US2823422A - Manufacture of closure seals having formed cushion pads therein - Google Patents

Manufacture of closure seals having formed cushion pads therein Download PDF

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Publication number
US2823422A
US2823422A US19466250A US2823422A US 2823422 A US2823422 A US 2823422A US 19466250 A US19466250 A US 19466250A US 2823422 A US2823422 A US 2823422A
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US
United States
Prior art keywords
punch
crown
shell
cushion pad
periphery
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
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English (en)
Inventor
Julius L Schneider
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
Priority to US19466250 priority Critical patent/US2823422A/en
Application granted granted Critical
Publication of US2823422A publication Critical patent/US2823422A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
    • B29C43/32—Component parts, details or accessories; Auxiliary operations
    • B29C43/36—Moulds for making articles of definite length, i.e. discrete articles
    • B29C43/38—Moulds for making articles of definite length, i.e. discrete articles with means to avoid flashes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C33/00—Moulds or cores; Details thereof or accessories therefor
    • B29C33/0038—Moulds or cores; Details thereof or accessories therefor with sealing means or the like
    • B29C33/0044—Moulds or cores; Details thereof or accessories therefor with sealing means or the like for sealing off parts of inserts projecting into the mould cavity
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
    • B29C43/02—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles
    • B29C43/18—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles incorporating preformed parts or layers, e.g. compression moulding around inserts or for coating articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/68—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts by incorporating or moulding on preformed parts, e.g. inserts or layers, e.g. foam blocks
    • B29C70/78—Moulding material on one side only of the preformed part
    • B29C70/80—Moulding sealing material into closure members
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/56—Stoppers or lids for bottles, jars, or the like, e.g. closures
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S425/00—Plastic article or earthenware shaping or treating: apparatus
    • Y10S425/809—Seal, bottle caps only
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
    • Y10T156/10—Methods of surface bonding and/or assembly therefor
    • Y10T156/1052—Methods of surface bonding and/or assembly therefor with cutting, punching, tearing or severing
    • Y10T156/1062—Prior to assembly
    • Y10T156/107—Punching and bonding pressure application by punch
    • Y10T156/1072—Closure cap liner applying type
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31678—Of metal
    • Y10T428/31692—Next to addition polymer from unsaturated monomers
    • Y10T428/31699—Ester, halide or nitrile of addition polymer

