US3465907A - Closure seal for containers having screw threaded necks - Google Patents

Closure seal for containers having screw threaded necks Download PDF

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Publication number
US3465907A
US3465907A US758870A US3465907DA US3465907A US 3465907 A US3465907 A US 3465907A US 758870 A US758870 A US 758870A US 3465907D A US3465907D A US 3465907DA US 3465907 A US3465907 A US 3465907A
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United States
Prior art keywords
liner
closure
sealing
cap
neck
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
US758870A
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English (en)
Inventor
Henry J Dorn
Halford E Brockett
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
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Continental Can Co Inc
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Publication date
Application filed by Continental Can Co Inc filed Critical Continental Can Co Inc
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Publication of US3465907A publication Critical patent/US3465907A/en
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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
    • B65D41/02—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
    • 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

Definitions

  • the closure cap loosely applied to the container neck is deformed by a sealing head so that a portion of the crown is pressed towards the exterior sides of the mouth portion of the threaded neck whereby portions of the sealing liner are turned inward to form a side seal.
  • This deforming operation is referred to in the art as reforming.
  • the skirt portion of the closure is deformed to effect inter-engagement thereof with the threaded portion of the neck by means of thread rollers positioned symmetrically about the container which inwardly deform the skirt between adjacent thread ribs on the container neck.
  • Deformable closure caps of the type described above have been adapted to form tamper-proof closures.
  • the deformable closure cap forms a removable top portion which is connected to a depending retaining ring portion by means of a series of fracturable bridge members with the retaining ring portion having its lower edge secured to the container by being crimped under an annular flange portion on the neck of the container.
  • sealing liners in the tamper-proof closures of the type described above are generally rubber-like resilient materials which are flowable under the pressures to which the closure is subjected to during reforming.
  • Plastisol compositions are preferred and are widely used as sealing liners for closures as they are easily applied materials characterized by resistance to acids, beverage, and food products and are relatively tasteless and odorless and are not affected by moisture.
  • a closure for a bottle or the like container having a neck provided with screw threads and an annular shoulder at a position spaced from the mouth of the neck, the closure being fabricated from a deformable material and generally comprised of a crown portion and an annular skirt depending therefrom, the interior face of the crown being coated with a lacquer layer having a sealing liner composed of resilient material secured thereto, the liner having an outer peripheral annular sealing area and an inner central non-sealing area, the lacquer having a coating applied thereto which contacts the liner in the annular sealing area and creates a low order of adhesion between the liner surface and the lacquer layer so that the liner is strongly adherent to the lacquered interior surface of the crown in the inner central non-sealing area and poorly adherent or substantially non-adherent to the lacquered interior of the crown in the outer peripheral annular annular
  • FIGURE 1 is a sectional view of one form of closure cap according to the invention.
  • FIGURE 2 is a plan view into the open face of a lacquered closure shell according to the invention.
  • FIGURE 3 is a like view with a formed liner in place.
  • FIGURE 4 illustrates the manner of carrying a method of sealing using a closure cap as shown in FIGURE 1.
  • FIGURE 5 illustrates the reforming of the cap and the interengagement of the skirt with the threads of the neck of the container.
  • FIGURE 1 illustrates one form of closure cap according to the invention, the closure 10 being made of permanently deformable material such as tinplate or aluminum and comprising a crown portion 11, skirt portion 12 and a retaining ring portion 13 formed integrally with the skirt portion 12 and extending downwardly from the lower end of the skirt.
