US3301426A - Closure cap - Google Patents

Closure cap Download PDF

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Publication number
US3301426A
US3301426A US373016A US37301664A US3301426A US 3301426 A US3301426 A US 3301426A US 373016 A US373016 A US 373016A US 37301664 A US37301664 A US 37301664A US 3301426 A US3301426 A US 3301426A
Authority
US
United States
Prior art keywords
skirt
cap
slot
tear strip
tearing
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 - Lifetime
Application number
US373016A
Other languages
English (en)
Inventor
Leonard S Kavalus
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.)
American Flange and Manufacturing Co Inc
Original Assignee
American Flange and Manufacturing Co Inc
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 American Flange and Manufacturing Co Inc filed Critical American Flange and Manufacturing Co Inc
Priority to US373016A priority Critical patent/US3301426A/en
Priority to GB22755/65A priority patent/GB1080403A/en
Priority to DE1482520A priority patent/DE1482520C3/de
Priority to FR19588A priority patent/FR1436414A/fr
Priority to DK283765AA priority patent/DK142022B/da
Priority to CH783365A priority patent/CH442053A/fr
Priority to FI651346A priority patent/FI47745C/fi
Priority to AT510565A priority patent/AT273700B/de
Priority to ES0313833A priority patent/ES313833A1/es
Priority to BE664988D priority patent/BE664988A/xx
Priority to NL6507146A priority patent/NL6507146A/xx
Application granted granted Critical
Publication of US3301426A publication Critical patent/US3301426A/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • 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
    • B65D41/40—Caps or cap-like covers adapted to be secured in position by permanent deformation of the wall-engaging parts
    • B65D41/42—Caps or cap-like covers adapted to be secured in position by permanent deformation of the wall-engaging parts made of relatively-stiff metallic material, e.g. crown caps
    • 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
    • B65D2401/00—Tamper-indicating means
    • B65D2401/15—Tearable part of the closure
    • B65D2401/35—Vertical or axial lines of weakness

