EP0488420A1 publication Critical patent/EP0488420A1/fr
Ceased legal-status Critical Current

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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
    • B65D7/00—Containers having bodies formed by interconnecting or uniting two or more rigid, or substantially rigid, components made wholly or mainly of metal
    • B65D7/12—Containers having bodies formed by interconnecting or uniting two or more rigid, or substantially rigid, components made wholly or mainly of metal characterised by wall construction or by connections between walls
    • B65D7/40—Containers having bodies formed by interconnecting or uniting two or more rigid, or substantially rigid, components made wholly or mainly of metal characterised by wall construction or by connections between walls with walls formed with filling or emptying apertures
    • 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
    • B65D47/00—Closures with filling and discharging, or with discharging, devices
    • B65D47/04—Closures with discharging devices other than pumps
    • B65D47/06—Closures with discharging devices other than pumps with pouring spouts or tubes; with discharge nozzles or passages
    • B65D47/061—Closures with discharging devices other than pumps with pouring spouts or tubes; with discharge nozzles or passages with telescopic, retractable or reversible spouts, tubes or nozzles
    • B65D47/063—Closures with discharging devices other than pumps with pouring spouts or tubes; with discharge nozzles or passages with telescopic, retractable or reversible spouts, tubes or nozzles with flexible parts
    • 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
    • B65D47/00—Closures with filling and discharging, or with discharging, devices
    • B65D47/04—Closures with discharging devices other than pumps
    • B65D47/06—Closures with discharging devices other than pumps with pouring spouts or tubes; with discharge nozzles or passages
    • B65D47/10—Closures with discharging devices other than pumps with pouring spouts or tubes; with discharge nozzles or passages having frangible closures
    • B65D47/103—Membranes with a tearing element
    • 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
    • B65D47/00—Closures with filling and discharging, or with discharging, devices
    • B65D47/04—Closures with discharging devices other than pumps
    • B65D47/06—Closures with discharging devices other than pumps with pouring spouts or tubes; with discharge nozzles or passages
    • B65D47/12—Closures with discharging devices other than pumps with pouring spouts or tubes; with discharge nozzles or passages having removable closures
    • B65D47/122—Threaded caps
    • B65D47/123—Threaded caps with internal parts

Definitions

  • the present invention relates to a closure on an upper plate made of sheet metal for a container, consisting of a raised collar with its free edge turned outwards and a plastic insert insert which can be inserted into the collar, the collar consisting of a mainly axially extending, essentially cylindrical, first section and a substantially radially extending flange section and wherein the free edge of the flange section from the surface of the top surface one for the engagement of clinching or rolling tools under the Flange section has sufficient clearance.
  • the present invention also relates to a closure insert made of plastic for biting into container openings with a perforated collar with an outwardly directed projection, the closure insert having a closure base with a U-shaped cross section, the radially outer U-leg on the inside of which has a radially inwardly directed projection has for reaching behind the outward projection on the hole collar of the container.
  • an orientation of the closure is considered, as it is also shown in the figures. That is, the closure opening is made at the top of a container and the perforated collar is pulled up out of the surface of the container.
  • the terms radial or outside and inside as well as axial refer to the hole geometry or the hole axis.
  • an insert socket of the closure insert has on its outside a circumferential projection or also individual projections at intervals, the radial extent of which protrudes beyond the container opening, so that when the closure is pressed into the opening, it is pressed radially inwards and after it has passed Snap the edge of the hole back outwards and lock it behind the edge of the hole.
  • the perforated collar itself as a fastening means, the upper edge of the hole being bent inward, for example, and thus providing a holding means for the latching engagement of corresponding latching cams, as well as the previously described hole edge.
  • the edge of the perforated collar is flanged outwards. This flange edge is usually bent downward by approximately 180 ° or more, so as to form an annular circumferential, hook-shaped projection, behind which the corresponding holding means can snap in or snap in.
  • plastic rings are slipped onto the perforated collar, which have an inwardly projecting bead, the inside diameter of which is smaller than the outside diameter of the turned edge, so that after the ring is forcibly pushed onto the perforated collar, this bead engages behind the turned flange edge.
