Patent US4469741A successfully refreshed from Google Patents.
US4469741A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Laminated sheets
Assignee: Fujifilm Holdings Corp
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Filing: 1981-11-04
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Granted: 1984-09-04
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Expires: 2001-11-04
Abstract
Abstract A laminated sheet is described, which comprises a porous sheet, and a uniaxially molecularly-orientated thermoplastic resin film bonded onto at least one side of the porous sheet through an adhesive layer. This laminated sheet has excellent physical strength and cushioning characteristics. Incorporation of a light-shielding substance into the laminated sheet makes it suitable for use as a wrapping material for light-sensitive materials.
Inventors
- 👤 Mutsuo Akao
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 04:26
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/06; B32B27/065; B32B5/00; B32B5/18; B32B15/00; B32B15/04; B32B15/08; B32B27/08; B32B27/10; B32B27/12; B32B7/00; B32B7/04; B32B7/12; B32B2266/00; B32B2266/02; B32B2266/0214; B32B2266/0221; B32B2266/0228; B32B2266/0235; B32B2266/025; B32B2266/0278; B32B2439/00; B32B2439/40; B32B2439/46; B32B2553/00; Y; Y10; Y10S; Y10S428/00; Y10S428/91; Y10T; Y10T428/00; Y10T428/24; Y10T428/24273; Y10T428/24322; Y10T428/24331; Y10T428/24942; Y10T428/2495; Y10T428/24959; Y10T428/249921; Y10T428/249953; Y10T428/249982; Y10T428/249987; Y10T428/249991; Y10T428/249992; Y10T428/31504; Y10T428/31551; Y10T428/31573; Y10T428/31587; Y10T428/31855; Y10T428/31909; Y10T428/31913; Y10T428/3192
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
95 words
A laminated sheet, comprising: a first uniaxially molecularly-orientated thermoplastic resin film orientated in a first direction; a first adhesive layer bonded to said first film; a porous sheet bonded to said first adhesive layer; a second adhesive layer bonded to said porous sheet; and a second uniaxially molecularly-orientated thermoplastic resin film bonded to said second adhesive layer in such a manner that its molecularly-orientated direction crosses said first direction of said first film at an angle of 45° to 90°, wherein said first and second adhesive layers have a thickness of 7 microns or more.
Claim 2
Dependent Claim
95 words
A laminated sheet, comprising: a first uniaxially molecularly-orientated thermoplastic resin film orientated in a first direction; a first adhesive layer bonded to said first film; a porous sheet bonded to said first adhesive layer; a second adhesive layer bonded to said porous sheet; and a second uniaxially molecularly-orientated thermoplastic resin film bonded to said second adhesive layer in such a manner that its molecularly-orientated direction crosses said first direction of said first film at an angle of 45° to 90°, wherein said first and second adhesive layers have a thickness of 7 microns or more.
Claim 3
Dependent Claim
29 words
A laminated sheet as claimed in claim 1, wherein said uniaxially molecularly-orientated thermoplastic resin films are comprised of high-density polyethylene having a density of 0.94 g/cm 3 or more.
Claim 4
Dependent Claim
30 words
A laminated sheet as claimed in claim 1, wherein said porous sheet is comprised of a material selected from the group consisting of styrene, olefin, vinyl chloride, and polyurethane-based resins.
Claim 5
Dependent Claim
19 words
A laminated sheet as claimed in claim 3, wherein said material of said porous sheet includes a foaming agent.
Claim 6
Dependent Claim
33 words
A laminated sheet as claimed in claim 1, further comprising: a third adhesive layer bonded to said first uniaxially molecularly-orientated thermoplastic resin film; and a flexible sheet bonded to said third adhesive layer.
Claim 7
Dependent Claim
32 words
A laminated sheet as claimed in claim 5, wherein said flexible sheet is a material selected from the group consisting of plastic film, cellophane, aluminum foil, paper, cloth or an unwoven fabric.
Claim 8
Dependent Claim
116 words
A flexible laminated sheet, comprising: a first uniaxially molecularly-orientated thermoplastic resin film from 15 μm to 100 μm thick orientated in a first direction; a first adhesive layer from 7 μm to 50 μm thick bonded to said first film; a porous sheet of from 0.2 mm to 10 mm thick bonded to said first adhesive layer; a second adhesive layer from 7 μm to 50 μm thick bonded to said porous sheet; and a second uniaxially molecularly-orientated thermoplastic film from 15 μm to 100 μm thick bonded to said second adhesive layer in such a manner that its molecularly-orientated direction crosses said first direction of said first film at an angle of 45° to 90°.
Claim 9
Dependent Claim
116 words
A flexible laminated sheet, comprising: a first uniaxially molecularly-orientated thermoplastic resin film from 15 μm to 100 μm thick orientated in a first direction; a first adhesive layer from 7 μm to 50 μm thick bonded to said first film; a porous sheet of from 0.2 mm to 10 mm thick bonded to said first adhesive layer; a second adhesive layer from 7 μm to 50 μm thick bonded to said porous sheet; and a second uniaxially molecularly-orientated thermoplastic film from 15 μm to 100 μm thick bonded to said second adhesive layer in such a manner that its molecularly-orientated direction crosses said first direction of said first film at an angle of 45° to 90°.
Claim 10
Dependent Claim
115 words
A flexible laminated sheet, comprising: a first uniaxially molecularly-orientated thermoplastic resin film from 20 μm to 70 μm thick orientated in a first direction; a first adhesive layer from 10 μm to 30 μm thick bonded to said first film; a porous sheet from 0.7 mm to 6 mm thick bonded to said first adhesive layer; a second adhesive layer from 10 μm to 30 μm thick bonded to said porous sheet; and a second uniaxially molecularly-orientated thermoplastic film from 20 μm to 70 μm thick bonded to said second adhesive layer in such a manner that its molecularly-orientated direction crosses said first direction of said first film at an angle of 45° to 90°.
Claim 11
Dependent Claim
115 words
A flexible laminated sheet, comprising: a first uniaxially molecularly-orientated thermoplastic resin film from 20 μm to 70 μm thick orientated in a first direction; a first adhesive layer from 10 μm to 30 μm thick bonded to said first film; a porous sheet from 0.7 mm to 6 mm thick bonded to said first adhesive layer; a second adhesive layer from 10 μm to 30 μm thick bonded to said porous sheet; and a second uniaxially molecularly-orientated thermoplastic film from 20 μm to 70 μm thick bonded to said second adhesive layer in such a manner that its molecularly-orientated direction crosses said first direction of said first film at an angle of 45° to 90°.
Claim 12
Dependent Claim
28 words
A flexible laminated sheet as in claim 7, wherein at least one of the uniaxially molecular-orientated thermoplastic resin film, porous sheet and adhesive layer contains a light-shielding substance.
Claim 13
Dependent Claim
28 words
A flexible laminated sheet as in claim 8, wherein at least one of the uniaxially molecular-orientated thermoplastic resin film, porous sheet and adhesive layer contains a light-shielding substance.
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) | 1987-09-04 | 1988-03-05 | 1988-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-09-04 | 1992-03-05 | 1992-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-09-04 | 1996-03-05 | 1996-09-04 | $7700.00 | Window Closed / Lapsed |