Definitions

  • closure caps as heretofore devised, formed out of lightweight sheet material and provided with gripping ears to be gripped between the fingers for ready destruction and removal of the caps, and in the me-thod of manufacturing such caps, various problems have arisen.
  • Probably the most serious and most difficult to overcome is the provision of scoring defining a tear strip which will leave sufficient metal of the cap to assure against failure under ythe pressures encountered in capping bottles of fluids, such as beer and soda water, but will stillienable the consumer, by grasping a tearing ear between the thumb and forenger, to pull and thus tear along the score lines with comparative ease so as to destroy the cap and get at the container contents.
  • Uniformity of pull for cap rediameter of the initial blank at the bottom of the skirt to subs-tantially that of the cap top portion Where the skirt departs from the top.
  • the cap and method of forming and lapplying same provides a real and complete solution to this overall problem. ing the stresses and strains right away from the scored area through providing Ian absorption area where -they can spend lthemselves without detracting from any of the advantageous aspects of the cap. It has, in accordance with the invention, surprisingly been found that when the tearear itself.
  • the invention By slotting or removing a relatively narrow elongated portion of the tearing ear and of the tear strip continuing therefrom, the invention has provided a place in which the crowding of the metal of the skirt can be taken up.
  • the invention has also removed the heretofore unappreciated disturbing effects caused by the presence of the It has done so in a manner and by means whose yieldability is such, with regard to the scored part of the skirt, that the deleterious deformation of the scores, as found in the prior art, is substantially eliminated.
  • the cap of the invention when equipped with the scoring designed to leave ⁇ sufficient metal to withstand the pressures imposed on the cap and yet to enable removal to beV effected by a pull within the poundage range acceptable to the public, the cap of the invention, after forming and securing, will perform as designed. Vln addition, it has incorporated in it a sufficient margin of flexibility that, regardless of normal variations in the surface of the con tainer to which the cap is to be applied, the cap of the invention will provide a tight seal and will be easily Y removable in the manner desired.
  • Another object is to provide a novel method for manufacturing such caps.
  • Another object is to provide a novel method for securing such caps over container openings.
  • Still another object of the invention is to provide such caps which though scored for removal by destruction through tearing, Will withstand with a minimum of weakening or variation the action of securing them to container openings.
  • Still another object of the invention is to provide such caps which are uniformly readily removably by destruc tion through tearing by the exertion of pulling power in a range which the public generally is capable of exerting.
  • a further object is to incorporate in such caps safeguards against undesirable variations in their removability resulting from variations in such things as manufacturing, applying and surfaces to which they are applied.
  • a further object is to provide hat scored cap blanks with adequate safeuard to minimize detrimental effects on the scores caused by the drawing of the cap skirt portion away from the top and/ or the subsequent contracting of the cap skirt in the applying of the cap.
  • a further object is to provide such safeguards, whether scored on its internal or external surface.
  • a still further object is to provide such caps with enhanced gripping facility in the tearing ear.
  • FIG. 1 is a bottom plan view of the cap blank for use in forming the closure cap of the presently preferred form of the invention.
  • FIG. 2 is an enlarged fragmentary vertical sectional view taken on line 2-2 of FIG. 1 termed upside down and looking in the direction of the arrows:
  • FIG. 3 is an enlarged fragmentary vertical sectional view taken on line 3 3 of FIG. 1 and looking in the direction of the arrows:
  • FIG. 4 is a front elevational view of the completed cap in accordance with the invention:
  • FIG. 5 is a fragmentary vertical vsectional view taken on line 5 5 of FIG. 4 and looking in the direction of the arrows:
  • FIG. 6 is a front elevational view of the cap of the invention shown as secured in place on a container neck:
  • FIG. 7 is a vertical sectional view taken on lines 7--7 of FIG. 6 and looking in the direction of the arrows:
  • FIG. 8 is a fragmentary perspective view of a cornpleted cap as shown in FIG. 4 taken from the tearing ear side thereof: f
  • FIG. 9 is a similar view but showing the cap as it appears when sealed in place on a container neck or bottle finish as shown in FIG. 6.
  • FIG. 10 is a bottom plan view of a modified form of cap blank:
  • FIG. 1l is a view similar to FIG. 6 of a cap formed from the blank of FIG. 10.
  • FIG. 12 is a View similar to FIG. 1 of a cap blank scored on the opposite surface from that of FIG. l.
  • FIG. 13 is an enlarged fragmentary section taken on line 13 13 of FIG. 12 and looking in the direction of the arrows, and
  • FIG. 14 is a view similar to FIG. 4 but showing an exteriorly scored cap as formed from the blank of FIG. 12.
  • the cap generally indicated at 1 comprises a flat disc-like top 2, surrounded by a depending skirt 3 with the juncture of the top and skirt being indicated at 4.
  • the skirt 3 terminates in a downwardly facing free end edge S, which edge, except for the portion from which the gripping ear 6 extends, forms a complete circle.
  • the ear 6 extends directly downwardly from the skirt for a ⁇ short distance in a neck portion 7 and then turns radially outwardly on a somewhat ydownward incline away from the cap.
  • the ear side edges 8 and 9 taper slightly inwardly toward each other throughout their extent from the free edge of the skirt to their rounded ear end portion 10.
  • the cap 1 has either i-ts interior surface a or exterior surface b as desired, scored along a pair of lines.
  • the score lines may also follow any particular pattern in their extent across the cap, such as diverging outwardly away from each other in either curved or straight lines.
  • the scoring of the cap of FIGS. 4 and 5 is shown as being formed into the interior surface a ⁇ of the cap and as having portions 11 and 12 which extend across the cap top and .portions 13 and 14 which extend across the skirt 3 lying in substantially parallel relationship as shown in FIGS. 1 and 4. Accordingly a tear strip 15 is formed between the scores as a continuation of the ear-6 which tear strip extends a substantialdistance across the cap.
  • the completed cap blank 20, from which thecap of FIGS. 4 and 5 is made, is shown in full in the bottom plan view of FIG. l. Enlargedsectional fragments of it are shown in FIGS. 2 and 3 with FIG. 2 being turned upside down from the showing in FIG. 1.
  • the blank 20. is seen to be notched at 21 and 22 at the juncture of the ear sides 8 and 9 with the blank periphery 5. Most important, however, is the fact that the ear 6 has .a strip of metal lpunched out of it to form an elongated opening 23, which is shown ⁇ here as a slot having parallel sides 24 and 2&5 and inner and outer curved ends 26 and 27 respectively. Looking at the flat blank of FIG.
  • the elongated slot 23 is seen to have its longitudinal center line coincide with the longitudinal axis of theear 6.
  • the inner end 26 of the slot extends radially inwardly -to a position slightly beyond the innermost extent of the notches 21 and22.
  • the slot 23 extends inwardly so as to lie between the score lines 13 and 14 just inwardly of the position where those score lines meet the notches 21 and 22.
  • the position of the outer end 27 of the slot 23 is not as signicant as that of the inner end 26 and is shown as being in the portion of the ear 6 which is suitably embossed at 6a to facilitate gripping.
