Patent US4954383A successfully refreshed from Google Patents.
US4954383A
Expired / Lapsed
US
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Perforated glue through films
Assignee: Southwall Technologies Inc
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Filing: 1988-07-29
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Granted: 1990-09-04
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Expires: 2008-07-29
Abstract
Abstract Metallized plastic sheet film products improved by being perforated through their surfaces are disclosed. These sheet products can be incorporated into improved strength composites since their perforations permit glue through and prevent delamination and shear previously observed with metallized plastic sheet film products. In addition, the perforations can be used to adjust the conductivity/resistance of the electrically conductive sheet films.
Inventors
- 👤 Robert N. King
- 👤 Gerald R. Behling
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 12:19
CPC Classifications
B; B29; B29D; B29D7/00; B29D7/01; B29C; B29C70/00; B29C70/88; B29C70/882; B29C70/885; B29C2793/00; B29C2793/0045; B29K; B29K2105/00; B29K2105/06; B29K2995/00; B29K2995/0003; B29K2995/0005; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1052; Y10T156/1054; Y10T156/1056; Y10T156/1057; Y10T428/00; Y10T428/24; Y10T428/24273; Y10T428/24281; Y10T428/24298; Y10T428/24314; Y10T428/24322; Y10T428/24777; Y10T428/24802; Y10T428/24826; Y10T428/24917; Y10T428/24942; Y10T428/2495; Y10T428/24967; Y10T428/24975; Y10T428/26; Y10T428/263; Y10T428/264; Y10T428/265; Y10T428/266; Y10T428/31; Y10T428/31504; Y10T428/31507; Y10T428/31511; Y10T428/31529; Y10T428/31533; Y10T428/31678; Y10T428/31681; Y10T428/31692; Y10T428/31699
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
121 words
In a plastic sheet product comprising a 0.25 to 20 mil thick metallizable plastic sheet substrate having deposited on one or both of its sides a coating comprising an electrically conductive metal layer, said metal layer being from 5 nm to 500 nm in thickness, the improvement comprising a plurality of perforations through said plastic sheet and said coating, said perforations being selected from a plurality of slits, said slits being not greater than 2 cm in length and spaced not more than 1 cm from one another and from a plurality of holes said holes being of a size and density such that the holes constitute from about 1% to about 90% of the surface area of said plastic sheet.
Claim 2
Dependent Claim
121 words
In a plastic sheet product comprising a 0.25 to 20 mil thick metallizable plastic sheet substrate having deposited on one or both of its sides a coating comprising an electrically conductive metal layer, said metal layer being from 5 nm to 500 nm in thickness, the improvement comprising a plurality of perforations through said plastic sheet and said coating, said perforations being selected from a plurality of slits, said slits being not greater than 2 cm in length and spaced not more than 1 cm from one another and from a plurality of holes said holes being of a size and density such that the holes constitute from about 1% to about 90% of the surface area of said plastic sheet.
Claim 3
Dependent Claim
12 words
The plastic sheet product of claim 1 wherein said perforations are slits.
Claim 4
Dependent Claim
12 words
The plastic sheet product of claim 1 wherein said perforation are holes.
Claim 5
Dependent Claim
15 words
The plastic sheet product of claim 1 wherein the electrically conductive metal layer is sputter-deposited.
Claim 6
Dependent Claim
28 words
The plastic sheet product of claim 1 wherein said plastic substrate comprises a plastic selected from the group consisting of polyester, polyimide, polysulfone, polyamide, polyacrylic, polycarbonate, and polyetherimide.
Claim 7
Dependent Claim
31 words
A composite structure comprising the plastic sheet product of claim 1 embedded in a cured polymer resin matrix with said matrix being continuous through the perforations in said plastic sheet product.
Claim 8
Dependent Claim
15 words
The composite structure of claim 6 wherein said metal layer is a sputter-deposited metal layer.
Claim 9
Dependent Claim
27 words
The composite structure of claim 6 wherein said plastic substrate comprises a plastic selected from the group consisting of polyester, polyimide, polysulfone, polyacrylic, polycarbonate, polyetherimide, and polyamide.
Claim 10
Dependent Claim
11 words
The composite structure of claim 8 wherein said perforations are holes.
Claim 11
Dependent Claim
11 words
The composite structure of claim 8 wherein said perforations are slits.
Claim 12
Dependent Claim
16 words
The composite structure of claim 6 wherein said cured polymer matrix is a cured epoxy matrix.
Claim 13
Dependent Claim
16 words
The composite structure of claim 6 wherein said cured polymer matrix is a cured imide matrix.
Claim 14
Dependent Claim
33 words
A structural composite material comprising reinforcing fibers and a plastic sheet product of claim 1 embedded in a cured polymer matrix, said matrix being continuous through the perforations in said plastic sheet product.
Claim 15
Independent Claim
147 words
A method for upwardly adjusting sheet resistance of a 0.25 to 20 mil thick plastic sheet product including a metallizable plastic substrate having deposited on one or both of its sides a coating comprising an electrically conductive sputter-deposited metal layer said metal layer being from 5 nm to 500 nm in thickness, the method comprising making a controlled plurality of perforations through said plastic substrate and said coating in these regions of the product in which it is desired to upwardly adjust the sheet resistance, said perforations being selected from a plurality of slits, said slits being not greater than 2 cm in length and spaced not more than 1 cm from one another and from a plurality of holes said holes being of a size and density such that the holes constitute from about 1% to about 90% of the surface area of said plastic sheet.
Claim 16
Independent Claim
147 words
A method for upwardly adjusting sheet resistance of a 0.25 to 20 mil thick plastic sheet product including a metallizable plastic substrate having deposited on one or both of its sides a coating comprising an electrically conductive sputter-deposited metal layer said metal layer being from 5 nm to 500 nm in thickness, the method comprising making a controlled plurality of perforations through said plastic substrate and said coating in these regions of the product in which it is desired to upwardly adjust the sheet resistance, said perforations being selected from a plurality of slits, said slits being not greater than 2 cm in length and spaced not more than 1 cm from one another and from a plurality of holes said holes being of a size and density such that the holes constitute from about 1% to about 90% of the surface area of said plastic sheet.
References Cited (Backward Citations)
GB1355036A
Cited
US4099765A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-09-03 | 1994-03-05 | 1994-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-09-03 | 1998-03-05 | 1998-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-09-03 | 2002-03-05 | 2002-09-04 | $7700.00 | Window Closed / Lapsed |