Patent US4767673A successfully refreshed from Google Patents.
US4767673A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Laminates and formings made from the same
Assignee: Toyo Aluminum KK
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Filing: 1986-10-27
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Granted: 1988-08-30
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Expires: 2006-10-27
Abstract
Abstract Laminates comprising a film of heat-shrinkable synthetic resin and a metallic foil laminated to the resin film through a bonding layer which comprises a discontinuous layer of a synthetic resin which flows at a temperature for heat shrinkage and an adhesive layer which maintains its adhesive strength at that temperature. Upon heat shrinkage, the metallic foil will wrinkle at the portions in contact with the synthetic resin which is not highly adhesive at the temperature for heat shrinkage. The heat-shrunk laminate can be formed into a casing or container such as an electromagentic interference shield, a packaging material, and decorative material.
Inventors
- 👤 Toshihiko Nakano
- 👤 Fumiaki Nagase
- 👤 Eiichi Takeuchi
- 👤 Mamoru Kamada
- 👤 Hideyo Shigematsu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 21:21
CPC Classifications
B; B32; B32B; B32B15/00; B32B15/04; B32B15/08; B32B15/20; B32B7/00; B32B7/04; B32B7/12; B32B7/14; B32B2307/00; B32B2307/70; B32B2307/732; B32B2307/734; B32B2307/736; Y; Y10; Y10S; Y10S428/00; Y10S428/913; Y10T; Y10T428/00; Y10T428/13; Y10T428/1328; Y10T428/1352; Y10T428/24; Y10T428/24802; Y10T428/24851; Y10T428/24917; Y10T428/31504; Y10T428/31551; Y10T428/31565; Y10T428/31573; Y10T428/31576; Y10T428/3158; Y10T428/31587; Y10T428/31605; Y10T428/31652; Y10T428/31663; Y10T428/31667; Y10T428/31678; Y10T428/31681; Y10T428/31692; Y10T428/31725; Y10T428/31736; Y10T428/3175; Y10T428/31786; Y10T428/31797; Y10T428/31855; Y10T428/31909; Y10T428/31913; Y10T428/3192; Y10T428/31928
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
145 words
A laminate produced by laminating at least one film of a heat-shrinkable synthetic resin to at least one side of a metallic foil through a solid bonding layer to form a laminate, and subjecting said laminate to heat shrinkage at a heat shrinkage temperature, characterized in that said solid bonding layer is a composite layer comprising (1) a discontinuous patterned design of a synthetic resin which is in contact with portions of at least one of the two surfaces joined by the solid bonding layer and (2) an adhesive which is in contact with at least portions of both surfaces joined by the solid bonding layer, wherein said synthetic resin flows at said heat-shrinkage temperature and said adhesive maintains its adhesive strength at the heat-shrinkage temperature, and wherein said discontinuous patterned design of synthetic resin and said adhesive form together a solid continuous bonding layer.
Claim 2
Dependent Claim
145 words
A laminate produced by laminating at least one film of a heat-shrinkable synthetic resin to at least one side of a metallic foil through a solid bonding layer to form a laminate, and subjecting said laminate to heat shrinkage at a heat shrinkage temperature, characterized in that said solid bonding layer is a composite layer comprising (1) a discontinuous patterned design of a synthetic resin which is in contact with portions of at least one of the two surfaces joined by the solid bonding layer and (2) an adhesive which is in contact with at least portions of both surfaces joined by the solid bonding layer, wherein said synthetic resin flows at said heat-shrinkage temperature and said adhesive maintains its adhesive strength at the heat-shrinkage temperature, and wherein said discontinuous patterned design of synthetic resin and said adhesive form together a solid continuous bonding layer.
Claim 3
Dependent Claim
31 words
A laminate as claimed in claim 1, wherein at least one side of said metallic foil is covered with a layer of a thermoplastic synthetic resin over the whole surface thereof.
Claim 4
Dependent Claim
30 words
A laminate as claimed in claim 1, further comprising at least one layer of a thermoplastic synthetic resin laminated to at least one side of said laminate after heat shrinkage.
Claim 5
Dependent Claim
15 words
A laminate as claimed in claim 1, wherein said metallic foil is an aluminum foil.
Claim 6
Dependent Claim
23 words
A laminate as claimed in claim 1, wherein said film of a heat-shrinkable synthetic resin has a shrinkage percentage of at least 50%.
Claim 7
Dependent Claim
12 words
A forming produced by forming the laminate as claimed in claim 1.
Claim 8
Dependent Claim
57 words
A forming produced by forming the laminate as claimed in claim 3 into a casing of a conical shape having a bottom wall, a side wall and an annular flange at top, and heating and pressurizing said flange so that said metallic foil at the edge of said flange will be covered with said thermoplastic synthetic resin.
Claim 9
Dependent Claim
30 words
A laminate as claimed in claim 2, further comprising at least one layer of a thermoplastic synthetic resin laminated to at least one side of said laminate after heat shrinkage.
Claim 10
Dependent Claim
12 words
A forming produced by forming the laminate as claimed in claim 2.
Claim 11
Dependent Claim
12 words
A forming produced by forming the laminate as claimed in claim 3.
Claim 12
Dependent Claim
12 words
A forming produced by forming the laminate as claimed in claim 4.
Claim 13
Dependent Claim
12 words
A forming produced by forming the laminate as claimed in claim 5.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-08-30 | 1992-02-29 | 1992-08-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-08-30 | 1996-02-29 | 1996-08-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-08-30 | 2000-02-29 | 2000-08-30 | $7700.00 | Window Closed / Lapsed |