CA2025176C - Plastic closure with compression molded sealing liner - Google Patents
Plastic closure with compression molded sealing liner Download PDFInfo
- Publication number
- CA2025176C CA2025176C CA002025176A CA2025176A CA2025176C CA 2025176 C CA2025176 C CA 2025176C CA 002025176 A CA002025176 A CA 002025176A CA 2025176 A CA2025176 A CA 2025176A CA 2025176 C CA2025176 C CA 2025176C
- Authority
- CA
- Canada
- Prior art keywords
- vinyl acetate
- closure
- composition
- ethylene vinyl
- set forth
- 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
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
- 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
- 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
- B65D41/045—Discs
-
- 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
- B29C43/183—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 the preformed layer being a lining, e.g. shaped in the mould before compression moulding, or a preformed shell adapted to the shape of the mould
- B29C43/184—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 the preformed layer being a lining, e.g. shaped in the mould before compression moulding, or a preformed shell adapted to the shape of the mould shaped by the compression of the material during moulding
-
- 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
Abstract
A plastic closure comprising a base wall, a peripheral skirt, means on said skirt adapted to attach the closure to a container, and a sealing liner compression molded in situ on the interior of the base wall of the closure, said sealing liner comprising a blend of an ethylene vinyl acetate composition and a thermoplastic elastomeric composition.
Description
This invention relates to compression molded plastic closures and particular compression molded plastic closures having compression molded liners therein.
Background and Su~mnary of the Invention Plastic closures have been commonly made by injection molding or compression molding. In plastic closures made by compression molding as shown, for example, in U.S.
Patent Nos. 3,210,805, 4,434,754, and 4,418,828, it is also common to compression mold a sealing liner in place in the closure after the closure has been formed. Such sealing liners may comprise polyvinyl chloride plastic or thermoplastic elastomeric compositions. Polyvinyl chloride has a tendency to overheat during extrusion and further has inherent problems because of the removal torque when the sealing liner is used on a PET container. Thermoplastic polymeric compositions are more expensive, more difficult to produce in that the compounding necessary results in inconsistent quality and consistency. Furthermore, such compositions produce problems of torque removal on glass containers. United States patents 4,807,772 and 4,846,362 disclose a compression molded liner being made of a blend of polyethylene or polypropylene and thermoplastic elastomeric copolymer so that the liner is removable.
As a result of the problems with both types of compositions, it has been necessary for a user to maintain costly inventories of closures with both types of sealing liners.
,1 V~ t,~
.J -d .~
in order to accommodate use with both plastic and glass containers.
In order to produce a satisfactory sealing liner 'that would be applicable to both plastic and glass containers, it must be necessary to not only formulate the composition but also consistently extrude and cut off charges of the composition for compression molding in ;apparatus such as shown, for example, in U.S. Patent Nos. 3,955,605, 4,080,136 and 4,277,431. ~Phe closure must also match other closure requirements including 1o satisfactory removal torques, carbonation retention, carbonation retention under top load and satisfactory functioning on a container when cycled through environmental changes of temperature and humidity, Accardingly, among the objectives of the present 15 invention are to provide a compression molded plastic closure having a compression molded sealing liner which will overcome the problems inherent in the prior sealing liners; which will operate satisfactorily on both plastic and glass containers;
which is relatively lower in cost; and which can be readily Zo processed and meet the requirements for a satisfactory closure.
Description of the Drawis~~
FIG. 1 is an elevational view of a closure embodying the invention.
FIG. 2 is a sectional view o:E the closure embodying 25 the invention.
Background and Su~mnary of the Invention Plastic closures have been commonly made by injection molding or compression molding. In plastic closures made by compression molding as shown, for example, in U.S.
Patent Nos. 3,210,805, 4,434,754, and 4,418,828, it is also common to compression mold a sealing liner in place in the closure after the closure has been formed. Such sealing liners may comprise polyvinyl chloride plastic or thermoplastic elastomeric compositions. Polyvinyl chloride has a tendency to overheat during extrusion and further has inherent problems because of the removal torque when the sealing liner is used on a PET container. Thermoplastic polymeric compositions are more expensive, more difficult to produce in that the compounding necessary results in inconsistent quality and consistency. Furthermore, such compositions produce problems of torque removal on glass containers. United States patents 4,807,772 and 4,846,362 disclose a compression molded liner being made of a blend of polyethylene or polypropylene and thermoplastic elastomeric copolymer so that the liner is removable.