Definitions

  • This invention relates to the manufacture of closure seals having formed cushion pads therein.
  • a feature of the present invention is to prevent the formation of such flash, by confining the plastic material during its flow, so that a cushion pad of the intended form is produced, and the extrusion of flash is eliminated.
  • Another feature of the invention is the use of a platen and punch set for shaping such cushion pads, in which the platen supports the crown shell and employs the same as a female mold for the shaping of the cushion pad, while the punch is effective to displace the plastic material, to confine it, and to cooperate with the shell in securing a cushion pad of the intended shape.
  • the supporting surface of the platen which acts as an anvil, has a lesser curvature, for example being flat, than the usual internally radiused or dome-like surface of the bottom of the crown
  • Another feature of the invention is a method of shaping a cushion pad in a crown shell, by engaging the periphery of a punch surface with an inner surface of the crown shell and thereafter exerting pressure upon the pad material to distribute it into the desired shape and therewith confining the material for preventing theformation of flash and for assuring the production of a cushion pad surface competent of sealing against the container lip, and also assuring adhesion of the pad to the crown shell adjacent the outer edge of the pad.
  • a further feature of the invention is the manufacture of a crown seal comprising a crown shell and a cushion pad, this cushion pad having a thin central portion and a thicker annular portion for engaging the lip of the container to be sealed, the annular portion being thicker at its outer periphery than at its inner periphery.
  • a further feature of the invention is the manufacture of a crown seal comprising a crown shell and a cushion pad therein, the cushion pad having a thin central portion and a thicker annular portion, the annular portion having a bevel at its outer periphery leading from the exposed lipengaging surface of the annular portion to the top corner radius of the crown shell.
  • Fig. 1 is a view showing a metal crown shell, partly in radial section and partly in elevation, to show a standard conformation thereof.
  • Fig. 2 shows such a crown shell present on a platen, and having a charge of cushion pad material therein.
  • Fig. 3 shows the structures as in Fig. 2, with a punch exerting pressure upon the material being shaped to form the cushion pad.
  • Fig. 4 shows the structures of Fig. 3, with the punch having been brought down to its final relative position, and having accomplished the shaping of the plastic material into the cushion pad.
  • Fig. 5 shows the shaped crown seal comprised of crown shell and formed cushion pad, in diametrical section.
  • the crown shell employed in crown seals of current practice is made of sheet metal by blanking and forming operations so that it has a concavely domed bottom portion 10 with a smoothly curved periphery leading to a corrugated skirt portion 11.
  • This smoothly curved peripheral portion 12 is known as the top corner radius.
  • the crown shells of Fig. l have the corrugated skirt portion 11 extending angularly outward from the junction with the top corner radius 12.
  • the crown shells as formed in the punch press have a domed bottom with a radius in the range of six inches to eight inches: this shape of bottom is referred to as top radius.
  • such a crown shell is placed on a platen 15, Fig. 2, which in the preferred form as illustrated, has a flat top surface for receiving the domed bottom 10 of the crown shell. It is preferred to have this platen heated to a temperature of flow of the plastic material as by a gas flame 16.
  • a standard quantity of the plastic material is measured and deposited as the mass 17 in the crown shell S shown in Fig. 2.
  • This material is preferably of thermoplastic nature, so that it can be made more fluid by heating: and exhibits elasticity in its final cooled condition.
  • a punch 20 has been brought down into contact with the mass 17, and has begun to deform the same by causing parts of the mass to flow relatively radially outward from the position shown in Fig. 2.
  • the punch 20 has a projecting central part 21 having a fiat end surface.
  • This punch has a conical shoulder surface 22 leading to the rebated part 23 of the end surface of the punch 20 which is to produce the exposed surface of the thicker annular portion of the cushion pad: in the illustrated prefered form, this surface 23 is also of conical shape.
  • the rib 24 has a fiat lower surface and sloping inner and outer surfaces 26, 27, each of.
