US3685677A - Press-on, twist-off tamper indicating closure cap - Google Patents

Press-on, twist-off tamper indicating closure cap Download PDF

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Publication number
US3685677A
US3685677A US94367A US3685677DA US3685677A US 3685677 A US3685677 A US 3685677A US 94367 A US94367 A US 94367A US 3685677D A US3685677D A US 3685677DA US 3685677 A US3685677 A US 3685677A
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US
United States
Prior art keywords
cap
ring
skirt
thread
finish
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
US94367A
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English (en)
Inventor
James E Westfall
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.)
Continental Can Co Inc
Original Assignee
Continental Can 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 Continental Can Co Inc filed Critical Continental Can Co Inc
Application granted granted Critical
Publication of US3685677A publication Critical patent/US3685677A/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
    • B65D41/34—Threaded or like caps or cap-like covers provided with tamper elements formed in, or attached to, the closure skirt
    • B65D41/348—Threaded or like caps or cap-like covers provided with tamper elements formed in, or attached to, the closure skirt the tamper element being rolled or pressed to conform to the shape of the container, e.g. metallic closures
    • 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
    • B65D41/0435—Threaded or like caps or cap-like covers secured by rotation with separate sealing elements
    • B65D41/0457—Threaded or like caps or cap-like covers secured by rotation with separate sealing elements the sealing element covering or co-operating with the screw-thread or the like of a container neck
    • 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
    • B65D2401/50—Tamper-band co-operating with intermediate ring connected to the container

