Patent US4642252A successfully refreshed from Google Patents.
US4642252A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Body for a pressure-resistant vessel
Assignee: Ajinomoto Co Inc
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Filing: 1985-05-29
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Granted: 1987-02-10
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Expires: 2005-05-29
Abstract
Abstract A body for a pressure-resistant vessel comprising a spirally wound layer formed by a uniaxially stretched film of a crystalline high polymer, e.g., a can. The composite plastic cans according to this invention are useful for holding pressurized carbonated beverages.
Inventors
- 👤 Hitoshi Sasaki
- 👤 Shoji Igota
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 14:42
CPC Classifications
B; B31; B31C; B31C3/00; B65; B65D; B65D3/00; B65D3/22; Y; Y10; Y10S; Y10S428/00; Y10S428/91; Y10T; Y10T428/00; Y10T428/13; Y10T428/1303; Y10T428/1352; Y10T428/1355; Y10T428/1359; Y10T428/24; Y10T428/2419
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
199 words
A pressure-resistant container having a body and metal ends which are high-frequency heat-sealed to the body, said body comprising a cylindrical body which serves as a content-protecting layer and an external shape-retention layer to keep the shape of the container, said content-protecting layer being constructed in such way that a laminate film including three layers comprising polyolefin/gas barrier/plastic is wound on a mandrel in such way that one side edge of the laminate film is folded back outward, with the polyolefin layer inside, and bonded in such way that air bubbles are not entrapped thereunder, and the other edge side of the laminate film is superimposed on and bonded to the folded part in such way that air bubbles are not entrapped between them, characterized in that said laminate film has a uniaxially stretched film of crystalline polymer on the outside of the plastic layer, and/or said shape-retention layer has a layer obtained by spirally winding a uniaxially stretched film of crystalline polymer, said metal ends being coated with at least one polymeric material selected from the group consisting of modified polyolefin, a mixture of modified polyolefin and epoxy-phenol resin, and a mixture of modified polyolefin and epoxy-urea resin.
Claim 2
Dependent Claim
199 words
A pressure-resistant container having a body and metal ends which are high-frequency heat-sealed to the body, said body comprising a cylindrical body which serves as a content-protecting layer and an external shape-retention layer to keep the shape of the container, said content-protecting layer being constructed in such way that a laminate film including three layers comprising polyolefin/gas barrier/plastic is wound on a mandrel in such way that one side edge of the laminate film is folded back outward, with the polyolefin layer inside, and bonded in such way that air bubbles are not entrapped thereunder, and the other edge side of the laminate film is superimposed on and bonded to the folded part in such way that air bubbles are not entrapped between them, characterized in that said laminate film has a uniaxially stretched film of crystalline polymer on the outside of the plastic layer, and/or said shape-retention layer has a layer obtained by spirally winding a uniaxially stretched film of crystalline polymer, said metal ends being coated with at least one polymeric material selected from the group consisting of modified polyolefin, a mixture of modified polyolefin and epoxy-phenol resin, and a mixture of modified polyolefin and epoxy-urea resin.
Claim 3
Dependent Claim
19 words
The container of claim 1 wherein the polymer is selected from the group consisting of polypropylene, polyethylene and nylon.
Claim 4
Dependent Claim
12 words
The container of claim 2 wherein the polyethylene is high density polyethylene.
Claim 5
Dependent Claim
15 words
The container of claim 1 wherein the film is in the form of a tape.
Claim 6
Dependent Claim
17 words
The container of claim 4 wherein the length of the tape corresponds to the direction of stretching.
Claim 7
Dependent Claim
11 words
The container of claim 1 wherein the vessel is a can.
Claim 8
Dependent Claim
12 words
The container of claim 1 wherein the body is hollow and cylindrical.
Claim 9
Dependent Claim
14 words
The container of claim 1, further comprising at least one adhesive layer applied thereon.
Claim 10
Dependent Claim
11 words
The container of claim 1, further comprising an aluminum foil layer.
Claim 11
Dependent Claim
13 words
The container of claim 1, further comprising an unstretched film of a polymer.
Claim 12
Dependent Claim
11 words
The container of claim 1, further comprising a gas barrier layer.
Claim 13
Dependent Claim
10 words
The container of claim 1, further comprising a paper layer.
Claim 14
Dependent Claim
32 words
The pressure-resistant container of claim 1 wherein the shape-retention layer is composed of either a melt extrusion coated resin layer or a layer composed of plastic-laminated cardboard hot-air heat-sealed to the body.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-02-09 | 1990-08-11 | 1991-02-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-02-09 | 1994-08-11 | 1995-02-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-02-09 | 1998-08-11 | 1999-02-10 | $7700.00 | Window Closed / Lapsed |