  • a plastic ring can either be formed in one piece with the closure insert, but can also be designed as a separate part holding the closure insert.
  • a hole is punched out of the top of a sheet metal can and the edge of this hole is pulled out essentially cylindrically from the surface of the top, and finally the free edge of the pulled-out part is bent outwards so that it forms an outwardly facing projection, which can reach behind an inward projection of a locking foot pushed onto the perforated collar.
  • the closure foot is preferably U-shaped in cross section, the diameters of the closure foot and perforated collar being matched to one another such that, when the closure insert is fully assembled, its inner U-leg rests against the inner surface of the perforated collar, while the outer U-leg engages around the perforated collar and the flange part of the closure foot connecting the two U-legs rests on the upper edge of the perforated collar.
  • the edge of the perforated collar is usually flanged to a greater or lesser extent, so that its end section is directed backwards or downwards essentially in the axial direction.
  • the end of the perforated collar is thus bent more or less in a U-shape, the bent-back outer edge forming the aforementioned projection, which is engaged by the inward projection of the outer U-leg of the locking foot.
  • the distance of the last-mentioned, inwardly directed projection from the flange part of the closure foot essentially corresponds to the distance from the upper edge of the perforated collar to its free, rearwardly bent edge, measured in the axial direction.
  • the flange part thus rests on the upper edge of the perforated collar when the projection of the outer U-leg latches directly behind the projection formed by the bent edge of the perforated collar.
  • the closure insert is held on the hole collar not by a plastic ring, but by a metal ring.
  • the closure insert then has, for example, an L-shaped insert socket, one L-leg of which is formed by a cylindrical part which can be inserted into the perforated collar and the other L-leg of which rests on the upper edge of the perforated collar.
  • a likewise U-shaped or U-shaped metal ring with its radial L-leg is placed on this flange of the plastic insert placed, with its second, substantially cylindrical L-leg encompasses the flange of the plastic insert and also the flange edge of the perforated collar and projects downward in the axial direction.
  • This cylindrical part of the metal ring is then either rolled up or clinched in the radial direction with compression of the material, so that it lies firmly beneath the turned-over flange edge on the outside of the cylindrical part of the perforated collar and thus holds the closure insert in a protected manner against any manipulation.
  • the clinching and rolling in of metal rings is more complex and expensive than the insertion of locking plastic rings, but it also offers greater security against manipulation, ie against the opening of the closure, which cannot easily be determined afterwards, by loosening the retaining ring.
  • the desired degree of security against tampering depends on the one hand on the respective contents of the container on which the closure is located, but also on the transport, distribution and sales conditions for the filled containers. If the product is a sought-after scarce commodity and / or very expensive and is also stored unattended for a long time and under inadequate protective conditions, the risk of manipulation is of course greater than if the containers contain an easily available, inexpensive mass-produced product and also distribution channels and Storage are relatively safe.
  • the retaining ring is made of plastic, yields elastically when placed on the perforated collar and latches on the perforated collar or edge of the hole.
  • closures of this type should of course be sealed as well as possible and be easy to assemble for reasons of cost savings.
  • closure insert is described here in connection with a perforated collar formed from metal
  • the closure insert of the present invention can also be placed on other container openings which have a container neck with an outwardly projecting projection.
  • the problems with which the present invention is concerned arise primarily in connection with metal perforated collars.
  • a disadvantage of the known clinch and roll-in closures is that they are used to pull up the perforated collar, to fold the flange edge and to reach behind the downward flanged edge require a relatively large amount of material.
  • a central hole that is only small compared to the final opening diameter can be punched out of the container surface, which is then widened by pulling up and turning over the hole collar. The edge of the hole is stretched the most.
  • the aspect ratio of the material in the region of the hole edge becomes so strong that commonly used materials for such sheet metal packages do not withstand and tear. It is therefore necessary to use special sheets suitable for deep drawing, which are correspondingly expensive.