  • the closure 10 being made of permanently deformable material such as tinplate or aluminum and comprising a crown portion 11, skirt portion 12 and a retaining ring portion 13 formed integrally with the skirt portion 12 and extending downwardly from the lower end of the skirt.
  • the retaining ring portion 13 of the closure 10 is secured to the lower end of the skirt portion by means of a series of fracturable bridge members 14. By securing the retaining ring portion 13 to the cap 10 in this manner, the ring may be easily severed from the cap portion when the cap is twisted relative to the retaining ring.
  • the interior upper face of the cap 10 is coated with an internal lacquer layer 15.
  • the lacquer can be of the usual type used for coating the interior of closures. If a plastisol liner is used, a suitable lacquer is a solvent solution containing a vinyl chloride-vinyl acetate copolymer with a small amount of maleic anhydride in the vinyl copolymer and also containing a phenolic resin modifier. Such a lacquer applied to metal and baked at 350 F. for 10 minutes gives good adhesion of a hot shaped vinyl chloride resin plastisol liner.
  • a resilient liner or cushion 16 which has a thicker annular portion or sealing ring 17 for engagement with the container lip and a thin central portion 18 is provided in the cap shell 11.
  • a thin coating material 19 which material creates a low order of adhesion between the liner 16 and the lacquered cap shell in the sealing ring area of the liner.
  • the sealing liner 16 can be made of any material which provides a resilient liner and which is flowable under the pressures to which the closure is subjected in the reforming operation.
  • Suitable materials from which the liner may be formed include rubber/resin blends, including blends based on neoprene, nitrile, natural, styrene-butadiene, and ethylene-propylene rubbers; vinyl resin compositions, including plastisols of vinyl chloride polymers and blends of vinyl resins, polyurethane rubbers and rubber gaskets prepared from solutions or latices and flowed and solidified in position in the closure shell. These materials may be modified by the addition of various additives to impart desirable properties such as fillers, plasticizers, tackifiers, curing agents and antioxidants.
  • Plastisols are preferred as materials from which the sealing liner can be formed.
  • Useful plastisols for the liner composition include fine granules of vinyl chloride polymers such as polyvinylchloride or copolymers of vinyl chloride with up to about 20 weight percent of a copolymerizable ethylenically unsaturated monomer such as vinyl acetate, vinylidene chloride, dibutyl maleate and mixtures of such monomers, the polymer granules being suspended in a conventional primary vinyl resin plasticizer such as an alkyl phthalate such as dioctyl phthalate or an epoxidized oil such as epoxidized linseed oil, a dicarboXylic acid ester, a triaryl phosphate or a combination of plasticizers.
  • a conventional primary vinyl resin plasticizer such as an alkyl phthalate such as dioctyl phthalate or an epoxidized oil such as epoxid
  • the sealing liner composition can be composed in parts by weight of:
  • the plastisol may be deposited in the cap shells by various known techniques, one being the so-called flowed in technique wherein the plastisol composition in an uncured, pastelike condition is squirted from one or more nozzles into the cap shells which are turned upside down on a chuck rotating at high speed. Due to centrifugal force the sealing liner material will assume the desired contour and shape. After being thus deposited or flowed in the liners are cured by a heating operation according to known procedures and using known equipment. The cured liners will permanently adhere to the lacquered interior of the shell except in the outer peripheral annular sealing area which has been coated with a Icoating which substantially destroys the adhesion of the liner in this area.
  • the coating material 19 may be of any material which creates a low order of adhesion between the liner and the lacquered shell.
  • the coating material 19 may be a material which is strongly adherent to the lacquered surface of the shell and substantially non-adherent to the liner or conversely the coating material 19 may be one which has greater adhesion to the liner than to the lacquered shell surface.
  • lithographic inks available to the printing art, which inks may be conveniently applied to the lacquered surfaces using conventional printing methods, e.g., silk screening, offset lithography, rotogravure and the like.
  • FIGURES 4-5 illustrate the method of closing and sealing a bottle when using the cap shown in FIGURE 1.