  • elongated opening 23 has been shown and described as a slot having parallel sides it is to be understood that the invention is not limited thereto. Elongated openings of different shape, so long as they are capable of serving the intended purpose, are encompassed within the invention.
  • the next step in the forming of the cap of the invention is the cupping or drawing operation wherein the peripheral skirt portion 3 of the flat blank 20 is drawn laterally with respect to the central or top portion 2.
  • the result of this is depicted in FIGS. 4, 5 and 8.
  • the metal of the skirt portion 3 is rather severely worked or crowded by the varied reduction of its diameter from the turning line 4 out to the blank periphery 5 as the skirt portion is moved into lateral position.
  • the metal in the part of the skirt from which th ear extends is placed under considerably greater stress than the remainder of the skirt.
  • FIGS. 4 and t8 one can see how the provision and position of the elongated opening or slot 23provide the solution to the prior art problems.
  • This is rather graphically illustrated by the shape which the slot 23 has taken in FIGS 4 and 8 as distinguished from its initial form in the blank of FIG. 1.
  • the side walls 31 and 32 of the slot have yielded to the stress created in the whole of the skirt and particularly in the portion thereof from which the ear extends in the foi-ming of the skirt out of the that.
  • the top part of the slot at 30, as viewed in FIG.v 4 is closed in into somewhat of a point instead of being rounded as seen at 26 in FIG. 1.
  • the slot is narrowed with its sides 31iand 32 being movedy in toward each other down through the neck portion 7 of Ithe ear to about the position 7a where the ear bends laterally. Going kback to ⁇ FIG. 4 it is seen that the top 30 ofthe slot lies substantially above a horizontal line passed through the lower end portions of the scorelines. This then assure thatpat vtheioutset, there is any open slot lying in opposition to the position where ,the slits 21 and 22 are closedup'and also in opposition to the position where the scores 28 and y29 commence. The fact that this slot has been narrowed shows graphically that the stress in the skirt in the'i'zone of these positions is taken up in collapsing the sides of the slot toward each other.
  • the portions 'of the skirt which have been thinned vdown in the scoring are less capable of resisting the distortive forces' created by the stress in the skirt than is ⁇ the lunscored portion
  • the scored portions are, never- 4theless, able to resist those forces t'o agreater extent than are the side walls of the slot.
  • the forces are transmitted to and act upon the walls ofthe slot clos-v ing the same up to a certain extent.
  • FIGS. 6, 7 and 9 The cap 1, as indicated in FIG. 4, has of course been provided with a suitable lining or gasket as indicated at 40, which, as seen in FIG. 7, is sealingly engaged with the bottle bead or finish 51, being deformed and spread ⁇ over that finish in the course of the securing action.
  • a suitable lining or gasket as indicated at 40, which, as seen in FIG. 7, is sealingly engaged with the bottle bead or finish 51, being deformed and spread ⁇ over that finish in the course of the securing action.
  • the securing of the cap calls for further reduction of the diameter of the previously formed skirt. Also this reduction will normally be in stepped annular zones since the skirt of the cap will be drawn in under-y dustry, the cap of the invention can be satisfactorily secured to a variety of other finishes.
  • the inward forming of the portions 45 and 46 of the skirt 3 which, of course, includes the neck portion 7 of the tearing ear, a strip 47 of which is inclined inwardly the same as the portion 45, is preferably achieved by the use of spinning rollers which move the metal inward progressively. This, of course, further reduces the radius of the inwardly formed skirt portions additionally.
  • FIGS. 6 and 9 it will be seen, however,
  • the shape of the slot illustrates the manner in which the forces act down through the commencing portion, or neck, 7 of the tearing ear. As seen, these forces act to close in the slot to a position a little below the bead and then still close in the sides of the slot on the inclines as seen bythe sides 42 and 43.
  • FIGS. l and 1l a modified form of slot is shown and indicated generally at 60.
  • the slot 60 is shown as having an inner end 61 and a pair of elongated sides 62 and 63 which structure coincides with the slot 23 in FIGS. 1 to 9.
  • the outer end of the slot 60 differs from the previous showing by opening up into a bulbous portion 64, forming the center portion of the gripping embossing 6a.
  • the inner end portion of the slot 60 substantially closes up into a slit 65 from which the sides 66 and 67 diverge to the enlarged bulbous end portion 64.
  • the bulbous portion 64 serves to enhance the grip that may be achieved on the tearing ear by the consumer.
  • FIGS. l2, 13 and 14 the application of the invention to a cap provided with scores on its exterior surface b, b rather than onits interior a, a is illustrated.
  • the blank 70 is the same as the blank 20 of FIG. l, the only difference being that the skirt 73 isformed downwardly from the circular top portion 72 about the bend line 74 so as to leave the score lines 75 and 76 extending into the metal from the outside instead of from the inside of the cupped blank.
  • the scorre lines may extend in various directions, such as, but Without limitation to, sweeping inwardly toward each other on convex curves, or as straight lines diverging or converging as they extend across the blank from the tearing ear, but for simplicity of illustration the score lines 75 and 76,'as here shown, extend in parallel relationship across the blank.
  • the scores 75 and 76 are seen to have short portions 13a and 14a which extend down the skirt defining the skirt portion of the tear strip 15a.
  • the portions 13a and 14a terminate at positions 28a and 29a closely adjacent the position where the notches 21a and 22a form closed slits.
  • Caps formed in accordance with the invention with a strain absorptive elongated opening in the ear, have been found to perform as designed when secured to various bottle finishes. In the first place the retention of high pressure is not interfered with since the upper end of the elongated slot, in each instance, lies below the gasket and is, in any event, substantially closed up in the securing of the cap to the bottle. The scores, however, are left sufficiently undisturbed to enable one with a normal, or even less than normal, grip to start the teatr and complete the tearing within the range of the ⁇ few pounds pull which bottle users are readily able to exert.
  • a lightweight metal closure cap adapted to bel secured over a lip bordering the opening of a container neck, said cap comprising a disc-like top portion, a laterally depending skirt therearound having a smooth cylindrical surface terminating in a substantially circular lowermost free edge, a pair of weakened tearing lines extending across said cap skirt and into said top portion, saidlines defining a tear strip therebetween forming an integral part of said cap skirt and top portion, said tear strip extending downwardly away from said free edge in a short extension of said skirt and then extending radiallyoutwardly away from said skirt in a gripping portion to facilitate tearing, a radially elongated slot formed in said tear strip, said slot disposed within said short extension of said tear strip whereby severe distortion of said Vweakened lines is protected against through deformation of said slot which deformation reduces the resistance offered by said short skirt extension of said tear strip to circumferential movement of metal in said skirt during initial forming and subsequent applying of said cap.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Closures For Containers (AREA)
US373016A 1964-06-05 1964-06-05 Closure cap Expired - Lifetime US3301426A (en)