As a result of the problems with both types of compositions, it has been necessary for a user to maintain costly inventories of closures with both types of sealing liners.
,1 V~ t,~
.J -d .~
in order to accommodate use with both plastic and glass containers.
In order to produce a satisfactory sealing liner 'that would be applicable to both plastic and glass containers, it must be necessary to not only formulate the composition but also consistently extrude and cut off charges of the composition for compression molding in ;apparatus such as shown, for example, in U.S. Patent Nos. 3,955,605, 4,080,136 and 4,277,431. ~Phe closure must also match other closure requirements including 1o satisfactory removal torques, carbonation retention, carbonation retention under top load and satisfactory functioning on a container when cycled through environmental changes of temperature and humidity, Accardingly, among the objectives of the present 15 invention are to provide a compression molded plastic closure having a compression molded sealing liner which will overcome the problems inherent in the prior sealing liners; which will operate satisfactorily on both plastic and glass containers;
which is relatively lower in cost; and which can be readily Zo processed and meet the requirements for a satisfactory closure.
Description of the Drawis~~
FIG. 1 is an elevational view of a closure embodying the invention.
FIG. 2 is a sectional view o:E the closure embodying 25 the invention.
~ ~ y) r>
~, '1~ ~ ~~ ~FI. ~ i4 S
Description Referring to FIGS. 1 and 2, the plastic closure 10 of suitable material such as polypropylene embodying the invention comprises a base wall 11, a peripheral skirt 12 having internal threads 13 for engagement with complementary threads on a container C and a sealing .liner S in the form of an annular shape at the juncture of the base wall 11 and peripheral skirt 12.
fhe closure may include tamper indicating means 15 such as shown, for example, in U.S. Patents 4,418,828, 9,613,052 and 4,653,657.
In accordance with the invention, the sealing liner comprises a composition of a blend of ethylene vinyl acetate composition and a thermoplastic elastomeric composition.
The ethylene vinyl acetate composition comprises polyethylene as the major constituent and vinyl acetate and optionally includes antioxidants and pigments. The thermoplastic elastomeric composition preferably comprises polypropylene or polyolefin as a major constituent and styrene butadiene-styrene and optionally includes antioxidants and pigments.
The ethylene vinyl acetate composition may have the composition within about the following ranges, by weight:
Polyethylene F15'k to 91~
Vinyl acetate 9~ to 15~
z5 The thermoplastic elastomeric composition may have the following composition:
Polypropylene or polyolefin 20~ to 60~
Styrene butadiene styrene 90~ to t30~
~, '1~ ~ ~~ ~FI. ~ i4 S
Description Referring to FIGS. 1 and 2, the plastic closure 10 of suitable material such as polypropylene embodying the invention comprises a base wall 11, a peripheral skirt 12 having internal threads 13 for engagement with complementary threads on a container C and a sealing .liner S in the form of an annular shape at the juncture of the base wall 11 and peripheral skirt 12.
fhe closure may include tamper indicating means 15 such as shown, for example, in U.S. Patents 4,418,828, 9,613,052 and 4,653,657.
In accordance with the invention, the sealing liner comprises a composition of a blend of ethylene vinyl acetate composition and a thermoplastic elastomeric composition.
The ethylene vinyl acetate composition comprises polyethylene as the major constituent and vinyl acetate and optionally includes antioxidants and pigments. The thermoplastic elastomeric composition preferably comprises polypropylene or polyolefin as a major constituent and styrene butadiene-styrene and optionally includes antioxidants and pigments.