  • FIGURE 4 illustrates the position of the parts preparatory to the closing and sealing of the mouth of the neck 20, of a bottle being stood on a support, not shown, and the neck aligned with a closing and sealing head 21 which in a known manner, is arranged to be reciprocated into and out of engagement with the closure cap 10 which has been loosely applied to the neck 20.
  • the head 21 is provided with an arched opening so shaped that when the head is moved towards the cap, the portions 22 of the arch engage the outer peripheral portion of the cap 10, and during continued downward movement of the head, deforms the crown 11 to effect tailoring of the crown 11 about the mouth end of the neck causing the sides and top of the mouth end of the neck to be sealed into and against the sealing liner as shown in FIGURES 4 and 5.
  • the sealing ring portion of the liner is caused to flow or extrude by the application of top pressure to the outer peripheral portion of the cap to form a side seal with the outer sides of the mouth end of the neck 20.
  • the lower portion of the retaining ring is crimped under the annular flange 28 of the bottle in the usual manner using known means for this purpose.
  • EXAMPLE I Aluminum closures formed of a crown having an outside diameter of 1% inches and a depending skirt having a retaining ring attached thereto of the type illustrated in FIGURE 1 of the drawings were provided with a layer of vinyl lacquer over the entire inner surface. A continuous ring of a printing ink having a width of 0.150 inch was printed over the inner surface lacquer layer in the outer peripheral sealing area of the liner beginning at the edge of the skirt sidewall as shown in FIGURE 2 of the drawings.
  • the plastisol liner was substantially non-adherent t0 the interior of the closure in the peripheral sealing area of the cap to which the printing ink had been applied.
  • the plastisol lined closures were engaged on screw threaded 28 02. bottles as illustrated in FIGURES 45 of the drawings using conventional closing machines at a rate of 220 bottles per minute (b.p.m.). After application of the closure caps, the bottles were examined for mistucks. The number of mis-tucks per 220 bottles capped in this manner was 10.
  • Example I the procedure of Example I was repeated with the exception that the lacquer layer was not printed with a printing ink in the outer peripheral annular sealing area prior to the application of the plastisol liner, and there was total adhesion of the liner to the interior of the lacquered shell. The number of mis-tucks per 220 bottles using these closures was 45.
  • Example II The procedure of Example I was repeated with the exception that the printed lacquer, plastisol lined closures were applied to 16 oz. bottles at 460 b.p.m. The number of mis-tucks per 460 bottles was found to be 2. 7
  • Example II the procedure of Example II was repeated with the exception that the interior lacquer layer was not printed with a printing ink in the outer peripheral annular sealing area prior to the application of the plastisol liner and there was total adhesion of the liner to the lacquered shell.
  • the number of mis-tucks per 460 bottles was 42.
  • a container closure made from a permanently deformable metal material for application to containers having a screw-threaded neck and an annular shoulder at a position spaced from the mouth of the neck, said closure being comprised of:
  • top portion being comprised of a crown and an annular skirt depending therefrom,
  • the crown having an internal lacquer layer thereon and containing a resilient sealing liner
  • the liner comprising an outer peripheral annular sealing area and an inner central non-sealing area
  • the lacquer having a coating in the outer peripheral annular sealing area of the liner which renders the annular sealing area of the liner poorly adherent to the lacquered surface, so that the liner is strongly adherent to the lacquered interior surface of the crown in the inner central non-sealing area of the liner and poorly adherent to the lacquered interior surface of the crown in the outer peripheral annular sealing area of the liner.
  • closure of claim 1 having a retaining ring portion formed integrally with the top portion of the closure and projecting downwardly from the lower edge of the skirt, at least one of the upper edges of the retaining ring portion being secured to the bottom edge of the skirt by means of at least one fracturable bridge member, the lower edge of the retaining ring being adapted to be crimped about the annular shoulder of the container forming a tamper-proof closure.
  • sealing liner is formed from a plastisol composition.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Closures For Containers (AREA)
US758870A 1968-09-10 1968-09-10 Closure seal for containers having screw threaded necks Expired - Lifetime US3465907A (en)