Priority Applications (11)

Application Number Priority Date Filing Date Title
US373016A US3301426A (en) 1964-06-05 1964-06-05 Closure cap
GB22755/65A GB1080403A (en) 1964-06-05 1965-05-28 Improvements relating to closure caps and methods of manufacturing such caps
FR19588A FR1436414A (fr) 1964-06-05 1965-06-04 Perfectionnements aux capsules de fermeture en métal léger pour récipients, et àleur procédé de fabrication
DK283765AA DK142022B (da) 1964-06-05 1965-06-04 Letvægts-lukkehætte af metal.
CH783365A CH442053A (fr) 1964-06-05 1965-06-04 Capsule de fermeture métallique
FI651346A FI47745C (fi) 1964-06-05 1965-06-04 Suljin.
DE1482520A DE1482520C3 (de) 1964-06-05 1965-06-04 Leichtmetall-Verschlußkappe für Behälter
AT510565A AT273700B (de) 1964-06-05 1965-06-04 Verschlußkappe für Behälter sowie Rohling und Verfahren zu ihrer Herstellung
ES0313833A ES313833A1 (es) 1964-06-05 1965-06-04 Perfeccionamientos en capsulas de cierre.
BE664988D BE664988A (de) 1964-06-05 1965-06-04
NL6507146A NL6507146A (de) 1964-06-05 1965-06-04