  • the outer surface 27 leads to the maximum external diameter of the punch 20, this maximum external diameter at the upper end of the surface 27 being slightly les's'than the internal diameter of the crown shell at the region where the top corner radius 12 joins the skirt 13, wherewith the rib 24 can make contact with the inner surface of the crown shell at this top corner radius.
  • the platen 15 and the punch 20 are preferably heated to facilitate the thermoplastic flow of the material 17.
  • the punch 20 is brought down forcibly and the material begins to flow radially outwardly from the axis of the crown shell and towards the top corner radius 12 and skirt 11 of the crown shell.
  • This flow of the material 17 permits the punch 20 to move further into the crown shell so that the outer edge of the projecting rib 24 on the punch 20 seats (Fig. 3) in the top corner radius 12 near the juncture with the crown skirt 11, thus forming a seal between the periphery of punch 20 and the crown shell.
  • the periphery of the punch 20 applies pressure to the periphery of the crown shell, thereby preventing flashing past the positive seal between the periphery of the punch and the crown shell,
  • the pressure contact as shown in Fig. 4 may be maintained for the period of time desired and requisite for the shaping operation; and if the material of the mass 17 is of curable or vulcanizable nature, the punch and platen may then be maintained at a temperature for curing or vulcanizing the material, the contact being maintained until the mass is form-maintaining, or even until the curing or vulcanizing has been completely efiected.
  • the cushion pad has the thin central portion
  • the central portion 30 (formed by part 21 of the punch) may be about 0.735 inch
  • the annular portion 31 may be formed by a conical punch surface having an angle of 12 relative to the flat bottom 21 of the punch: and the side faces of the rib 24 may each have an angle of 16 relative to the axis of the punch, the flat on the rib having a width of about 0.008 inch, with an external diameter of about 1.026 inch and forming a plane spaced about 0.030 inch from the plane of the bottom 21; and the punch body having a diameter of 1.0525 inch.
  • the annular portion is not of uniform thickness, but has a greater thickness at its outer periphery 27 than at the inner periphery 28.
  • An incidental result of employing the rib 24 on the punch is that the annular portion 31 has a beveled outer edge 32 leading from the point of maximum thickness, in the illustrative form, to the top corner radius of the metal shell, thus providing a shape which permits some displacement of the annular portion 31 under the pressure and conditions of sealing and crimping, and assists in assuring adequate and proper contact with the container lip which permits the completed seal to resist leakage of gas or product through the seal.
  • the material employed for the plastic mass 17 may be of any suitable thermoplastic elastomer type, competent to resist the contents of the container to be sealed, such as natural or synthetic rubber compound, synthetic resin materials, and the like.
  • paste resins can be employed, in which the basic ingredients are an elastomer and a plasticizer therefor, the plasticizer being so selected that the clastomer is not actively soluble, i. e. essentially insoluble, therein at room temperature, but is soluble at some elevated fluxing temperature.
  • these two ingredients are ground together to form a paste which is fiowable at, say, to F, and the paste may also include other components such as inert fillers to limit cutting, modifying resin to assist control of the physical properties, stabilizers for the resin and other components, waxes to prevent blocking and to reduce moisture vapor and gas permeability, etc.
  • these other materials are not essential in the composition, but may be employed to contribute to the desired properties for the particular employment.
  • the elastomer component may be a vinyl resin of the class inclusive of polyvinyl chloride, copolymers of vinyl chloride and vinyl acetate such as the 97:3 percent copolymer, vinylidene chloride polymers, and copolymers of vinyl chloride and vinylidene chloride.
  • the chloride content should be high, when the seal is to resist aqueous liquids; such as 90 percent vinyl chloride in a copolymer.
  • plasticizers useful are those which have a very slow wetting or dissolving action upon the selected vinyl resin at room temperature and at temperatures up to around 115 F;
  • ester type plasticizers of vinyl resins have this general characteristic, and require higher temperatures for producing penetration, diffusion, and
  • A'preferred plasticizer is dioctyl phthalate: others are dibutyl phthalate, dioctyl sebacate, and tricresyl phosphate.
  • the plasticizer should be liquid at the temperature of use. 7