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Application Number Priority Date Filing Date Title
US75887068A 1968-09-10 1968-09-10

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DE (1) DE1932041B2 (de)

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3589544A (en) * 1969-06-26 1971-06-29 Charles N Hannon Tamperproof cap closure
US3601273A (en) * 1969-01-31 1971-08-24 Aluminum Co Of America Pilferproof closure with vertical weakening lines
US3648874A (en) * 1970-07-15 1972-03-14 Continental Can Co Press-on, twist-off bottle cap
US3685679A (en) * 1971-02-22 1972-08-22 Vernon C Heffran Vented closure
US3746202A (en) * 1971-06-01 1973-07-17 Continental Can Co Die forming and perforating pilfer-proof band of closure caps
US3749272A (en) * 1972-05-08 1973-07-31 Continental Can Co Deformable closure for containers
US3771683A (en) * 1971-12-27 1973-11-13 Pittsburh Aluminum Container closure
US3837519A (en) * 1973-01-16 1974-09-24 W Perry Container closure with opening indicators
US3859942A (en) * 1971-06-01 1975-01-14 Continental Can Co Apparatus for and method of die forming and perforating pilfer-proof band of closure caps
JPS5041681A (de) * 1973-04-12 1975-04-16
US3913771A (en) * 1973-06-01 1975-10-21 Anchor Hocking Corp Closure cap with tamper indicator
US4333585A (en) * 1978-07-10 1982-06-08 Luigi Del Bon Deep-drawn preformed closure for the hermetic sealing of a can or similar container
US4712705A (en) * 1987-01-30 1987-12-15 Stoffel Seals Corporation Tamper indicating cap seal for container valves
US4827944A (en) * 1987-07-22 1989-05-09 Becton, Dickinson And Company Body fluid sample collection tube composite
EP0349304A2 (de) * 1988-06-29 1990-01-03 W.R. Grace & Co.-Conn. Behälterverschluss
US5445284A (en) * 1990-09-05 1995-08-29 Mcg Closures Limited Container closures

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8627663U1 (de) * 1986-10-16 1986-11-27 Alcoa Deutschland Gmbh Verpackungswerke, 6520 Worms Abblasender Flaschenverschluß in Kappenform

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT240251B (de) * 1962-04-27 1965-05-25 Metal Closures Ltd Verschluß für Behälter und Verfahren zu seiner Herstellung
US3411650A (en) * 1966-09-19 1968-11-19 Owens Illinois Inc Closure and sealing medium for glass jars and other containers
US3411649A (en) * 1966-09-19 1968-11-19 Owens Illinois Inc Closure for reducing heat transfer to product during processing

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT240251B (de) * 1962-04-27 1965-05-25 Metal Closures Ltd Verschluß für Behälter und Verfahren zu seiner Herstellung
US3411650A (en) * 1966-09-19 1968-11-19 Owens Illinois Inc Closure and sealing medium for glass jars and other containers
US3411649A (en) * 1966-09-19 1968-11-19 Owens Illinois Inc Closure for reducing heat transfer to product during processing

Cited By (18)

* 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
US3589544A (en) * 1969-06-26 1971-06-29 Charles N Hannon Tamperproof cap closure
US3648874A (en) * 1970-07-15 1972-03-14 Continental Can Co Press-on, twist-off bottle cap
US3685679A (en) * 1971-02-22 1972-08-22 Vernon C Heffran Vented closure
US3859942A (en) * 1971-06-01 1975-01-14 Continental Can Co Apparatus for and method of die forming and perforating pilfer-proof band of closure caps
US3746202A (en) * 1971-06-01 1973-07-17 Continental Can Co Die forming and perforating pilfer-proof band of closure caps
US3771683A (en) * 1971-12-27 1973-11-13 Pittsburh Aluminum Container closure
US3749272A (en) * 1972-05-08 1973-07-31 Continental Can Co Deformable closure for containers
US3837519A (en) * 1973-01-16 1974-09-24 W Perry Container closure with opening indicators
JPS56142160A (en) * 1973-04-12 1981-11-06 Grace W R & Co Method of sealing bottle and bottle sealed by such method
JPS5041681A (de) * 1973-04-12 1975-04-16
US3913771A (en) * 1973-06-01 1975-10-21 Anchor Hocking Corp Closure cap with tamper indicator
US4333585A (en) * 1978-07-10 1982-06-08 Luigi Del Bon Deep-drawn preformed closure for the hermetic sealing of a can or similar container
US4712705A (en) * 1987-01-30 1987-12-15 Stoffel Seals Corporation Tamper indicating cap seal for container valves
US4827944A (en) * 1987-07-22 1989-05-09 Becton, Dickinson And Company Body fluid sample collection tube composite
EP0349304A2 (de) * 1988-06-29 1990-01-03 W.R. Grace & Co.-Conn. Behälterverschluss
EP0349304A3 (en) * 1988-06-29 1990-11-07 W.R. Grace & Co.-Conn. Container closures and materials for use in these
US5445284A (en) * 1990-09-05 1995-08-29 Mcg Closures Limited Container closures

Also Published As

Publication number Publication date
DE1932041B2 (de) 1975-06-05
DE1932041A1 (de) 1970-03-19

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