  • the closure inserts When push-in closures are used, the closure inserts are generally injected into the container openings by automatic sealing machines.
  • the term "bouncing" encompasses all closing processes in which the closure is locked onto the container by axial pressure with suitable counterparts.
  • the closure insert is pushed onto the perforated collar with the cross-sectionally U-shaped closure foot, deforms elastically until the inward projection of the outer U-leg has passed the outward projection of the perforated collar, and then snaps into it Starting position back so that the projections mentioned one after the other latch.
  • the inner diameter of the outer U-leg in the region of its projection is smaller than the outer diameter of the projection or flange of the perforated collar.
  • the present invention is therefore based on the object of designing a closure with the features mentioned in such a way that it can be used either as a clinch closure or as a snap-in closure and at the same time is easy to assemble, the usual requirements for tightness also being to be met and the Closure should cover the widest possible range of opening diameters.
  • the force required for the snap-in should be reduced, so that it can be pushed into corresponding container openings even at very short distances between the projection of the outer U-leg and the flange part without exceeding the generally required limit values, without the secure hold of the Closure on the perforated collar and its sealing engagement can be adversely affected.
  • this object is achieved in that the total length of the perforated collar profile consisting of the first section and the flange section, measured in the axial and radial directions, is less than 6 mm.
  • the flange section therefore extends essentially only in the radial direction and is also kept as short as possible, so that there is sufficient material for the first, essentially cylindrical section of the perforated collar to ensure the axial distance of the flange edge from the container surface, which for attaching the clinch ring and snapping the plastic ring into place.
  • a locking of the plastic ring on the inside of the hole behind the edge of the hole is therefore deliberately not provided in such a closure in order to better ensure the complete emptying of such a container.
  • the length of the perforated collar profile must of course be increased accordingly, typically by about 1 mm.
  • the draw ratio remains low and in any case the perforated collar, due to its relatively short profile length, also protrudes only slightly from the plane of the top of the container. This facilitates the stacking of both the finished containers, which have an upper edge flanged at least at the same height, and the top shelf itself, which are manufactured and stored and transported separately from the containers.
  • the perforated collars which are important for the tightness of the closures, are less exposed to the risk of damage or deformation.
  • the object on which the invention is based is achieved in that at least one recess is provided on the outside of the radially inner leg and / or on the inside of the flange part of the closure foot connecting the U legs and facing the two U legs the radial pushing away of the outer U-leg in the area of its projection facilitates.
  • the total length of the perforated collar profile is only about 5.5 to 6 mm.
  • An embodiment of the invention has proven to be particularly expedient, in which the first, essentially cylindrical section of the perforated collar is flared upwards.
  • the plastic socket inserted into the perforated collar has a slightly larger diameter than the inside of the perforated collar to ensure a sealing engagement between the socket and the perforated collar.
  • a corresponding counterpressure is exerted in the radial direction inwards by a clinching ring or a plastic ring which surrounds the perforated collar from the outside.
  • the conical design of the first section of the perforated collar also has the advantage that the closure is centered more easily when inserted.
  • the clear distance between the edge of the flange section and the surface of the underlying top of the container should be at least 2 mm. In this way, there is sufficient space for clinching tools and for a plastic ring to be pushed on.
  • the flange edge In the radial direction, the flange edge should extend at least 1.5 mm, preferably about 2 mm, beyond the inside diameter of the perforated collar. With a typically used material thickness of approx. 0.3 mm, there is then enough space under the essentially radially extending flange section to engage behind the clinching ring or plastic ring.
  • the flange section is slightly inclined towards the outside. This makes it easier to slide on a plastic ring and offers a more or less linear sealing surface for the flange of the plastic insert. At the same time, the resistance to bending up the flange edge is increased and the flange edge is not bent up beyond the horizontal plane even if it is pressed inwards in the radial direction by attaching the clinch ring or plastic ring.
  • the flange edge has a punch burr on its lower free edge.
  • This embodiment is particularly suitable for use in conjunction with an impacted plastic ring. This is because the plastic ring engages with the lower free edge of the flange edge, the cut surface or flange edge penetrating into the plastic and the plastic ring also being firmly hooked onto the punch burr.
