US3796338A - Container closure having frangible skirt - Google Patents

Container closure having frangible skirt Download PDF

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Publication number
US3796338A
US3796338A US00251758A US3796338DA US3796338A US 3796338 A US3796338 A US 3796338A US 00251758 A US00251758 A US 00251758A US 3796338D A US3796338D A US 3796338DA US 3796338 A US3796338 A US 3796338A
Authority
US
United States
Prior art keywords
security band
bridges
skirt
closure
bridge
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
US00251758A
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English (en)
Inventor
R Wilton
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.)
Arconic Closure Systems International UK Ltd
Original Assignee
Metal Closures Ltd
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 Metal Closures Ltd filed Critical Metal Closures Ltd
Application granted granted Critical
Publication of US3796338A publication Critical patent/US3796338A/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
    • B65D2401/00—Tamper-indicating means
    • B65D2401/15—Tearable part of the closure
    • B65D2401/30—Tamper-ring remaining connected to closure after initial removal
    • 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
    • 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
    • B65D2401/40—Bridges having different cross-sections

Definitions

  • ABSTRACT A pilferproof closure of the type having a security band attached to the skirt of the closure by a series of spaced bridges in a peripheral slit line characterised in that the security band is split vertically at at least two positions, the portion of the security band between two adjacent vertical splits being joined to the skirt by at least one relatively strong bridge arranged at or near the middle of such portion, a relatively weak bridge in close proximity to the vertical split at each end of said portion and spaced from the strong bridge.
  • the present invention relates to closures of the pilferproof type which have a thin aluminium shell and to the manufacture of such closures.
  • Pilferproof closures comprising a top and a skirt, to which a security band is attached by means of a series of spaced bridges arranged in a peripheral slit line, have long been known.
  • the lower margin of the security band is, during the application of the closure to a bottle, engaged under a rib on the bottle neck by a rolling operation, usually performed simultaneously with the formation of thread in the skirt by a rolling operation.
  • thermoplastic disc may be employed.
  • a thickened portion may be achieved by flowing in a viscous gasket composition into the shell and rotating the shell.
  • an inserted thermoplastic disc or deposit of gasket composition may be reformed by a punch.
  • pilferproof closures were employed as a visible guarantee that the contents of the bottle had not been tampered with; for example to guarantee that thecontents of a bottle of spirits had not been partially abstracted and replaced by water.
  • a pilferproof closure is used on carbonated beverages it is employed principally as a lock to prevent accidental loosening of the closure and consequent loss of carbonation, particularly during the processing, such as pasteurisation, which takes place before despatch from the bottling plant.
  • the gasket material is in a softened condition as a result of being heated during a pasteurisation treatment, the opening torque required to open a newly-filled bottle is relatively low.
  • the security band shall act as a lock to prevent accidental loss of carbonation pressure than it should act as a guarantee that the contents have not been adulterated after despatch from the bottling plant.
  • the present invention is concerned with a pilferproof closure in which the security band is split vertically at two or more positions and is arranged so that, on unscrewing, the portion of the security band, between two splits, hinges outwardly, whilst remaining secured to the threaded portion of the skirt by one or more unsevered bridges.
  • This arrangement relies on the camming action of the rib on the bottle, under which the lower margin of the security band is engaged.
  • the split or splits in the security band shall not extend through the metal of the security band and shall, in fact, be a score line. Owing to the difficulty of forming score lines to a constant depth, the opening torque necessary to burst the security band along one of the score lines tends to be rather variable.-l-lowever, unless the splits have been formed as score lines (and thus are not true splits) difficulty has been experienced in applying a pilferproof closure of this type to a bottle without causing some gaping of the security band at one or more of the splits.
  • a pilferproof closure is characterised by a security band, which is split vertically at at least two positions, the portion of the security band between two adjacent vertical splits being joined to the skirt by at least one relatively strong bridge or a pair of relatively strong bridges spaced from each other, arranged at or near the middle of such portion, a relatively weak bridge in close proximity to the vertical split at each end of said portion and spaced from the strong bridge or bridges.
  • These relatively weak bridges support the ends of the security band portions and prevent drag down of the ends of such portions through the action of the application rolls, when the security band is engaged under the rib on the bottle. This permits a fully split security band to be turned under the bottle rib without substantial risk of unsightly gaping at the splits.
  • each split in the security band is preferably perpendicular to the peripheral split line, they may be somewhat inclined, say at or more. Whilst the splits are cut right through the metal of the security band, each split preferably includes a small bridge near the lower end. In order to ensure that this small bridge is of substantially constant size (and strength) it is pref erably located at a small distance inwardly from the bottom end of the split. The purpose of this small bridge is to prevent deformation of the security band before application to a bottle under the light forces to which it may be subjected in, for example, the hopper of a closure seal-applying machine.
  • a pair of strong bridges When there are two splits in the security band of a closure of the present invention, it is preferred to employ a pair of strong bridges with an additional relatively weak bridge between them. When there are more splits (and in consequence the strong bridges of each pair are closer to one another) such intermediate weak bridges are preferably omitted.
  • the pair of spaced strong bridges may be replaced by a single strong bridge.
  • all slits, knurling, ribs and grooves in the shell are formed by rolling a deep drawn shell between an internal mandrel and an external drum of larger diameter, on which are located all the necessary formations for the operations to be performed on the shell.
  • Any operation, such as knurling or formation of ribs or grooves in proximity to the peripheral slit line, must be performed before the peripheral slit line is cut: after the slit line is out there is risk of damage to the bridges and the cutting of the slit line is therefore preferably the last operation in this sequence.