The ethylene vinyl acetate composition may have the composition within about the following ranges, by weight:
Polyethylene F15'k to 91~
Vinyl acetate 9~ to 15~
z5 The thermoplastic elastomeric composition may have the following composition:
Polypropylene or polyolefin 20~ to 60~
Styrene butadiene styrene 90~ to t30~
~~ '~l ~',3 ~~ ~~ ~:>
A preferred composition of the ethylene vinyl acetate composition comprises:
Polyethylene 88~
Vinyl acetate 12~
The amount of antioxidant lubricants and colorants may be used as required. Antioxidant are normally added to facilitate regrind and reuse of the plastic. Lubricants are adhered to be used as release agents in molding the plastic closure.
Excellent results have been achieved in tests wherein the percentage of ethylene vinyl acetate composition and percentage of thermoplastic. elastomeric composition comprise 80~-20~; 75~-25$; and 70~-30$. It has been found that compositions made in accordance with the invention can be 15 consistently extruded, cut and compression molded in a plastic closure. It has been further found that the sealing liner in such a closure satisfactorily provides a seal with optimal removal torque characteristics on both plastic and glass containers.
z0 Satisfactory results have been achieved in meAting closure requirements including satisfactory removal to.rques, carbonation retention, carbonation retention under top load and satisfactory functioning on a container when cycled through environmenc.al changes of temperature and humidity.
_ ,.a ,: ym ;-:, %~ ~i;/ ~~ . ri I :.,f Y<1 Tt can thus be seen that there has been provided a compression molded sealing liner which will overcome the problems inherent in the prior sealing liners; which will operate satisfactorily on both plastic and glass containers; which is relatively lower in cost; and which can be readily processed and meet the requirements for a satisfactory closure.
A preferred composition of the ethylene vinyl acetate composition comprises:
Polyethylene 88~
Vinyl acetate 12~
The amount of antioxidant lubricants and colorants may be used as required. Antioxidant are normally added to facilitate regrind and reuse of the plastic. Lubricants are adhered to be used as release agents in molding the plastic closure.
Excellent results have been achieved in tests wherein the percentage of ethylene vinyl acetate composition and percentage of thermoplastic. elastomeric composition comprise 80~-20~; 75~-25$; and 70~-30$. It has been found that compositions made in accordance with the invention can be 15 consistently extruded, cut and compression molded in a plastic closure. It has been further found that the sealing liner in such a closure satisfactorily provides a seal with optimal removal torque characteristics on both plastic and glass containers.
z0 Satisfactory results have been achieved in meAting closure requirements including satisfactory removal to.rques, carbonation retention, carbonation retention under top load and satisfactory functioning on a container when cycled through environmenc.al changes of temperature and humidity.
_ ,.a ,: ym ;-:, %~ ~i;/ ~~ . ri I :.,f Y<1 Tt can thus be seen that there has been provided a compression molded sealing liner which will overcome the problems inherent in the prior sealing liners; which will operate satisfactorily on both plastic and glass containers; which is relatively lower in cost; and which can be readily processed and meet the requirements for a satisfactory closure.
Claims (15)
1. A plastic closure comprising a base wall, a peripheral skirt, means on said skirt adapted to attach the closure to a container, and a sealing liner compression molded in situ on the interior of the base wall of the closure, said sealing liner comprising a blend of an ethylene vinyl acetate composition and a thermoplastic elastomeric composition, said ethylene vinyl acetate composition comprises the major constituent of the liner.
2. The closure set forth in claim 1 wherein the ethylene vinyl acetate composition comprises at least 70%
by weight of the liner composition.
by weight of the liner composition.
3. The closure set forth in claim 2 wherein said ethylene vinyl acetate composition comprises polyethylene as the major constituent and vinyl acetate.
4. The closure set forth in claim 3 wherein said vinyl acetate comprises 9-15% by weight of the ethylene vinyl acetate composition.
5. The closure set forth in claim 4 wherein the vinyl acetate comprises 12% by weight of the ethylene vinyl acetate composition.
6. The closure set forth in claim 1 wherein the ethylene vinyl acetate composition comprises about 70% to 80% by weight and the thermoplastic elastomeric composition comprises 20% to 30% by weight.
7. The closure set forth in any one of claims 1-6 wherein said thermoplastic elastomeric composition comprises an olefin and styrene butadiene styrene.