  • the upper edge of the flange edge should be rounded as far as possible. This also makes it easier to slide on a plastic ring. Both the rounded edge and the punching ridge are produced in one and the same punching process. In the known, upwardly drawn perforated collar with the flange section turned outwards, the punching ridge, unless it is largely avoided or otherwise removed, is generally located on the upper edge of the flange edge. For the purposes of the present invention, the punching process must therefore be modified so that the punching burr actually occurs on the lower edge of the flange edge.
  • the plastic insert is suitably adapted to the perforated collar design, the plastic insert having, for example, a connecting piece sealingly engaging with the perforated collar and having an annular circumferential, radial bulge.
  • the axial height of this radial bulge expediently coincides exactly with the axial height of the smallest inner diameter of the perforated collar in the fully assembled closure, so that here the sealing engagement limited to a narrow, annular area takes place with the maximum available contact pressure.
  • a linear sealing engagement occurs through the ring-shaped, radial bulge even if the first section of the perforated collar is exactly cylindrical.
  • the ring-shaped, radial bulge is expediently formed by a double-conical configuration of the outside of the insert nozzle.
  • the lower end of the neck which is conical on the outside, has proven to be very useful for the simple insertion and centering of the plastic insert into the perforated collar.
  • the plastic insert expediently has an L-shaped foot ring, one L-leg of which is formed by an essentially cylindrical socket, the maximum outer diameter of which is slightly larger than the minimum inner diameter of the perforated collar, while the second L Leg is formed by a radial flange which rests on the flange section of the perforated collar and also has essentially the same outer diameter as this flange section.
  • a clinch ring with an L-shaped or U-shaped profile can then be placed on the plastic flange with its radially inwardly projecting leg, while the other L-leg or the outer U-leg surrounds the plastic flange and the perforated collar in a cylindrical shape and is pressed against the outer wall of the first section of the perforated collar by clinching tools, thereby also pulling the plastic flange firmly onto the flange section of the perforated collar and holding it in place.
  • the plastic insert has a U-shaped foot ring in profile, the two U-legs encompassing the inner and outer collar of the hole, the connecting piece forming the inner U-leg in sealing engagement with the inner surface of the first section of the perforated collar stands, while the connecting piece forming the other U-leg has a snap edge which engages behind the flange section of the perforated collar, the web connecting the two U-legs resting on the upper side of the flange section.
  • An embodiment of the invention has proven to be particularly expedient in which the outer connector is flared on its lower inside.
  • This conical widening namely at the smallest possible cone angle, makes it easier to push the plastic ring onto the perforated collar, since the snap edge on the outer connector must inevitably have a significantly smaller inner diameter than the outer diameter of the flange section of the perforated collar and the perforated collar supports the pressure opposes a considerable resistance in the radial direction. Since the outer collar in the axial direction can only be relatively short due to the hole collar, which is not very deep in the axial direction, the cone angle must, however, have a certain minimum size so that the collar actually encompasses the edge of the collar when it is put on.
  • the slightly conical shape of the first section of the perforated collar is also helpful here, since the inner connecting piece in the upper, further part of the perforated collar does not yet lie against the inside of this first section and thus the radial inward pressing of the flange edge no additional resistance.
  • the snap edge of the outer connector preferably has the shape of an annular bead running around the inside of the outer connector.
  • This ring bead opens in profile on its upper side at a right or only a slight obtuse angle on the inner surface of the outer connector and in its lower region merges directly into the conical part of the lower inner wall of the outer connector.
  • the force required to bend the two U-legs apart naturally depends on the starting point of this force, ie on the length of the lever arm between this starting point and a pivot point in the region of the flange part which cannot be exactly defined.
  • the starting point of this force is just the point of contact of the projection of the perforated collar with the (generally conical) inner surface of the outer U-leg below the projection.
  • a recess either in the outer surface of the inner U-leg, which faces the perforated collar, or in the side of the flange part facing the perforated collar, has different effects on the force required to push the projection of the outer U-leg away, depending on the arrangement and size.