Definitions

  • a tamper-indicating closure is provided of a type wherein a closure cap having a side liner is pushed onto a threaded finish so as to form complementary threads in the liner for twistably removing the cap.
  • a resiliently expansible plastic ring is held in the cap skirt against rotation and endwise movement relative thereto.
  • An intumed lip on the ring engages under a collar on the finish below the threads when the cap is pushed on. The edge of the lip also engages serrations around the finish.
  • Tamper-resistant caps are popular for-beverage bottles, such as used for alcoholic and various carbonated beverages. There is also a demand for tamper-indicating caps on other bottles or containers which are a frequent target of contents pilferage, such as antifreeze jugs or cans.
  • a number of designs fortamper-proof" or tamperindicating closure caps have been heretofore proposed. Some have met with substantial success.
  • One such is an aluminum cap which can be pushed over a threaded finish to seal against the container lip, the threads being then rolled in the cap skirt in conformity with the finish threads to form a twistably removable closure.
  • the cap is provided with a weakening bank around the skirt below the threads. The marginal portion of the skirt below the weakening band is turned in under a shoulder on the finish, engages with lugs therein, or is otherwise engaged with the neck or shoulder of the bottle to inhibit twist-off. When torque is applied to unscrew the cap, the skirt ruptures at the weakening ban, providing a readily visible telltale of opening or attempt thereat.
  • Such fracture-band telltale is particularly desirable for pressurized or vacuumized containers, as in the case of carbonated beverage bottles, baby food jars, and the like, since tampering is evident even when the cap has been twisted only such slight amount as may disturb the seal and cause spoilage.
  • the bottle or jar finish is provided with external threads or equivalent retention means.
  • a collar below the threads defines a downwardly facing shoulder.
  • the closure cap according to this invention is characterized by a generally cylindrical skirt, the upper portion of which is adapted for formation of thread therein upon the application of an axial force which also effects a seal of the opening and engaging the twist-off inhibition means with cooperating means on the container neck.
  • the preferred form of the closure cap comprises a shell having a top panel and a skirt depending therefrom.
  • the generally cylindrical upper portion of the skirt has a plastic liner adapted for wedging over the finish threads when the skirt is telescoped over the finish, thereby conforming the liner to the finish threads and effecting a side seal supplementing the top seal effected by liner material inside the cover panel compressed against the container lip.
  • Such means and method of effecting thread engagement and seal are inside diameter of the flange being normally smaller than the outside diameter of the aforementioned collar.
  • the shell skirt and the outer wall of the ring are provided with closely matched corrugations, obviating relative rotation of the two parts.
  • the ring is also close ly held between the intumed lip of the skirt and an opposing shoulder, preventing relative endwise movement. After'the ring is inserted into the skirt, then the lip is formed over the ring to hold the ring in place prior to sealing.
  • the neck is provided with a circumferential series of serrations.
  • the ring is so positioned in the cap that the inwardly extending flange rides over the collar on the container as the cap is pushed on and then snaps under the downwardly facing shoulder when the cap in the sealed and thread-engaging position is on the finish.
  • the finish serrations bite into the inner edge of the intumed flange, inhibiting rotation of the ring and the shell.
  • the ring may be made of a brightly colored plastic, or bear insignia serving to attract attention, improving its visibility as a telltale of the attempted or actual opening of container even through the upper shell has not been removed, or has been replaced.
  • FIG. 1 is a partial elevation of a jar, showing the neck and finish portion thereof with a closure according to this invention
  • FIG. 2 is a partial cross-sectional view of the closure cap shown in FIG. 1, before application of the cap to the finish;
  • FIG. 3 is a partial horizontal sectional view taken on line 33 of FIG. 2, showing the anti-rotation interlock of the ring insert and the shell skirt;
  • FIG. 4 is a partial elevational view of the neck of the jar shown in FIG. 1, showing details of the finish thereof;
  • FIG. 5 is a partial horizontal sectional view taken on line 5-5 of FIG. 4, showing the condition of the closure when sealed;
  • FIG. 6 is a partial vertical sectional view with the closure added and showing the anti-rotation serrations under the finish collar provided for engagement of the insert l'lng.
  • FIG. 1 shows the top of a jar 10 provided with a closure according to this invention.
  • Closure cap 11 includes a shell having a top panel 12 and a skirt 13. The
  • upper portion 14 of skirt 13 is generally cylindrical.
  • the lower portion 15 is somewhat larger and generally bell-shaped. Skirt portion 15 has a weakening band 16 of the frangible-bridge type, such as that shown in U. S. Pat. No. 3,484,012 issued to Robert P. White and Charles N. Foster on Dec. 16, 1969.
  • FIG. 2 which shows the internal structure of cap 11 before application to the jar
  • the top panel 12 and upper skirt portion 14 are provided with a liner 18 having a top seal portion 19 and a side-seal and thread engagement portion 20 extending substantially the full length of skirt portion 14.
  • Liner 18 is preferably made of plastomeric material, formed substantially in accordance with the description of such liners in the aforesaid patent, serving the same purpose in the closure cap of this invention.
  • the bell portion of 14 comprises a generally horizontal flange portion 21 defining shoulder 22, cylindrical portion 23 extending therefrom and including the weakening band 16. There is another horizontal, outwardly extending flange 24 from which depends the substantial vertical flange portion 25. Flange portion 25 terminates in the inturned lip 26.
  • Bell portion 15 constitutes a cage for retaining the insert ring 27.
  • ring 27 serves to inhibit rotation and rise of the cap relative to the finish, after the cap has been secured in sealing position on the container. Accordingly, ring 27 is held in bell portion 15 in such manner that there can be no relative rotation between ring 27 and the skirt 13 while the weakening band 16 remains intact.
  • ring 27 is splined in skirt portion 15 as best seen in FIGS. 2 and 3.
  • a number of corrugations 30 are formed in the lowermost vertical flange portion 25 of the skirt, defining alternating axial ridges and flutes.
  • the number of corrugations are selected according to the size and material of the cap, but the corrugations are preferably of such number and flute depth as to provide a general stiffening effect to the lower portion of the cap skirt and most particularly a sufficient resistance to deformation to withstand the torque necessary to fracture the bridges.
  • the outside diameter of the barrel 33 of ring 27 at its upper end is somewhat less than the inside diameter of the surrounding portion of the cap skirt, so that the flange 32 can be expanded in a manner and for the purpose subsequently shown.