  • the ratio of the elastomer and plasticizer, by weight, may be from 6:4 to 4:6, with reference for a ratio of about 1:1.
  • Standard quantities of such paste resins may bedeposited in successive crown shells, and these in turn brought onto a hot platen and engaged by the hot punch. This engagement may occur while the deposited mass is essentially in its original condition, or the loaded shells may previously be moved through an oven, for example, so that a preliminary or partial curing is accomplished before the shaping is effected.
  • the pressure required for shaping the mass depends upon the composition employed and the degree of curing which has been effected prior to the engagement, and upon the temperature of the mass during the shaping operation.
  • paste resins in original condition require less than 30 to 50 pounds per square inch pressure for the shaping operation itself, wherewith a total pressure of 100 pounds is effective with the standard size of crown seal for producing the shaping of the mass and also the aforesaid resilient flattening of the domed bottom.
  • a total pressure of 100 pounds is effective with the standard size of crown seal for producing the shaping of the mass and also the aforesaid resilient flattening of the domed bottom.
  • shaping has been accomplished in standard crown shells with pressures of 150 pounds or less.
  • the charge may be introduced into the crown shell in the form of a disk or partly shaped blank, the completion of the shaping and the adhesion being accomplished by the use of the hot platen and the hot punch 20.
  • a suitable rubbery composition has rubber as an elastomer base which can be modified as desired by fillers, lubricant, and vulcanization agents.
  • An illustrative formulation is:
  • Crepe rubber Natural latex rubber
  • Semi-solid isobutylene polymer 12 Hydrated precipitated calcium silicate 63 Clay 65
  • Zinc oxide 5 Stearic acid 2 Heptylated diphenylamine l Dipentamethylene thiuram tetrasulfide 1 Tetramethyl thiuram monosulfide 1 /2
  • a vinyl lacquer prepared as described in the Maier et a1.
  • Patent No. 2,380,456 with 80 percent of vinyl chloridevinyl acetate copolymer resin and percent of oleoresinous modifier produces a satisfactory adhesion.
  • trimer lacquer having a corresponding solids formulation of 80 percent of vinyl chloride-vinyl acetate copolymerized in the presence of maleic anhydride as a modifier, for example in the respective ratios of 85: 13:2, together with 20 percent of a phenolic resin derived from orthocresol.
  • Either of these lacquers can be prepared in an organic solvent, such as 70% xylol and 30% isophorone, with 20% solids, for roller coating.
  • more volatile solvents such as toluol, methyl ethyl ketone, and methyl isobutyl ketone, can be used. After applying and drying, the coating is baked.
  • Such an internal lacquer coating is illustrated by the inner lining 40 in Fig. 5.
  • the customary external advertising is also illustrated as an outer lacquer coating 41.
  • the punch has at its periphery an axially extending rib for said sealing engagement with the top radius portion of the closure shell, and said punch end surface also has radiallyinward from said rib a rebated annular surface portion effective for providing in the cushion pad a thick part for engaging the container lip, said rib being effective in determination of the flow of the plastic material adjacent said top corner radius portion.
  • the plastic material for the cushion pad is a thermoplastic, and which includes the heating of the punch and supporting surfaces for assuring the flow of the confined plastic material into conformity with the closure seal and the punch surface.
  • the material for the cushion pad is a paste resin comprising of a thermoplastic resin and a plasticizer with the thermoplastic resin not actively soluble in the plasticizer at room temperature and soluble therein at an elevated fluxing temperature to form an elastic mass, and in which there is heating of the punch and supporting surfaces to a temperature for effecting solution of the thermoplastic resin in the plasticizer.
  • the material for the cushion pad is a vulcanizable elastomer composition capable of thermoplastic flow, and in which there is heating of the said punch and supporting surfaces to a temperature effective for softening the said composition upon contact therewith and initiating vulcanizing thereof.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Composite Materials (AREA)
  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
US19466250 1950-11-08 1950-11-08 Manufacture of closure seals having formed cushion pads therein Expired - Lifetime US2823422A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US19466250 US2823422A (en) 1950-11-08 1950-11-08 Manufacture of closure seals having formed cushion pads therein