  • a weakening of the inner U-leg or the flange part is linked due to a reduced material thickness, so that for this reason alone the maximum force required for radially pushing away the above-mentioned projection is reduced, since the radial pushing away of this projection also always includes an expansion of the flange part and the inner U-leg.
  • the inner U-leg can move radially into this area Move outward when a corresponding pull is exerted on the inner U-leg via the flange part, which results from the pushing away of the projection in the radial direction to the outside.
  • a recess is provided in the flange part, which extends in the axial direction from the surface of the flange part facing the perforated collar into the flange part.
  • an essentially completely circumferential incision is provided on the mentioned inner surface of the flange part.
  • the incision therefore only needs to be essentially completely circumferential, because short interruptions or webs that bridge the incision have no significant influence on the overall displacement of the pivot point.
  • the incision extends in the axial direction at least up to half the thickness of the flange part.
  • the incision can reach a depth that corresponds to 2/3 to 3/4 the thickness of the flange part.
  • the lever for the power arm is extended by a corresponding amount.
  • the thickness of the flange part outside the incision should preferably be between 1.5 and 3 mm.
  • the recess on the inner U-leg is formed by a, in the direction of the flange part, conical tapering of the outside of the inner U-leg, the maximum clear distance between the conically tapered section and the essentially cylindrical inner wall of the perforated collar approximately corresponds to at least the difference in diameter of the projection of the perforated collar to the projection of the outer U-leg.
  • the present invention proves to be particularly expedient if the axial distance of the projection of the outer U-leg to the inner surface of the flange part not covered by a recess is less than 3 mm, preferably less than 2 or even 1 mm. This ensures the play-free hold on the edges of the perforated collar, which are only slightly bent, while at the same time the inner surface of the flange part rests on the upper edge of the perforated collar.
  • the new closure insert can also be used expediently at all other container openings which have an essentially cylindrical connection piece or "perforated collar” with an outward projection, which the inward projection of the outer U-leg or the outer connection piece of the closure insert can reach behind.
  • an embodiment of the invention has proven to be particularly advantageous in which the projection on the inside of the outer U-leg is formed by a double-conical design of this inside.
  • the radius of the inner surface of the outer U-leg decreases continuously, starting from the tip of the projection in the axial direction both towards the flange part and away from the flange part. It is expedient if the decrease in the radius towards the flange part takes place faster than away from it, that is, if in other words the cone angle of the conical section remote from the flange part is smaller than the cone angle of the conical section facing the flange part.
  • the cone angle of the remote section should preferably be at most half the cone angle of the other section.
  • the cone angle is considered to be half the opening angle of a cone with the same side surface inclination.
  • FIGS 13 and 14 two cross sections through complete closures.
  • the perforated collar is generally designated 1 and the closure insert 20.
  • the perforated collar 1 is pulled out of the top panel 4.
  • Continuous casting material of normal quality is used for the sheet metal of the top floor 4.
  • the sheet thickness is approximately 0.3 mm in embodiments already produced in practice, of course, thinner or thicker sheets can also be used.
  • FIGS. 1, 3 and 5 The various embodiments are shown in FIGS. 1, 3 and 5 on a 2: 1 scale, in the remaining figures on a 5: 1 scale. It goes without saying that for the purposes of the present invention, compliance with the dimensions is not important, but the true-to-scale reproduction of specifically produced embodiments makes it easier to quantify the presence of the claimed features in detail.
  • the perforated collar 1 consists of an essentially cylindrical first section 2 and an essentially radial flange section 3.
  • first section 2 is not exactly cylindrical, but slightly conical.
  • the practical cone angle is 5 °, but larger cone angles of up to 20 ° can be regarded as a slight conical widening in the sense of the present application.
  • the flange section 3 also does not run in the exact radial direction, but is slightly inclined to the outside.
  • FIG. 6 further details of the perforated collar 1 are designated and shown.