  • the skirt bell portion 15 is formed with its lip portion 26 initially vertical and its inside diameter slightly larger than the outside diameter of ring 27 across the ribs 31. Ring 27 is pushed into the bell and held with its upper face 28 pressed against the shoulder 29. The lip 26 can then be crimped, spun, or rolled in tight against the lower face of ring 27 so that there is no end play between the ring and the shell. In order to obviate rotational slack, it is desirable that the ribs 31 or ring 27 be a close fit in the flutes of corrugations 30.
  • FIG. 4 shows the neck and finish of the jar 10 and FIG. 6 shows the cap 11 applied thereto to complete the closure.
  • the finish includes external threading 34.
  • the thread comprises about two-thirds turn, but it will be understood that compound or partial threads or cam lugs may be used, if desired. Finishes with threading or the like, particularly suitable for wide-mouth jars are shown in the patent to White, mentioned above. Such twist-off arrangements provide desirable quickremoval and reclosure features, yet have good retention characteristics.
  • a collar 35 is provided immediately below the thread 34.
  • the outside diameter of collar 35 is about the same as the major diameter of thread 34, or slightly larger.
  • Collar 35 defines a downwardly facing shoulder 37.
  • Another collar 38 slightly larger in diameter than collar 35 and spaced therefrom, defines an upwardly facing shoulder 39 opposing shoulder 37.
  • a circumferential series of equally spaced serrations or ribs 40 extend between shoulders 37 and 39, the ribs being quite sharply pointed as best seen in FIG. 5.
  • the completed closure shown in FIG. 6, is effected by pushing cap 11 over thread 34, compressing the plastomeric material of the side liner into conformity with the thread 34.
  • the side liner material has the characteristics of taking a set under the high pressure exerted thereon, whereby the female thread therein becomes permanent within the time elapsing between closing and delivery to the ultimate consumer.
  • the flange 32 of ring 27 is so positioned as to lie opposite the space between the finish shoulders 37 and 39 when cap 11 is telescoped over the finish the amount required to form the seal and the threading in the liner thereof as above described.
  • the expansible flange 32 rides over the threads and collar 35 and then snaps into position snug under shoulder 37, shoulder 39 serves as a stop to obviate overtravel.
  • the stroke and pressure relief of the tooling are adjusted accordingly, as well understood by those skilled in the capping tool art.
  • the diameter across the crests of ribs 40 is larger than the normal inside diameter of flange 32, so that contractive force of the resilient flange forms complementary grooves therein, seizing the flange to the serration ribs and positively inhibiting rotation of the ring 27 relative to the finish.
  • ring 27 is non-rotatably and non-shiftably held in the bell of skirt 13. Accordingly, twist-off torque applied to the upper shell portion 14 over-stresses the bridges 41, rupturing them. Thereafter, the upper or prime cap portion 11 can be twisted off. In the weakening band design shown, shearwise elongation of the bridges 41 is negligible, so that rupture occurs substantially without rotation of the cap relative to the finish. Accordingly, the seal cannot be substantially disturbed upon attempting to twist the cap, except by rupturing the bridges. The portion of the bell below the bridges drops, exposing the lower portion of ring 27.
  • the ring may be made of brightly colored plastic, or have indicia along the lower edge, to provide a telltale supplemental to that of bridge fracture.
  • the preferred embodiment above described incorporates both anti-rotation and anti-rise features.
  • the cap shell will be severed due to tension imposed on the bridges by inhibition of rise.
  • ring 27 is more resistant to deformation by twist than by tension imposed by axial restraint, so that the primary rupture forces are shear forces tangential to the weakening band 16. This is the preferred rupture mode for the type of weakening shown.
  • the anti-rise provision alone may be found suflicient in some applications, in which case some modification to the parts may be desirable.
  • the ribs 40 can then be omitted.
  • a somewhat thicker anchor flange 32 than that shown may also be desira ble.
  • the barrel of the ring can be made of stiff material, somewhat heavier wall or both, in order to minimize axial elongation, either locally or generally.
  • the style of shell shirt weakening may be employed which will effect rupture with minimal axial elongation, as for example, by sharply scoring or necking the material continuously around the skirt.
  • Use of relatively high temper stock for the cap shell can also serve this purpose.
  • Aluminum is a preferred material for the shell of cap 11 above shown and described. Such material is preferred because of its good finish, ease of formation by bending, drawing, spinning, or rolling, high corrosion resistance and facility of attractive decoration. Because the threads are formed in the plastic side liner without deformation of the shell, the sometimes unsatisfactory creep and warp characteristics involved with threads formed in thin aluminum are not a factor affecting performance of the preferred form of cap.-
  • skirt thread formation may be used, with or without the side liner, for example, roll-on, squeeze or crowning techniques.
  • Various types and styles of top seal liners or gaskets may be used in lieu of the preferred type shown herein.
  • a closure cap for a container finish having an external thread means and a first collar defining a downwardly facing shoulder around the top of the container below said thread;
  • said cap comprising a top panel and a skirt depending therefrom;
  • said skirt including a generally cylindrical upper portion adapted for conformation to the finish thread and a lower bell portion of larger diameter than 1 said upper portion;
  • said ring having a resiliently expansible inward flange normally of smaller inside diameter than said collar and being positioned in said bell portion for engagement with said lip under the downwardly facing shoulder under the thread when said cap is telescoped over the finish;
  • a container having a finish with external thread formation thereon plus a collar thereon below said thread formations defining a downwardly facing first shoulder with ribs extending parallel to the side of said container under said downwardly facing first shoulder;
  • a closure cap having a shell including a top panel and a generally cylindrical skirt depending therefrom;
  • said skirt including a lower bell portion having corrugations around its lower portion
  • said insert including an inward flange engaged under said shoulder and a series of corrugations on the exterior surface of said insert dovetailing with cor rugations of said lower bell portion;
  • frangible weakening means in said lower portion said upper portion being free of said insert upon fracture of said weakening means when rotational pressure applied to said upper portion unscrews said upper portion to cause rupture of said weakening means while said ring insert is prevented from rotating by said ribs on said container and said lower portion below said weakening means separates from said upper portion.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Closures For Containers (AREA)
US94367A 1970-12-02 1970-12-02 Press-on, twist-off tamper indicating closure cap Expired - Lifetime US3685677A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US9436770A 1970-12-02 1970-12-02