  • such bead is interrupted at positions corresponding to the vertical splits. This permits these splits to be formed by straight-edged cutters and thus simplifies the tooling used for the production of the closures.
  • FIG. l is a side view of the closure, partly in section,
  • FIG. 2 is a section on the peripheral slit line
  • FIG. 3 is a side view partly in section illustrating the application of a closure to a bottle
  • FIG. 4 is a section on the peripheral slit line of a modified form of closure.
  • the closure comprises a top 1, a skirt 2 and a security band 3.
  • a gasket 4 is formed of flowed-in material, covering the inside of the top and forming a thickened annulus 5 at the angle between the skirt 2 and top I.
  • the skirt 2 has a plain portion 6, in which thread is formed when the closure is applied to a bottle.
  • a plain portion 6 Above the portion 6 is an inwardly directed groove 7, which forms a support at the bottom edge of a band 8 of outwardly pressed knurling.
  • the knurling 8 is formed by knurling projections on the internal rolling mandrel, which press metal outwardly into corresponding recesses in the drum in the roll-forming operation described above.
  • a small plain portion is provided above the knurling 8 to permit redrawing and diameter reduction during application to a bottle, as previously mentioned and as illustrated in FIG. 3.
  • a bead 10 which is formed with knurling 11 having the same pitch as the knurling 8.
  • a bead 12 is provided at the top edge of the security band.
  • This bead is in fact in the form of a plurality of elongated knurled teeth 14, separated by flats 15.
  • the number of teeth 14 bears a whole number relationship to the number of teeth in the bands 8 and 11.
  • the number of flats 15 in turn bears a whole number relationship to the number of vertical slits 16 in the security band: in this instance there are three slits 16, twelve flats 15 and 48 teeth in the bands of knurling 8 and 11.
  • Each slit 16 is in register with a flat l5 and is provided with a small bridge 17 near its bottom end.
  • the bridge 17 is smaller than any of the bridges in the peripheral slit line and is frequently fractured during application of the closure to a bottle.
  • the flats 15 may, however, be omitted.
  • the security band 3 is formed as virtually three separate sections 18, separated from each other by the slits 16.
  • Each section 18 is joined to the skirt 2 by a pair of strong bridges 19, whilst a pair of relatively weak bridges 20 are positioned close to the upper end of the slits 16.
  • adjacent bridges 20 are shown as separated from each other by a short horizontal slit 21, it is possible for the weak bridges 20 to be separated from each other by no more than the vertical slit 16.
  • the illustrated construction is preferred since it is easier in that way to control the width of the individual weak bridges.
  • each security band portion is bounded by a pair of vertical slits 16 and is connected to the threaded upper part by a single strong bridge 19' and by a pair of weak bridges 20, one at each end of the portion.
  • slits in the security band may be provided without departing from the present invention, but the number of slits 16, the number of flats l5 and the number of teeth in the knurling 3 and 11 preferably always bear a whole number relationship to each other. For example, there might be five slits l6, l0 flats 15 and 50 teeth in each of the bands of knurling 8 and Ill.
  • a pilferproof closure of the type having a security band attached to the skirt of the closure by a series of spaced bridges in a peripheral slit line, the security band being split vertically at at least two positions, the portion of the security band between two splits being arranged to hinge outwardly during removal of the closure while remaining secured to the skirt by one or more unsevered bridges, characterized in that the portion of the security band between two adjacent vertical splits is joined to the skirt by at least one relatively strong bridge arranged at or near the middle of such portion, a relatively weak bridge in close proximity to the vertical split at each end of said portion and spaced from the strong bridge.
  • a pilferproof closure according to claim 1 further characterised in that there are a pair of strong bridges located substantially symmetrically in relation to the middle of each portion of the security band.
  • a pilferproof closure according to claim 2 further characterised in that a weak bridge is arranged between the pair of strong bridges.
  • a pilferproof closure according to claim 1 further characterized in that the splits are cut completely through the security band except for a bridge near, but spaced from, the lower end of the split, and smaller than the bridges joining the security band to the skirt of the closure.
  • a pilferproof closure of the type having a security band attached to the skirt of the closure by a series of spaced bridges in a peripheral slit line, the security band being split vertically in at least two positions, the portion of the security band between two splits being arranged to hinge outwardly during removal of the closure while remaining secured to the skirt by one or more unsevered bridges, charcterized in that the portion of the security hand between two adjacent vertical splits is joined to the skirt by at least one relatively strong bridge arranged at or near the middle of such portion, a relatively weak bridge in close proximity to the vertical split at each edge of said portion and spaced from the strong bridge, and a bead formed near the upper margin of the security band, the said bead being flattened in register with each vertical slit, whereby the vertical slits may be easily formed after formation of the head.
  • a pilferproof closure according to claim 5 further characterised by a first band of knurling at a position close to the upper margin of the skirt, a second band of knurling at a position immediately above said peripheral slit line and a series of flats in said bead in said security band, the number of teeth in said bands of knurling and the number of flats formed in said bead bearing a whole number relationship with each other.
  • a pilferproof closure according to claim 5 further characterized in that there are a pair of strong bridges located substantially symetrically in relation to the middle of each portion of the security band.
  • a pilferproof closure according to claim 7 further characterized in that a weak bridge is arranged between the pair of strong bridges.
  • a pilferproof closure according to claim 5 further characterized in that the splits are out completely through the security band except for a bridge near, but spaced from, the lower end of the split, and smaller than the bridges joining the security band to the skirt of the closure.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Closures For Containers (AREA)
US00251758A 1971-05-11 1972-05-09 Container closure having frangible skirt Expired - Lifetime US3796338A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1432171A GB1394363A (en) 1971-05-11 1971-05-11 Container closure