  • the axial and radial length of the perforated collar profile is the measure which results in FIG. 6 as the total length of the sections 2 and 3, the beginning of the first subsection 2 starting approximately with the cut with the dashed line 14.
  • the raised first section 2 upstream of a stage 11 which, seen in the radial direction, is still essentially within the projection of the radius of the flange edge 16.
  • the step 11 advantageously increases the distance between the flange edge 16 and the top floor 4 without the perforated collar profile having to be lengthened as a result.
  • the radial and axial length of the perforated collar profile is approximately 5 mm.
  • the clear distance between the flange edge 16 and the surface of the top floor 4 is outside the step 11 about 3.5 mm, the step height is about 1 mm.
  • the flange edge 16 extends approximately 2 mm further than the inside diameter of the perforated collar 1.
  • the depth of the undercut resulting from this on the outside of the perforated collar 1 is approximately 1.5 mm. This is sufficient to securely attach a clinching ring to the flange section 3.
  • the inside diameter of the outer connector 8 along the projection 13 must not fall too far below the outside diameter of the flange edge 16 in order to be able to be pushed over the flange edge 16 at all.
  • FIGS 1 and 2 a so-called clinch or roll closure is shown.
  • the foot ring 5 of the closure insert 20 which comes into direct contact with the perforated collar 1, consists of an L-shaped, possibly also U-shaped section, which has an essentially cylindrical connecting piece 6 has essentially radial flange 7.
  • the closure insert 20 is thus first inserted with the foot ring 5 into the perforated collar 1 or placed thereon.
  • a metal ring 12 with a U-shaped cross section is then placed on the flange 7 of the foot ring 5.
  • the pray U-legs of the clinch ring 12 are of different lengths, the outer leg being the longer of the two, which protrudes clearly below the flange edge 16 of the flange section 3.
  • the ring 12 has the position shown in broken lines, after the clinching the longer U-leg is pressed firmly under the flange section 3 onto the perforated collar 1.
  • the flange 7 of the foot ring 5 is pressed onto the flange section 3 from above.
  • the connecting piece 6 has a ring-shaped bulge 9, which is shown separately in FIG. 7 for the second embodiment, but is also present in the embodiment shown in FIGS. 1 and 2.
  • This bulge 9 is the result of a double-conical design of the connector 6, the lower conical profile of the connector 6 serving above all to make it easier to insert and center the plastic insert 20 in the perforated collar 1.
  • the connecting piece 6 is extended in segments beyond the cross-hatched cross section, so that this results in even better centering properties.
  • the sectional plane shown in the figures runs straight between such extensions, these interruptions primarily serving to ensure complete emptying of the container when the closure is tilted down.
  • the particular advantage of the closure according to the invention lies in the fact that the special design of the perforated collar with a relatively low draw ratio and a flange section 3 which is only slightly angled downwards enables both the attachment of a clinching ring 12 and the fitting of a U-shaped foot ring 5 of a closure insert 20.
  • This second possibility is shown in FIGS. 3 and 4, FIG. 7 showing the same closure without the perforated collar 1.
  • the foot ring 5 of this closure insert 20 is U-shaped in profile or in cross section and consists of an essentially cylindrical, but on the outside in turn slightly double conical socket 6, a second outer U-leg 8, which is essentially parallel thereto, and the Connecting web or flange 7.
  • the engagement between the connector 6 or the flange or web 7 and the perforated collar 1 is practically the same as in the embodiment described first.
  • This closure insert 20 ' is also not latched on the inside of the perforated collar but is fastened to the flange section 3.
  • the outer socket 8 has an inwardly projecting bead 13. This is more or less partially circular in cross section, but merges directly on its underside into a weakly conical surface 10 of the outer connector 8, which extends practically to the end of the connector.
  • the bead 13 can also consist of individual interrupted, nose-like projections. The only slightly conical surface 10 allows the foot ring 5 to be pushed onto the perforated collar 1 without too much force and to be pushed over the flange edge 16 with the projection 13.
