Patent US4646925A successfully refreshed from Google Patents.
US4646925A
Expired / Lapsed
US
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Multi-layer preform for draw-blow forming a bottle
Assignee: Toyo Seikan Group Holdings Ltd
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Filing: 1984-09-28
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Granted: 1987-03-03
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Expires: 2004-09-28
Abstract
Abstract Disclosed is a multi-layer preform for the production of a bottle by draw-blow forming, which comprises a neck portion having an open end, a part for engagement with a lid member and, if necessary, a supporting ring, and a thick barrel portion to be drawn and a closed bottom portion, wherein the neck portion and inner walls of the bottom and barrel portions are integrally formed of a thermoplastic polyester, a thin intermediate layer composed of a gas-barrier thermoplastic resin is formed on the inner walls of the barrel and bottom portions so that the top end of the intermediate layer is extended to the point just below the neck portion, an outer layer of a thermoplastic polyester is formed in such a positional relation that the outer layer covers the intermediate layer, and a joint is formed directly or through the intermediate layer between the outer layer and the neck portion just below the neck portion.
Inventors
- 👤 Shigezo Nohara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:48
CPC Classifications
B; B29; B29C; B29C45/00; B29C45/16; B29C45/1642; B29C45/1643; B29C45/1684; B65; B65D; B65D1/00; B65D1/02; B65D1/0207; B65D1/0215; B29C45/1646; B29C2045/1648; B29C2949/00; B29C2949/07; B29C2949/081; B29C2949/0811; B29C2949/0819; B29C2949/20; B29C2949/22; B29C2949/24; B29C2949/30; B29C2949/3016; B29C2949/3018; B29C2949/302; B29C2949/3024; B29C2949/3026; B29C2949/3028; B29C2949/3032; B29C2949/3034; B29C2949/3036; B29K; B29K2023/00; B29K2023/04; B29K2023/06; B29K2067/00; B29K2105/00; B29K2105/25; B29K2105/253; B29K2623/00; B29K2623/04; B29K2623/06; B29K2667/00; B29K2995/00; B29K2995/0037; B29K2995/0068; B29K2995/0069; Y; Y10; Y10T; Y10T428/00; Y10T428/13; Y10T428/1352; Y10T428/1379; Y10T428/1383
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
148 words
A multi-layer preform for the production of a bottle by draw-blow forming, which comprises a neck portion, a thick barrel portion to be drawn and a closed bottom portion, wherein the neck portion and an inner layer of the bottom and barrel portions are integrally formed of a thermoplastic polyester, a thin intermediate layer composed of a gas-barrier thermoplastic resin on the inner layer of the barrel and bottom portions with the top end of the intermediate layer extended to a point just below the neck portion and an outer layer of a thermoplastic polyester in such a positional relation that the outer layer covers the intermediate layer with a fusion-bond joint between the outer layer and the neck portion located just below the neck portion; the intermediate layer of the gas-barrier resin thereby being completely sealed and surrounded by the thermoplastic polyester inner layer and outer layer.
Claim 2
Dependent Claim
148 words
A multi-layer preform for the production of a bottle by draw-blow forming, which comprises a neck portion, a thick barrel portion to be drawn and a closed bottom portion, wherein the neck portion and an inner layer of the bottom and barrel portions are integrally formed of a thermoplastic polyester, a thin intermediate layer composed of a gas-barrier thermoplastic resin on the inner layer of the barrel and bottom portions with the top end of the intermediate layer extended to a point just below the neck portion and an outer layer of a thermoplastic polyester in such a positional relation that the outer layer covers the intermediate layer with a fusion-bond joint between the outer layer and the neck portion located just below the neck portion; the intermediate layer of the gas-barrier resin thereby being completely sealed and surrounded by the thermoplastic polyester inner layer and outer layer.
Claim 3
Dependent Claim
18 words
A multi-layer preform as set forth in claim 1, wherein the gas-barrier resin is an ethylene-vinyl alcohol copolymer.
Claim 4
Dependent Claim
21 words
The multi-layer preform of claim 1 wherein an adhesive resin is incorporated into the thermoplastic resin constituting the gas-barrier intermediate layer.
Claim 5
Dependent Claim
27 words
The multi-layer preform of claim 3 wherein the adhesive resin is selected from the group consisting of urethane resins, polyester-ethers, polyester amides, and acid modified olefin resins.
Claim 6
Dependent Claim
20 words
The multi-layer preform of claim 1 wherein the intermediate layer has a thickness of 3 to 30μ after draw-blow forming.
Claim 7
Dependent Claim
31 words
The multi-layer preform of claim 1 wherein an adhesive resin layer is formed on the surface of the intermediate layer and has a thickness of 0.5 to 15μ after draw-blow forming.
Claim 8
Dependent Claim
28 words
The multi-layer preform of claim 6 wherein the adhesive resin is selected from the group consisting of urethane resins, polyester ethers, polyester amides, and acid modified olefin resin.
Claim 9
Dependent Claim
23 words
The multi-layer preform of claim 1 wherein the inner and outer surface layers each have thicknesses of 800 to 40μ after draw-blow forming.
Claim 10
Dependent Claim
36 words
The multi-layer preform of claim 1 wherein the intermediate layer gas-barrier resin is selected from the group consisting of a mixture of ethylene-vinyl alcohol copolymer and a nylon resin, a high-nitrile resin and a vinylidenechloride resin.
References Cited (Backward Citations)
US3221954A
Cited
US3561629A
Cited
US3878282A
Cited
US4079850A
Cited
US4149645A
Cited
US4174413A
Cited
US4256231A
Cited
US4107362A
Cited
US4174783A
Cited
US4267143A
Cited
US4307137A
Cited
WO1981000230A1
Cited
JPS5677144A
Cited
US4370368A
Cited
US4370368B1
Cited
US4391861A
Cited
US4535901A
Cited
US4392576A
Cited
US4483891A
Cited
US4501781A
Cited
US4528219A
Cited
US4451512A
Cited
US4550043A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-03-02 | 1990-09-01 | 1991-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-03-02 | 1994-09-01 | 1995-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-03-02 | 1998-09-01 | 1999-03-03 | $7700.00 | Window Closed / Lapsed |