Publications (1)

Publication Number Publication Date
US3796338A true US3796338A (en) 1974-03-12

Family

ID=10039090

Family Applications (1)

Application Number Title Priority Date Filing Date
US00251758A Expired - Lifetime US3796338A (en) 1971-05-11 1972-05-09 Container closure having frangible skirt

Country Status (16)

Country Link
US (1) US3796338A (es)
AT (1) AT319792B (es)
BE (1) BE783313A (es)
BR (1) BR7202945D0 (es)
CA (1) CA962628A (es)
DE (1) DE2222655A1 (es)
DK (1) DK135529B (es)
EG (1) EG10766A (es)
ES (2) ES175482Y (es)
FR (1) FR2137739B1 (es)
GB (1) GB1394363A (es)
IL (1) IL39378A (es)
IT (1) IT955383B (es)
NL (1) NL171687C (es)
SE (1) SE376746B (es)
ZA (1) ZA723135B (es)

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2482565A1 (fr) * 1980-05-19 1981-11-20 Owens Illinois Inc Element de fermeture inviolable en matiere plastique moulee pour des recipients
DE4121619A1 (de) * 1991-06-29 1993-01-14 Alcoa Gmbh Verpackwerke Kunststoff-verschluss fuer behaelter
US20060169665A1 (en) * 2003-02-28 2006-08-03 Daiwa Can Company Metal pilfer-proof cap
US20060266727A1 (en) * 2003-05-13 2006-11-30 Alcoa Deutschland Gmbh Bottle seal
USD633386S1 (en) 2010-05-27 2011-03-01 Silgan White Cap LLC Closure
USD634200S1 (en) 2010-05-27 2011-03-15 Silgan White Cap LLC Closure
USD634199S1 (en) 2010-05-27 2011-03-15 Silgan White Cap LLC Closure
US8231020B2 (en) 2010-05-27 2012-07-31 Silgan White Cap LLC Impact resistant closure
CN105015913A (zh) * 2015-08-04 2015-11-04 泉州华硕实业有限公司 一种具有防盗条的防伪瓶盖
CN105015912A (zh) * 2015-08-04 2015-11-04 泉州华硕实业有限公司 一种防伪瓶盖
US11059633B2 (en) 2019-10-31 2021-07-13 Cheer Pack North America Flip-top closure for container
US20220177199A1 (en) * 2020-12-04 2022-06-09 Niagara Bottling, Llc Multiple asymmetric anchor container closure
WO2023136836A1 (en) * 2022-01-14 2023-07-20 Amcor Flexibles North America, Inc. A tamper evident closure for a threaded container
US11975891B2 (en) 2020-08-07 2024-05-07 Niagara Bottling, Llc Single anchor closure