  • the socket 8 So with the weak conical design of the lower inner surface 10 of the socket 8 this completely surrounds the flange edge 16 when it is pushed onto the perforated collar 1, at least in its lower region, the socket 8 must have a certain axial minimum length, so that for this reason, in this embodiment too, a corresponding distance of the flange edge 16 from the top floor 4 is desirable and an advantage.
  • the flange section 3 is slightly sloping towards the outside and that the upper edge 16 ′′ of the flange edge 16 is rounded.
  • the lower edge 16 'of the flange edge 16 consists of a stamping ridge.
  • the flange edge 16 penetrates into the inner surface of the connector 8 above the projection 13 and holds, among other things. via the punching ridge 16 'the foot ring 5 firmly in place, the projection 13 still providing additional protection against deliberate loosening of the closure insert. So that the flange edge 16 penetrates essentially along its entire circumference into the inner surface of the nozzle 8, the diameter of the inner surface of the nozzle 8 is also smaller above the projection 13 than the outer diameter of the flange edge 16.
  • the comparatively short length of the perforated collar profile makes it possible to produce perforated collars with a finished inner diameter of, for example, only 27 mm, the perforated collar otherwise having all the features shown in the figures.
  • plastic inserts can be attached to the same type of perforated collar, but this type of perforated collar is also suitable for very different, in particular for small diameters.
  • FIG. 8 shows in cross section the edge of a container opening 40, which is designed as a raised perforated collar 1 with an outwardly turned flange edge which, in the sense of the present application, forms a projection or flange 9 pointing outward in the radial direction.
  • a locking foot 5 which appears U-shaped in cross-section, with an inner U-leg 6, an outer U-leg 8 and a flange part connecting the two U-legs 7.
  • Complete closures, consisting of a closure insert 20 and a screwed-on closure cap 41, are shown in axial section in FIGS. 13 and 14, with FIG. 13 only differing from FIG. 3 by the recess 30 shown.
  • the closure inserts 20 essentially consist of an inner closure part 2, which can have different shapes that are not important for the purposes of the present application, and of the closure foot 5 already mentioned and shown in more detail in FIGS. 8 to 12.
  • the position of the closure inserts 20 or the closure feet 5 corresponds to an alignment centered with the container opening 40. Corresponding cuts at any point on the edge of the hole do not differ.
  • the closure insert is pressed with a force acting in the direction of arrow 36 from above with the inner closure part and the inner U-leg 6 into the container opening 40, the perforated collar 1 with the flange 3 being inserted into the U-legs 6, 8 and the flange part 7 formed groove 35 of the locking foot 5 slides into it.
  • the minimum inner diameter of the outer U-leg 8 is defined by the bead-like circumferential projection 13. This inner diameter is smaller by the amount x than the outer diameter of the perforated collar 1, measured on the outer edge of the flange 3 or projection 16.
  • the closure foot 5 Under the action of the force acting in the direction of arrow 36, the closure foot 5 now slides with its inner U-leg 6 into the opening 40 of the container below, the perforated collar 1 simultaneously entering the groove 35 of the closure foot 5.
  • the flange edge 16 comes into contact with the conical surface 10, so that a force is exerted on the surface 10 and the outer U-leg 8 in the radial direction to the outside.
  • the locking foot 5, which is made of an elastic plastic material, provides a certain resistance to this force.
  • the pressure force to be exerted in the direction of arrow 36 essentially depends on the geometry of the closure foot 5, in particular on the cone angle of the surface 10, the diameter difference x of the projections 16 and 13, the material thicknesses of the U-legs 6, 8 and the flange part 7 and the distance of the point of application of the projection 16 on the conical surface 10 to a pivot point in the flange part 7 which cannot be exactly defined, but which is shown in FIG. 8 shown embodiment is in the vicinity of the inner surface 34 of the flange 7.
  • FIGS. 9 and 10 illustrate the bumping in the stages of FIGS. 9 and 10 just discussed for another embodiment of the invention.
  • an incision 30 is provided in the form of a groove running around the entire circumference of the closure foot 5 in the inner surface 34 of the flange part 7, through which the effective lever when the two U-legs 6, 8 are pressed apart further upwards into the area above of the incision 30 is shifted.
