GB1257494A - - Google Patents

Info

Publication number
GB1257494A
GB1257494A GB1257494DA GB1257494A GB 1257494 A GB1257494 A GB 1257494A GB 1257494D A GB1257494D A GB 1257494DA GB 1257494 A GB1257494 A GB 1257494A
Authority
GB
United Kingdom
Prior art keywords
mould
annular
weakened portion
cavity
portions
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
Application number
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 filed Critical
Publication of GB1257494A publication Critical patent/GB1257494A/en
Expired legal-status Critical Current

Links

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
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/46—Means for plasticising or homogenising the moulding material or forcing it into the mould
    • B29C45/56—Means for plasticising or homogenising the moulding material or forcing it into the mould using mould parts movable during or after injection, e.g. injection-compression moulding
    • 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
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/0081—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor of objects with parts connected by a thin section, e.g. hinge, tear line
    • 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
    • B29L2031/565—Stoppers or lids for bottles, jars, or the like, e.g. closures for containers

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)
  • Closures For Containers (AREA)
  • Containers Opened By Tearing Frangible Portions (AREA)

Abstract

1,257,494. Injection moulding. CONTINENTAL CAN CO. Inc. 8 April, 1969 [8 April, 1968], No. 17762/69. Heading B5A. [Also in Division B8] An article having a weakened portion, e.g. an easy-opening container is made by injecting thermoplastic material into two parts of a mould cavity and causing contiguous edges of the two portions of thermoplastic material to fuse together so as to form a line of inherent weakness. As shown in Figs. 1 and 3, an end cap 10 for a container comprises an annular portion 11 joined by a weakened portion 9 to a central removable portion 12. The annular portion 11 is formed by injection through gates 54, 56 and the central portion by simultaneous injection through a gate 55 into a mould 26, 27. Alternatively, valves V 1 , V 2 , V 3 may be used so that one portion of the article is formed before the other. Mould part 27 has an annular rib 50 to form the weakened portion 9. An annular venting chamber 24 is connected by ports 29 to a vacuum source (not shown). The gap (51) between the web 50 and the lower mould part may be so small as to prevent plastic material entering it, in which case the build-up of pressure in the mould cavities is used to cause relative axial shifting of the mould parts when full. Alternatively the gap may be initially completely closed. In Figs. 6 to 8 (not shown), the weakened portion is positioned midway between opposite faces of the can end which may be provided with an annular bead or beads (74, 75 or 84), on the adjacent portions. Fig. 11 shows a mould for making an end cap having a discontinuous weakened portion formed by a rib 124. Injection is effected through a single gate 131, the injected stream dividing into two portions, one to fill the annular cavity 130 and the other the cavity 128. In Fig. 13 the weakened portion is generally cylindrical in form, the annular and central mould cavity portions being displaced axially. Mould portion 157 is movable against the biasing force of springs 161, 162, or fluid motors.
GB1257494D 1968-04-08 1969-04-08 Expired GB1257494A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US71950368A 1968-04-08 1968-04-08

Publications (1)

Publication Number Publication Date
GB1257494A true GB1257494A (en) 1971-12-22

Family

ID=24890320

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1257494D Expired GB1257494A (en) 1968-04-08 1969-04-08

Country Status (7)

Country Link
US (1) US3499572A (en)
JP (1) JPS5224477B1 (en)
DE (1) DE1916910C3 (en)
FR (1) FR2005810A1 (en)
GB (1) GB1257494A (en)
NL (1) NL6905391A (en)
SE (1) SE347460B (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2241663A (en) * 1990-03-06 1991-09-11 Takata Corp Moulding a vehicle air bag cover, incorporating a tear line groove for air bag release
US5147591A (en) * 1989-03-15 1992-09-15 Tenryu Chemical Industry Co., Ltd. Method of producing a lid device for wide-mouthed container
GB2232397B (en) * 1989-06-09 1993-09-08 Akerlund & Rausing Ab A container closure