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US19466250 US2823422A (en) 1950-11-08 1950-11-08 Manufacture of closure seals having formed cushion pads therein
GB1432154A GB751163A (en) 1954-05-17 1954-05-17 Manufacture of closure caps having formed cushion pads therein

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US2823422A true US2823422A (en) 1958-02-18

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US (1) US2823422A (cs)
BE (1) BE529212A (cs)
FR (1) FR1105041A (cs)
GB (1) GB751163A (cs)
NL (1) NL92618C (cs)

Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2910397A (en) * 1956-12-13 1959-10-27 Owens Illinois Glass Co Method of producing closure assembly
US2963738A (en) * 1958-03-28 1960-12-13 Bender Werke G M B H Fa Stamping punch for the manufacture of sealing inserts of thermoplastic artificial material in closing caps for containers, as bottles
US2981976A (en) * 1956-09-27 1961-05-02 Continental Can Co Molding apparatus
US3047910A (en) * 1959-11-24 1962-08-07 Plastomer Dev Corp Method of making thermoplastic tubular container
US3199705A (en) * 1963-11-04 1965-08-10 Continental Can Co Three-piece easy opening crown cap closure
US3202307A (en) * 1954-12-31 1965-08-24 Crown Cork & Seal Co Plastic liners
US3235643A (en) * 1962-11-05 1966-02-15 Union Carbide Corp Method and apparatus for molding of articles with finished edges
US3291332A (en) * 1965-09-13 1966-12-13 Morris Virginia Closure device
US3303954A (en) * 1962-03-30 1967-02-14 Grace W R & Co Bonding foamed polystyrene to metal
US3616954A (en) * 1968-05-16 1971-11-02 W H Hutchinson & Son Inc Container closures having a thin transparent central portion and a cellular annular portion
US3828963A (en) * 1972-02-11 1974-08-13 Continental Can Co Recessed crown cap
US3958910A (en) * 1973-08-15 1976-05-25 H-C Industries, Inc. Apparatus for forming closure inserts
EP0025991A1 (en) * 1979-09-21 1981-04-01 H-C Industries, Inc. Composite closure
US4343754A (en) * 1979-09-21 1982-08-10 H-C Industries, Inc. Process and apparatus for molding liners in container closures
EP0037651A3 (en) * 1980-03-21 1982-08-11 Japan Crown Cork Co. Ltd. Molding device for molding a liner on the inside surface of the top panel of a container closure shell
US4378893A (en) * 1979-09-21 1983-04-05 H-C Industries, Inc. Composite closure
US4386123A (en) * 1981-09-28 1983-05-31 Coburn Jr Joseph W Article of manufacture and methods of manufacturing
US4497765A (en) * 1979-09-21 1985-02-05 H-C Industries, Inc. Process for making a closure
US5206043A (en) * 1990-11-30 1993-04-27 W. R. Grace & Co.-Conn. Containers and compositions for sealing them
US5211974A (en) * 1990-09-28 1993-05-18 W. R. Grace & C.-Conn. Containers and compositions for sealing them
US20050224447A1 (en) * 2004-04-13 2005-10-13 Bruce Cleevely Closure with vents for venting during molding of a liner, method of forming a liner in a closure, and device for forming a liner in a closure
RU2437814C2 (ru) * 2006-08-24 2011-12-27 Алкоа Клоужер Системз Интернэшнл, Инк. Облегченная литая пластиковая крышка с повышенной прочностью

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1036084B (de) * 1956-12-12 1958-08-07 Bender Werke G M B H Praegestempel zur Herstellung von aus thermoplastischen Kunststoffen bestehenden Dichtungseinlagen

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US304252A (en) * 1884-08-26 Gael behee
US345962A (en) * 1886-07-20 Thomas f
US713844A (en) * 1902-07-22 1902-11-18 Dayton A Doyle Device for constructing and curing continuous rubber tires.
US827799A (en) * 1905-06-06 1906-08-07 George Frederick Grove Press-tool for the manufacture of push-buttons.
US1087710A (en) * 1912-05-29 1914-02-17 Int Cork Co Machine for the manufacture of bottle-closures.
US1209980A (en) * 1916-02-29 1916-12-26 Clarence J Lawson Bottle-sealing cap.
US1486937A (en) * 1921-09-02 1924-03-18 Thomas L Taliaferro Method of making bottle closures
US1928987A (en) * 1929-12-17 1933-10-03 Crown Cork & Seal Co Bottle cap
USRE19536E (en) * 1935-04-16 parks
GB587355A (en) * 1943-03-22 1947-04-23 Wheeling Stamping Co A plastic hollow cap