  • the pressing apart of the two legs 6, 8 is then linked to a widening of the incision or of the groove 30, as can be clearly seen in FIG. 11.
  • the flange part 7 and the inner U-leg 6 are stretched less when the ring is injected, so that the force required for the injection is reduced in the desired manner.
  • the recess 31 is also provided on the outside of the inner U-leg 6, which, however, as FIG. 11 shows, is only partially used because the inner U-leg 6 in the region of the recess 31 does not come into contact with the perforated collar 1 anyway.
  • the cutout 31 could therefore be less pronounced than in the embodiment described first in accordance with FIGS. 8 to 10 or could be omitted entirely.
  • Fig. 13 shows the implementation of the present invention as an axial section through a bellows closure.
  • the closure insert 20 consists of the closure inner part 22 and the closure foot 5, on the specific embodiment of which the present invention is directed.
  • the inner closure part consists of a bellows which can be pulled out and attached to the inner U-leg 6 and which is connected at its other end to a pouring spout with a screw thread.
  • a screw cap 41 with a bracket 42 is screwed onto this screw thread.
  • the pouring spout is also pulled out of the container opening with the screw cap 41, the bellows being turned outwards.
  • the pouring spout is formed directly by the inner U-leg 6 and the outer leg 8 is extended upwards by a cylindrical holder to form with a snap edge for a snap edge lid.
  • the present closure insert is also not limited to container openings with metal perforated collars, nor to the special perforated collar shapes, as shown above. Rather, the invention is applicable to all closure inserts which are fastened by bumping, ie by the mutual engagement of two projections, one of which is arranged on the inside of a U-leg of a cross-sectionally U-shaped closure foot and the other on the perforated collar or container neck is.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Closures For Containers (AREA)
EP19910120638 1990-11-30 1991-11-30 Fermeture pour récipient métallique et sa douille de fermeture Ceased EP0488420A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE19904038205 DE4038205A1 (de) 1990-11-30 1990-11-30 Verschluss an metallbehaeltern
DE4038205 1990-11-30
DE19914106020 DE4106020A1 (de) 1990-11-30 1991-02-26 Verschlusseinsatz
DE4106020 1991-02-26

Publications (1)

Publication Number Publication Date
EP0488420A1 true EP0488420A1 (fr) 1992-06-03

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EP19910120638 Ceased EP0488420A1 (fr) 1990-11-30 1991-11-30 Fermeture pour récipient métallique et sa douille de fermeture

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EP (1) EP0488420A1 (fr)
DE (3) DE4038205A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005050088A1 (de) * 2005-10-18 2007-04-19 Bericap Gmbh & Co. Kg Kunststoffverschluß und Kombination aus Kunststoffverschluß und Behälteroberseite

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2711359B1 (fr) * 1993-10-20 1995-12-01 Novembal Sa Bouchon de fermeture, dispositif de bouchage comprenant un tel bouchon et emballage comprenant un tel bouchon ou un tel dispositif de bouchage.

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3179280A (en) * 1963-03-13 1965-04-20 R W Shore Mfg Co Inc Closure for containers
CH465427A (fr) * 1966-01-24 1968-11-15 American Flange & Mfg Dispositif de fermeture d'un récipient
FR1577022A (fr) * 1967-08-22 1969-08-01

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3179280A (en) * 1963-03-13 1965-04-20 R W Shore Mfg Co Inc Closure for containers
CH465427A (fr) * 1966-01-24 1968-11-15 American Flange & Mfg Dispositif de fermeture d'un récipient
FR1577022A (fr) * 1967-08-22 1969-08-01

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005050088A1 (de) * 2005-10-18 2007-04-19 Bericap Gmbh & Co. Kg Kunststoffverschluß und Kombination aus Kunststoffverschluß und Behälteroberseite

Also Published As

Publication number Publication date
DE4106020A1 (de) 1992-08-27
DE9113961U1 (de) 1992-02-27
DE4038205A1 (de) 1992-06-04

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