Patent US4738882A successfully refreshed from Google Patents.
US4738882A
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Static shielding sheet materials and bags formed therefrom
Assignee: Amcor Flexibles North America Inc
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Filing: 1986-09-08
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Granted: 1988-04-19
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Expires: 2006-09-08
Abstract
Abstract An antistatic laminated sheet material suitable for making receptacles for the protection of electronic components from electrostatic charges. The material comprises an insulating layer having a high tensile modulus, a metal layer of surface resistivity not exceeding about 104 ohms/square and a conductive ink layer, said ink layer being dry and being sufficiently flexible to adapt to folds in the material. Bags formed of the material are also disclosed.
Inventors
- 👤 Robert A. Rayford
- 👤 James W. Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:17
CPC Classifications
B; B32; B32B; B32B15/00; B32B15/04; B32B15/08; B32B15/09; B32B15/20; B32B27/00; B32B27/30; B32B27/306; B32B7/00; B32B7/04; B32B7/12; H; H05; H05F; H05F1/00; H05F1/02; B32B2307/00; B32B2307/20; B32B2307/206; B32B2307/21; B32B2307/40; B32B2307/412; B32B2307/50; B32B2307/54; B32B2311/00; B32B2311/24; B32B2331/00; B32B2331/04; B32B2367/00; B32B2439/00; B32B2439/40; B32B2439/46; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10T; Y10T428/00; Y10T428/13; Y10T428/1334; Y10T428/1338; Y10T428/24; Y10T428/24942; Y10T428/24992; Y10T428/28; Y10T428/2813; Y10T428/2817; Y10T428/2826; Y10T428/31504; Y10T428/31678
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
57 words
A static shielding laminated sheet material suitable for making receptacles for protecting electronic components from electrostatic charges, the material comprising an electrically insulating layer, a metal layer of surface resistivity not exceeding about 10 4 ohms/square and a conductive ink layer, said ink layer being dry and being sufficiently flexible to adapt to folds in said material.
Claim 2
Dependent Claim
57 words
A static shielding laminated sheet material suitable for making receptacles for protecting electronic components from electrostatic charges, the material comprising an electrically insulating layer, a metal layer of surface resistivity not exceeding about 10 4 ohms/square and a conductive ink layer, said ink layer being dry and being sufficiently flexible to adapt to folds in said material.
Claim 3
Dependent Claim
13 words
A material as set forth in claim 1 further comprising a sealant layer.
Claim 4
Dependent Claim
18 words
A material as set forth in claim 2 wherein the sealant layer forms a surface of the material.
Claim 5
Dependent Claim
26 words
A material as set forth in claim 1 wherein the electrically insulating layer has a high tensile modulus and a volume resistivity exceeding 10 10 ohm-centimeters.
Claim 6
Dependent Claim
28 words
A material as set forth in claim 1 wherein the material is sufficiently transparent to allow visual identification of electronic components when they are viewed through the material.
Claim 7
Dependent Claim
25 words
A material as set forth in claim 5 wherein the metal layer comprises an aluminum layer having a light transmission index of at least 40%.
Claim 8
Dependent Claim
22 words
A material as set forth in claim 1 wherein the conductive ink layer is printed in the form of a grid pattern.
Claim 9
Dependent Claim
55 words
A material as set forth in claim 1 which is sufficiently transparent to allow visual identification of the components when viewed through the material, wherein the electrically insulating layer has a high tensile modulus and a volume resistivity exceeding 10 10 ohm-centimeters, and further comprising a sealant layer which forms a surface of the material.
Claim 10
Dependent Claim
58 words
A static shielding bag of laminated sheet material for protecting electronic components within the bag from electrostatic charges, the material comprising an electrically insulating layer, a metal layer of surface resistivity not exceeding about 10 4 ohms/square and a conductive ink layer, said ink layer being dry and being sufficiently flexible to adapt to folds in said material.
Claim 11
Dependent Claim
58 words
A static shielding bag of laminated sheet material for protecting electronic components within the bag from electrostatic charges, the material comprising an electrically insulating layer, a metal layer of surface resistivity not exceeding about 10 4 ohms/square and a conductive ink layer, said ink layer being dry and being sufficiently flexible to adapt to folds in said material.
Claim 12
Dependent Claim
24 words
A bag as set forth in claim 9 wherein the bag is sufficiently transparent to allow visual identification of the components within the bag.
Claim 13
Dependent Claim
25 words
A bag as set forth in claim 10 wherein the metal layer comprises an aluminum layer having a light transmission index of at least 40%.
Claim 14
Dependent Claim
26 words
A bag as set forth in claim 9 wherein the electrically insulating layer has a high tensile modulus and a volume resistivity exceeding 10 10 ohm-centmeters.
Claim 15
Dependent Claim
22 words
A bag as set forth in claim 9 wherein the conductive ink layer is printed in a grid pattern on another layer.
Claim 16
Dependent Claim
20 words
A bag as set forth in claim 9 wherein the material further comprises an adhesive layer and a sealant layer.
Claim 17
Dependent Claim
25 words
A bag as set forth in claim 9 wherein the sealant layer forms an inside surface of the material toward the inside of the bag.
Claim 18
Dependent Claim
27 words
A bag as set forth in claim 15 wherein the conductive ink layer and an adhesive layer are located between the sealant layer and the metal layer.
Claim 19
Dependent Claim
27 words
A bag as set forth in claim 15 wherein the metal layer and an adhesive layer are located between the sealant layer and the conductive ink layer.
Claim 20
Dependent Claim
52 words
A bag as set forth in claim 9 wherein the bag is formed from a single sheet of the material folded over on itself, the bag thereby having two sides, conductivity being maintained across the fold by one or the other or both of the metal layer and the conductive ink layer.
Claim 21
Dependent Claim
20 words
A bag as set forth in claim 9 wherein the metal layer is in contact with the conductive ink layer.
Claim 22
Dependent Claim
22 words
A bag as set forth in claim 9 further comprising an adhesive layer separating the metal layer from the conductive ink layer.
Claim 23
Dependent Claim
22 words
A bag as set forth in claim 9 wherein the electrically insulating layer separates the metal layer from the conductive ink layer.
References Cited (Backward Citations)
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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) | 1991-04-19 | 1991-10-19 | 1992-04-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-04-19 | 1995-10-19 | 1996-04-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-04-19 | 1999-10-19 | 2000-04-19 | $7700.00 | Window Closed / Lapsed |