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US304252A (en) * 1884-08-26 Gael behee
US345962A (en) * 1886-07-20 Thomas f
USRE19536E (en) * 1935-04-16 parks
US713844A (en) * 1902-07-22 1902-11-18 Dayton A Doyle Device for constructing and curing continuous rubber tires.
US827799A (en) * 1905-06-06 1906-08-07 George Frederick Grove Press-tool for the manufacture of push-buttons.
US1087710A (en) * 1912-05-29 1914-02-17 Int Cork Co Machine for the manufacture of bottle-closures.
US1209980A (en) * 1916-02-29 1916-12-26 Clarence J Lawson Bottle-sealing cap.
US1486937A (en) * 1921-09-02 1924-03-18 Thomas L Taliaferro Method of making bottle closures
US1928987A (en) * 1929-12-17 1933-10-03 Crown Cork & Seal Co Bottle cap
GB587355A (en) * 1943-03-22 1947-04-23 Wheeling Stamping Co A plastic hollow cap

Cited By (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3202307A (en) * 1954-12-31 1965-08-24 Crown Cork & Seal Co Plastic liners
US2981976A (en) * 1956-09-27 1961-05-02 Continental Can Co Molding apparatus
US2910397A (en) * 1956-12-13 1959-10-27 Owens Illinois Glass Co Method of producing closure assembly
US2963738A (en) * 1958-03-28 1960-12-13 Bender Werke G M B H Fa Stamping punch for the manufacture of sealing inserts of thermoplastic artificial material in closing caps for containers, as bottles
US3047910A (en) * 1959-11-24 1962-08-07 Plastomer Dev Corp Method of making thermoplastic tubular container
US3303954A (en) * 1962-03-30 1967-02-14 Grace W R & Co Bonding foamed polystyrene to metal
US3235643A (en) * 1962-11-05 1966-02-15 Union Carbide Corp Method and apparatus for molding of articles with finished edges
US3199705A (en) * 1963-11-04 1965-08-10 Continental Can Co Three-piece easy opening crown cap closure
US3291332A (en) * 1965-09-13 1966-12-13 Morris Virginia Closure device
US3616954A (en) * 1968-05-16 1971-11-02 W H Hutchinson & Son Inc Container closures having a thin transparent central portion and a cellular annular portion
US3828963A (en) * 1972-02-11 1974-08-13 Continental Can Co Recessed crown cap
US3958910A (en) * 1973-08-15 1976-05-25 H-C Industries, Inc. Apparatus for forming closure inserts
EP0025991A1 (en) * 1979-09-21 1981-04-01 H-C Industries, Inc. Composite closure
US4343754A (en) * 1979-09-21 1982-08-10 H-C Industries, Inc. Process and apparatus for molding liners in container closures
US4378893A (en) * 1979-09-21 1983-04-05 H-C Industries, Inc. Composite closure
US4497765A (en) * 1979-09-21 1985-02-05 H-C Industries, Inc. Process for making a closure
EP0037651A3 (en) * 1980-03-21 1982-08-11 Japan Crown Cork Co. Ltd. Molding device for molding a liner on the inside surface of the top panel of a container closure shell
US4386123A (en) * 1981-09-28 1983-05-31 Coburn Jr Joseph W Article of manufacture and methods of manufacturing
US5211974A (en) * 1990-09-28 1993-05-18 W. R. Grace & C.-Conn. Containers and compositions for sealing them
US5206043A (en) * 1990-11-30 1993-04-27 W. R. Grace & Co.-Conn. Containers and compositions for sealing them
US20050224447A1 (en) * 2004-04-13 2005-10-13 Bruce Cleevely Closure with vents for venting during molding of a liner, method of forming a liner in a closure, and device for forming a liner in a closure
US7306108B2 (en) 2004-04-13 2007-12-11 Berry Plastics Corporation Closure with vents for venting during molding of a liner, method of forming a liner in a closure, and device for forming a liner in a closure
RU2437814C2 (ru) * 2006-08-24 2011-12-27 Алкоа Клоужер Системз Интернэшнл, Инк. Облегченная литая пластиковая крышка с повышенной прочностью

Also Published As

Publication number Publication date
NL92618C (cs) 1959-11-16
GB751163A (en) 1956-06-27
FR1105041A (fr) 1955-11-25
BE529212A (cs) 1957-05-24

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