8. The closure set forth in any one of claims 1-6 wherein said ethylene vinyl acetate composition and said thermoplastic olefin composition comprise antioxidants and coloring pigments.
9. A plastic closure comprising a base wall, a peripheral skirt, means on said skirt adapted to attach the closure to a container, and a sealing liner compression molded in situ on the interior of the base wall of the closure, said sealing liner comprising a blend of an ethylene vinyl acetate composition and a thermoplastic elastomeric composition, said ethylene vinyl acetate composition comprises at least 70% by weight of the liner composition, said closure operating satisfactorily on both plastic and glass containers.
10. The closure set forth in claim 9 wherein the ethylene vinyl acetate composition comprises polyethylene as the major constituent and vinyl acetate.
11. The closure set forth in claim 10, wherein said vinyl acetate comprises 9-15% by weight of the ethylene vinyl acetate composition.
12. The closure set forth in claim 11, wherein the vinyl acetate comprises 12% by weight of the ethylene vinyl-acetate composition.
13. The closure set forth in claim 9 wherein the ethylene vinyl acetate composition comprises about 70% to 80% by weight and the thermoplastic elastomeric composition comprises 20% to 30% by weight.
14. The closure set forth in any one of claims 9-13 wherein said thermoplastic elastomeric composition comprises an olefin and styrene butadiene styrene.
15. The closure set forth in any one of claims 9-13 wherein said ethylene vinyl acetate composition and said thermoplastic olefin composition comprise antioxidants and coloring pigments.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US07/416,620 | 1989-10-03 | ||
| US07/416,620 US4984703A (en) | 1989-10-03 | 1989-10-03 | Plastic closure with compression molded sealing liner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2025176A1 CA2025176A1 (en) | 1991-04-04 |
| CA2025176C true CA2025176C (en) | 2002-09-10 |
Family
ID=23650665
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002025176A Expired - Lifetime CA2025176C (en) | 1989-10-03 | 1990-09-12 | Plastic closure with compression molded sealing liner |
Country Status (12)
| Country | Link |
|---|---|
| US (1) | US4984703A (en) |
| EP (1) | EP0421620B1 (en) |
| JP (1) | JP2660765B2 (en) |
| AT (1) | ATE114588T1 (en) |
| AU (1) | AU622832B2 (en) |
| CA (1) | CA2025176C (en) |
| DE (1) | DE69014536T2 (en) |
| DK (1) | DK0421620T3 (en) |
| ES (1) | ES2064654T3 (en) |
| GR (1) | GR3015187T3 (en) |
| MX (1) | MX166993B (en) |
| ZA (1) | ZA907219B (en) |
Families Citing this family (32)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5064084A (en) * | 1990-08-27 | 1991-11-12 | H-C Industries, Inc. | Composite closure with seal proportioning lip |
| US5289932A (en) * | 1992-04-15 | 1994-03-01 | Canada Plastic Containers Limited | Closure cap with plastic liner |
| US5346088A (en) * | 1992-11-18 | 1994-09-13 | Brimo Ii Joseph | Reusable beverage can cap |
| US5306542A (en) * | 1993-02-11 | 1994-04-26 | Owens-Illinois Closure Inc. | Plastic closure with compression molded sealing liner |
| EP0656043B1 (en) * | 1993-06-21 | 1998-10-14 | Shell Oil Company | Plastic closure liners and closures |
| EP0714427B1 (en) * | 1993-08-18 | 1999-06-16 | The Dow Chemical Company | Gaskets made from homogeneous linear olefin polymers |
| US5929128A (en) * | 1993-08-18 | 1999-07-27 | The Dow Chemical Company | Gaskets made from olefin polymers |