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT375893B (de) * 1982-09-14 1984-09-25 Schuett Elisabeth Schraubkappe aus kunststoff und vorrichtung zum verschliessen eines behaelters mit derselben
US5937726A (en) * 1991-06-29 1999-08-17 Alcoa Deutschland Gmbh Method for cutting vertical incision in container cap
US5660289A (en) * 1991-06-29 1997-08-26 Alcoa Deutschland Gmbh Plastic cap for containers

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3601273A (en) * 1969-01-31 1971-08-24 Aluminum Co Of America Pilferproof closure with vertical weakening lines

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3601273A (en) * 1969-01-31 1971-08-24 Aluminum Co Of America Pilferproof closure with vertical weakening lines

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2482565A1 (fr) * 1980-05-19 1981-11-20 Owens Illinois Inc Element de fermeture inviolable en matiere plastique moulee pour des recipients
US4322009A (en) * 1980-05-19 1982-03-30 Owens-Illinois, Inc. Tamper proof molded plastic closure
DE4121619A1 (de) * 1991-06-29 1993-01-14 Alcoa Gmbh Verpackwerke Kunststoff-verschluss fuer behaelter
US20060169665A1 (en) * 2003-02-28 2006-08-03 Daiwa Can Company Metal pilfer-proof cap
US7581651B2 (en) * 2003-02-28 2009-09-01 Daiwa Can Company Metal pilfer-proof cap
US20060266727A1 (en) * 2003-05-13 2006-11-30 Alcoa Deutschland Gmbh Bottle seal
USD634199S1 (en) 2010-05-27 2011-03-15 Silgan White Cap LLC Closure
USD634200S1 (en) 2010-05-27 2011-03-15 Silgan White Cap LLC Closure
USD633386S1 (en) 2010-05-27 2011-03-01 Silgan White Cap LLC Closure
US8231020B2 (en) 2010-05-27 2012-07-31 Silgan White Cap LLC Impact resistant closure
US8672158B2 (en) 2010-05-27 2014-03-18 Silgan White Cap LLC Impact resistant closure
CN105015913A (zh) * 2015-08-04 2015-11-04 泉州华硕实业有限公司 一种具有防盗条的防伪瓶盖
CN105015912A (zh) * 2015-08-04 2015-11-04 泉州华硕实业有限公司 一种防伪瓶盖
US11059633B2 (en) 2019-10-31 2021-07-13 Cheer Pack North America Flip-top closure for container
US11975891B2 (en) 2020-08-07 2024-05-07 Niagara Bottling, Llc Single anchor closure
US20220177199A1 (en) * 2020-12-04 2022-06-09 Niagara Bottling, Llc Multiple asymmetric anchor container closure
WO2023136836A1 (en) * 2022-01-14 2023-07-20 Amcor Flexibles North America, Inc. A tamper evident closure for a threaded container

Also Published As

Publication number Publication date
ES180270Y (es) 1974-01-01
ES180270U (es) 1973-02-01
CA962628A (en) 1975-02-11
DE2222655A1 (de) 1972-11-23
FR2137739B1 (es) 1979-08-24
DK135529C (es) 1977-10-24
BE783313A (fr) 1972-11-10
GB1394363A (en) 1975-05-14
ES175482U (es) 1972-06-16
NL171687C (nl) 1983-05-02
IT955383B (it) 1973-09-29
ZA723135B (en) 1973-12-19
BR7202945D0 (pt) 1973-07-10
IL39378A0 (en) 1972-07-26
SE376746B (es) 1975-06-09
ES175482Y (es) 1973-01-16
EG10766A (en) 1976-08-31
NL7206295A (es) 1972-11-14
AT319792B (de) 1975-01-10
FR2137739A1 (es) 1972-12-29
DK135529B (da) 1977-05-16
NL171687B (nl) 1982-12-01
AU4212672A (en) 1973-11-15
IL39378A (en) 1974-10-22

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