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US373016A US3301426A (en) 1964-06-05 1964-06-05 Closure cap

Publications (1)

Publication Number Publication Date
US3301426A true US3301426A (en) 1967-01-31

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ID=23470572

Family Applications (1)

Application Number Title Priority Date Filing Date
US373016A Expired - Lifetime US3301426A (en) 1964-06-05 1964-06-05 Closure cap

Country Status (11)

Country Link
US (1) US3301426A (de)
AT (1) AT273700B (de)
BE (1) BE664988A (de)
CH (1) CH442053A (de)
DE (1) DE1482520C3 (de)
DK (1) DK142022B (de)
ES (1) ES313833A1 (de)
FI (1) FI47745C (de)
FR (1) FR1436414A (de)
GB (1) GB1080403A (de)
NL (1) NL6507146A (de)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3774797A (en) * 1971-11-26 1973-11-27 J Vliet Bottle cap closure
US3937349A (en) * 1974-09-11 1976-02-10 Shih Chen Hsu Self-opening crown cap
US3958710A (en) * 1970-04-14 1976-05-25 Aktiebolaget Wicanders Korkfabriker Bottle cap with gasket
US3985255A (en) * 1975-10-10 1976-10-12 Blair Richard L Bottle cap
US4055267A (en) * 1976-09-13 1977-10-25 Blair Richard L Cap for a widemouthed container
US4564116A (en) * 1981-04-10 1986-01-14 Folienwalzwerk Bruder Teich Aktiengasellschaft Closure cap for beverage containers
US20050230342A1 (en) * 2002-07-11 2005-10-20 Enrico Folchini Tamperproof closing element for beverage containers

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA950403A (en) * 1969-03-05 1974-07-02 American Flange And Manufacturing Co. Inc. Tear-out panel closure seal
ES194290Y (es) * 1970-04-06 1975-03-16 American Flange Capsula de cierre de metal ligero.

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1239238A (en) * 1914-06-03 1917-09-04 Ernest V White Bottle-cap.
GB486544A (en) * 1936-12-21 1938-06-09 Oscar Strome Improvements relating to crown cork closures for bottles and other containers
US2186519A (en) * 1938-09-14 1940-01-09 Geo V Clark Co Inc Manufacture of closures for containers
US3130056A (en) * 1961-07-06 1964-04-21 American Can Co Container and sealing cap assembly filled with an aqueous comestible

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1239238A (en) * 1914-06-03 1917-09-04 Ernest V White Bottle-cap.
GB486544A (en) * 1936-12-21 1938-06-09 Oscar Strome Improvements relating to crown cork closures for bottles and other containers
US2186519A (en) * 1938-09-14 1940-01-09 Geo V Clark Co Inc Manufacture of closures for containers
US3130056A (en) * 1961-07-06 1964-04-21 American Can Co Container and sealing cap assembly filled with an aqueous comestible

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3958710A (en) * 1970-04-14 1976-05-25 Aktiebolaget Wicanders Korkfabriker Bottle cap with gasket
US3774797A (en) * 1971-11-26 1973-11-27 J Vliet Bottle cap closure
US3937349A (en) * 1974-09-11 1976-02-10 Shih Chen Hsu Self-opening crown cap
US3985255A (en) * 1975-10-10 1976-10-12 Blair Richard L Bottle cap
US4055267A (en) * 1976-09-13 1977-10-25 Blair Richard L Cap for a widemouthed container
US4564116A (en) * 1981-04-10 1986-01-14 Folienwalzwerk Bruder Teich Aktiengasellschaft Closure cap for beverage containers
US20050230342A1 (en) * 2002-07-11 2005-10-20 Enrico Folchini Tamperproof closing element for beverage containers

Also Published As

Publication number Publication date
NL6507146A (de) 1965-12-06
AT273700B (de) 1969-08-25
ES313833A1 (es) 1966-03-01
BE664988A (de) 1965-10-01
DE1482520C3 (de) 1974-04-04
FR1436414A (fr) 1966-04-22
DE1482520B2 (de) 1973-08-23
CH442053A (fr) 1967-08-15
DK142022B (da) 1980-08-11
DK142022C (de) 1980-12-29
FI47745C (fi) 1974-03-11
FI47745B (de) 1973-11-30
GB1080403A (en) 1967-08-23
DE1482520A1 (de) 1969-02-13

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