| CA2129764A1 (en) * | 1993-12-23 | 1995-06-24 | John W. Bayer | Closure construction for hot fill and retort applications |
| DE19529230A1 (en) * | 1995-08-09 | 1997-05-15 | Basf Lacke & Farben | Mechanically sealing closure for vessels |
| IT239673Y1 (en) * | 1996-03-01 | 2001-03-13 | Alplast Spa | SCREW CAPS OF PLASTIC MATERIAL |
| US5947311A (en) * | 1997-05-06 | 1999-09-07 | Owens-Illinois Closure Inc. | Plastic closure with liner having a periphery spaced from the skirt of the closure and a sealing surface angled axially with respect to the base wall of the closure |
| US6399170B1 (en) * | 1997-12-24 | 2002-06-04 | Owens-Illinois Closure Inc. | Plastic closure with compression molded barrier liner |
| US6371318B1 (en) * | 1997-12-24 | 2002-04-16 | Owens-Illinois Closure Inc. | Plastic closure with compression molded sealing/barrier liner |
| KR100352785B1 (en) | 1998-03-10 | 2002-09-16 | 미쓰이 가가쿠 가부시키가이샤 | Ethylene copolymer composition and use thereof |
| US6119883A (en) | 1998-12-07 | 2000-09-19 | Owens-Illinois Closure Inc. | Tamper-indicating closure and method of manufacture |
| CA2305227A1 (en) | 1999-04-27 | 2000-10-27 | James L. Gregory | Lined closure for containers of differing finish configurations |
| US6253940B1 (en) | 1999-04-28 | 2001-07-03 | Owens-Illinois Closure Inc. | Tamper-indicating closure and method of manufacture |
| US6382443B1 (en) | 1999-04-28 | 2002-05-07 | Owens-Illinois Closure Inc. | Tamper-indicating closure with lugs on a stop flange for spacing the flange from the finish of a container |
| US6152316A (en) | 1999-05-17 | 2000-11-28 | Owens-Illinois Closure Inc. | Tamper-indicating closure and method of manufacture |
| CA2314592A1 (en) | 1999-09-01 | 2001-03-01 | Owens-Illinois Closure Inc. | Multi-layer plastic closure with barrier properties |
| US6382440B1 (en) | 2000-03-10 | 2002-05-07 | Alcoa Closure Systems International | Closure having raised sidewall display elements |
| US6660349B1 (en) | 2000-09-29 | 2003-12-09 | Owens-Illinois Closure Inc. | Plastic closure with compression molded layered barrier liner |
| MD20010345A (en) * | 2001-08-17 | 2003-06-30 | Феликс ШЕПЕЛЬ | Process for processing of the clary sage Salvia sclarea vegetal mass and application thereof in the treatment of the locomotor apparatus |
| US20030098286A1 (en) | 2001-11-27 | 2003-05-29 | Bloom Kenneth S. | Plastic closure, method of manufacture, and closure and container package for high-temperature applications |
| MD2193C2 (en) * | 2001-12-28 | 2003-12-31 | Анатоль ЕФКАРПИДИС | Composition for manufacture of corks |
| MD2404G2 (en) * | 2003-10-17 | 2004-09-30 | Уиспак, Сочиетате Ку Рэспундере Лимитатэ | Composition for corks manufacturing |
| GB2412366B (en) * | 2004-03-24 | 2006-09-06 | Spreckelsen Mcgeough Ltd | Closure with integral gas barrier |
| 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 |
| US7790826B2 (en) * | 2004-05-06 | 2010-09-07 | DowGlobal Technologies Inc. | Polymer molding compositions |
| US7867425B2 (en) * | 2004-08-11 | 2011-01-11 | Rexam Closure Systems Inc. | Closure with liner seal vents |
| US8552117B1 (en) | 2012-06-13 | 2013-10-08 | Teknor Apex Company | Sealing elements and sealing element compositions |
| KR101629798B1 (en) * | 2014-06-03 | 2016-06-13 | 목포대학교산학협력단 | Method for preventing the ship collision using both satellite communications and ad-hoc communications |
Family Cites Families (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2072536A (en) * | 1932-09-07 | 1937-03-02 | Union Carbide & Carbon Corp | Closure |