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US3685677A true US3685677A (en) 1972-08-22

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US94367A Expired - Lifetime US3685677A (en) 1970-12-02 1970-12-02 Press-on, twist-off tamper indicating closure cap

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US (1) US3685677A (enExample)
CA (1) CA965734A (enExample)
DE (1) DE2142297C2 (enExample)
FR (1) FR2116450B1 (enExample)
ZA (1) ZA711980B (enExample)

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3930588A (en) * 1973-02-13 1976-01-06 Le Bouchage Mecanique Bottle cap
US4131212A (en) * 1977-03-28 1978-12-26 Airfix Industries Limited Containers
US4602718A (en) * 1985-05-31 1986-07-29 Sun Coast Plastics, Inc. Dual-operation tamper-evident band for closures
US4628669A (en) * 1984-03-05 1986-12-16 Sewell Plastics Inc. Method of applying roll-on closures
US4709825A (en) * 1982-09-15 1987-12-01 Owens-Illinois Closure Inc. Press-on twist-off closure for container
US4736857A (en) * 1986-11-14 1988-04-12 American Home Products Corporation Tamper indicating closure
US4813557A (en) * 1984-03-05 1989-03-21 Sewell Plastics Inc. Pasteurizable container closure
US4863030A (en) * 1988-08-01 1989-09-05 Anchor Hocking Corporation Press-on, twist-off plastisol-lined metal closure
US4981230A (en) * 1990-03-15 1991-01-01 Continental White Cap, Inc. Composite cap including tamper indicating band
GB2233635A (en) * 1989-07-14 1991-01-16 A C I Australia Ltd Container
US5027964A (en) * 1989-08-14 1991-07-02 Continental White Cap., Inc. Closure with drop down tamper indicating band and related container finish
US5511677A (en) * 1995-03-30 1996-04-30 The Procter & Gamble Company Container having a tamper evidency system
US5692628A (en) * 1996-01-11 1997-12-02 Rexam Closure, Inc. Press-on screw-off self-tapping closure/container package
US20060266727A1 (en) * 2003-05-13 2006-11-30 Alcoa Deutschland Gmbh Bottle seal
US20100012670A1 (en) * 2008-07-21 2010-01-21 Mark Massey Dispensing lid for container
US9694948B1 (en) * 2016-06-03 2017-07-04 Inostrannoje Proizvodstvennoe Unitarnoje Predpriyatie “Alcopack” Closure device for bottle
US20170305615A1 (en) * 2014-10-07 2017-10-26 Stanpac Inc. Tamper Evident Lid and Method of Making Same