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE344308B (en) * 1969-04-01 1972-04-10 F Linder
US3567061A (en) * 1969-07-08 1971-03-02 John S Song Easily openable sealed plastic closure method and apparatus
US3981412A (en) * 1971-03-29 1976-09-21 Asmus Richard W Container closure
US3927795A (en) * 1973-03-12 1975-12-23 Buckeye Molding Co Molded article
US4129085A (en) * 1977-03-07 1978-12-12 Klein Gerald B Gated can end with shear offset defining gate and method for manufacture of the same
US4126244A (en) * 1977-08-30 1978-11-21 Owens-Illinois, Inc. Container component with easy-opening wall section
US4434120A (en) * 1981-10-09 1984-02-28 Bell Telephone Laboratories, Incorporated Injection molded knockout
SE435035B (en) * 1982-05-10 1984-09-03 Akerlund & Rausing Ab LONG INSTRUCTION TREATABLE SHARE PART AND PROCEDURE FOR ITS MANUFACTURING
US4830214A (en) * 1985-11-12 1989-05-16 Mt. Vernon Plastics Corporation One-piece molded end closure
US4702387A (en) * 1986-11-24 1987-10-27 Packaging Resources Inc. Container and plastic closure therefor
US4724977A (en) * 1987-05-05 1988-02-16 Acorn Technology Inc. Tamper-evident, reclosable, plastic lid
DE8800462U1 (en) * 1988-01-16 1988-02-25 Bayer Ag, 5090 Leverkusen Lockable test strip container
SE469791B (en) * 1988-02-16 1993-09-13 Akerlund & Rausing Ab Device at end closure for packaging
JPH0452117A (en) * 1990-06-20 1992-02-20 Takata Kk Method for molding module cover of air bag apparatus
US6994355B2 (en) * 2003-10-01 2006-02-07 Infiltrator Systems Inc. Pipe seal
GB201113097D0 (en) * 2011-07-28 2011-09-14 Carbonite Corp Injection moulding plastic components with a slit
GB201620681D0 (en) 2016-12-05 2017-01-18 Plasgad Plastic Products Asc Ltd Containers with tamper indicative hatch for sample removal
EP3581355B1 (en) * 2018-06-12 2020-12-16 Tetra Laval Holdings & Finance S.A. Molding apparatus configured to injection mold an opening device on a sheet of packaging material

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3163317A (en) * 1962-09-24 1964-12-29 R C Can Co Break-away type closure for a container
US3281007A (en) * 1965-01-08 1966-10-25 United Shoe Machinery Corp Container closure devices
US3379364A (en) * 1966-07-07 1968-04-23 Reynolds Metals Co Package means

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5147591A (en) * 1989-03-15 1992-09-15 Tenryu Chemical Industry Co., Ltd. Method of producing a lid device for wide-mouthed container
GB2232397B (en) * 1989-06-09 1993-09-08 Akerlund & Rausing Ab A container closure
GB2241663A (en) * 1990-03-06 1991-09-11 Takata Corp Moulding a vehicle air bag cover, incorporating a tear line groove for air bag release
FR2659267A1 (en) * 1990-03-06 1991-09-13 Takata Corp METHOD FOR MANUFACTURING A MODULAR COVER FOR INFLATABLE BALLOON FOR PROTECTION AGAINST COLLISIONS.
US5149479A (en) * 1990-03-06 1992-09-22 Takata Corporation Method of manufacturing modular cover of air bag
GB2241663B (en) * 1990-03-06 1993-09-22 Takata Corp Method of manufacturing modular cover of air bag

Also Published As

Publication number Publication date
DE1916910A1 (en) 1970-02-19
NL6905391A (en) 1969-10-10
FR2005810A1 (en) 1969-12-19
US3499572A (en) 1970-03-10
JPS5224477B1 (en) 1977-07-01
DE1916910C3 (en) 1974-01-24
DE1916910B2 (en) 1973-06-20
SE347460B (en) 1972-08-07

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PLNP Patent lapsed through nonpayment of renewal fees