| US2131319A (en) * | 1933-01-03 | 1938-09-27 | Crown Cork & Seal Co | Method and apparatus for making composite caps |
| US3210805A (en) * | 1961-02-28 | 1965-10-12 | Hanai Mikihiko | Molding machines |
| US3866845A (en) * | 1973-05-18 | 1975-02-18 | Klm Company | Container closure with liner and methods of making the same |
| JPS582825B2 (en) * | 1977-11-17 | 1983-01-18 | 日本クラウンコルク株式会社 | Olefin resin-metal adhesive structure and its manufacturing method |
| JPS5926539B2 (en) * | 1978-08-22 | 1984-06-28 | 日本クラウンコルク株式会社 | Container lid with peelable liner |
| US4343754A (en) * | 1979-09-21 | 1982-08-10 | H-C Industries, Inc. | Process and apparatus for molding liners in container closures |
| US4497765A (en) * | 1979-09-21 | 1985-02-05 | H-C Industries, Inc. | Process for making a closure |
| US4378893A (en) * | 1979-09-21 | 1983-04-05 | H-C Industries, Inc. | Composite closure |
| JPS57167835U (en) * | 1981-04-18 | 1982-10-22 | ||
| US4418828A (en) * | 1981-07-24 | 1983-12-06 | H-C Industries, Inc. | Plastic closure with mechanical pilfer band |
| US4507405A (en) * | 1982-06-17 | 1985-03-26 | The Coca-Cola Company | Synthetic articles having a cork-like appearance |
| JPS5915060A (en) * | 1982-07-19 | 1984-01-26 | 日本クラウンコルク株式会社 | Vessel cover made of synthetic resin having pilfer-proof characteristic |
| DE3519053A1 (en) * | 1985-05-28 | 1986-12-18 | W.R. Grace & Co., Cambridge, Mass. | CAULK |
| US4721221A (en) * | 1987-01-20 | 1988-01-26 | Owens-Illinois Closure Inc. | Molded plastic closure with sealing liner |
| US4845362A (en) * | 1988-02-02 | 1989-07-04 | North American Philips Corporation | In situ differential imaging and method utilizing a scanning electron microscope |
| US4807772A (en) * | 1988-03-04 | 1989-02-28 | Owens-Illinois Closure Inc. | Polypropylene closure with removable liner |
| GB8808890D0 (en) * | 1988-04-15 | 1988-05-18 | Grace W R & Co | Container closure caps & compositions for forming gaskets for them |
-
1989
- 1989-10-03 US US07/416,620 patent/US4984703A/en not_active Expired - Lifetime
-
1990
- 1990-09-11 ZA ZA907219A patent/ZA907219B/en unknown
- 1990-09-11 AU AU62395/90A patent/AU622832B2/en not_active Ceased
- 1990-09-12 CA CA002025176A patent/CA2025176C/en not_active Expired - Lifetime
- 1990-09-14 DK DK90310077.4T patent/DK0421620T3/en active
- 1990-09-14 ES ES90310077T patent/ES2064654T3/en not_active Expired - Lifetime
- 1990-09-14 DE DE69014536T patent/DE69014536T2/en not_active Revoked
- 1990-09-14 EP EP90310077A patent/EP0421620B1/en not_active Revoked
- 1990-09-14 AT AT90310077T patent/ATE114588T1/en not_active IP Right Cessation
- 1990-09-17 JP JP2244128A patent/JP2660765B2/en not_active Expired - Fee Related
- 1990-09-19 MX MX022455A patent/MX166993B/en unknown
-
1995
- 1995-02-27 GR GR950400397T patent/GR3015187T3/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| ZA907219B (en) | 1991-07-31 |
| ES2064654T3 (en) | 1995-02-01 |
| CA2025176A1 (en) | 1991-04-04 |
| EP0421620A1 (en) | 1991-04-10 |
| AU6239590A (en) | 1991-06-27 |
| AU622832B2 (en) | 1992-04-16 |
| ATE114588T1 (en) | 1994-12-15 |
| GR3015187T3 (en) | 1995-05-31 |
| US4984703A (en) | 1991-01-15 |
| MX166993B (en) | 1993-02-19 |
| DE69014536D1 (en) | 1995-01-12 |
| JPH03124570A (en) | 1991-05-28 |
| EP0421620B1 (en) | 1994-11-30 |
| DK0421620T3 (en) | 1995-01-23 |
| JP2660765B2 (en) | 1997-10-08 |
| DE69014536T2 (en) | 1995-04-13 |
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