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU516094B2 (en) * 1977-12-14 1981-05-14 Metal Closures Group Limited Closures for containers

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3441161A (en) * 1967-03-09 1969-04-29 Paul S Van Baarn Bottle cap
US3460703A (en) * 1967-07-18 1969-08-12 Aluminum Co Of America Container and closure
GB1188075A (en) * 1967-10-16 1970-04-15 Guala Angelo Closure for Bottles

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2124874A (en) * 1934-05-04 1938-07-26 Colt S Mfg Co Container closure means
DE1139403B (de) * 1959-01-23 1962-11-08 Werner Warsawsky K G Schraubkappe mit Sicherung
US3270904A (en) * 1964-05-21 1966-09-06 Continental Can Co Press-on turn-off cap
US3484012A (en) * 1968-01-22 1969-12-16 Continental Can Co Tamper-proof package

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3441161A (en) * 1967-03-09 1969-04-29 Paul S Van Baarn Bottle cap
US3460703A (en) * 1967-07-18 1969-08-12 Aluminum Co Of America Container and closure
GB1188075A (en) * 1967-10-16 1970-04-15 Guala Angelo Closure for Bottles

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3930588A (en) * 1973-02-13 1976-01-06 Le Bouchage Mecanique Bottle cap
US4131212A (en) * 1977-03-28 1978-12-26 Airfix Industries Limited Containers
US4709825A (en) * 1982-09-15 1987-12-01 Owens-Illinois Closure Inc. Press-on twist-off closure for container
US4628669A (en) * 1984-03-05 1986-12-16 Sewell Plastics Inc. Method of applying roll-on closures
US4813557A (en) * 1984-03-05 1989-03-21 Sewell Plastics Inc. Pasteurizable container closure
US4602718A (en) * 1985-05-31 1986-07-29 Sun Coast Plastics, Inc. Dual-operation tamper-evident band for closures
US4736857A (en) * 1986-11-14 1988-04-12 American Home Products Corporation Tamper indicating closure
US4863030A (en) * 1988-08-01 1989-09-05 Anchor Hocking Corporation Press-on, twist-off plastisol-lined metal closure
GB2233635A (en) * 1989-07-14 1991-01-16 A C I Australia Ltd Container
US5027964A (en) * 1989-08-14 1991-07-02 Continental White Cap., Inc. Closure with drop down tamper indicating band and related container finish
US4981230A (en) * 1990-03-15 1991-01-01 Continental White Cap, Inc. Composite cap including tamper indicating band
US5511677A (en) * 1995-03-30 1996-04-30 The Procter & Gamble Company Container having a tamper evidency system
US5692628A (en) * 1996-01-11 1997-12-02 Rexam Closure, Inc. Press-on screw-off self-tapping closure/container package
US20060266727A1 (en) * 2003-05-13 2006-11-30 Alcoa Deutschland Gmbh Bottle seal
US20100012670A1 (en) * 2008-07-21 2010-01-21 Mark Massey Dispensing lid for container
US20170305615A1 (en) * 2014-10-07 2017-10-26 Stanpac Inc. Tamper Evident Lid and Method of Making Same
US9694948B1 (en) * 2016-06-03 2017-07-04 Inostrannoje Proizvodstvennoe Unitarnoje Predpriyatie “Alcopack” Closure device for bottle

Also Published As

Publication number Publication date
FR2116450B1 (enExample) 1975-06-13
ZA711980B (en) 1972-10-25
DE2142297A1 (de) 1972-06-08
CA965734A (en) 1975-04-08
DE2142297C2 (de) 1983-04-14
FR2116450A1 (enExample) 1972-07-13

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