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US5354950A
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Electrostatic shielding sheet for making a box used for shipping and storing electronic components and a shipping box made thereof
Assignee: WOLFGANG WARMBIER SYSTEME GEGEN ELEKTROSTATIK A CORP OF GERMANY Firma
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Filing: 1992-05-18
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Granted: 1994-10-11
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Expires: 2012-05-18
Abstract
Abstract An electrostatic shielding material sheet (10) for making a shipping box (12, 12a) to enclose and protect electronic components and/or assemblies--and the box itself--is characterized by different layers (14, 16, 18, 20) forming an electrostatic shielding material sheet (10), one layer (16) thereof being highly conductive with a surface resistivity of less than 1×10 4 Ohm/sq--preferably 10 2 to 10 3 Ohm/sq--and being allocated to electrostatic dissipative layers (14, 18) with a surface resistivity of between 1×10 5 Ohm/sq and 1×10 12 Ohm/sq. The highly conductive layer (16) is sandwiched between electrostatic dissipative layers (14, 18) or embedded in one of the other layers (14, 18, 20). Additionally, the electrostatic shielding layer (16) shall contain highly conductive fibers.
Inventors
- 👤 Meir Golane
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 04:31
CPC Classifications
H; H05; H05F; H05F1/00; B; B32; B32B; B32B15/00; B32B15/04; B32B15/12; B32B15/14; B32B15/20; B32B29/00; B32B29/02; B32B5/00; B32B5/02; B32B5/022; B32B7/00; B32B7/02; B32B7/025; B32B9/00; B32B9/005; B32B9/007; H05F3/00; H05K; H05K9/00; H05K9/0067; H05K9/0073; H05K9/0079; B32B2307/00; B32B2307/20; B32B2307/202; B32B2307/212; B32B2311/00; B32B2311/02; B32B2311/08; B32B2311/12; B32B2311/30; B32B2313/00; B32B2313/04; B32B2553/00; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12535; Y10T428/12542; Y10T428/12549
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
76 words
An electrostatic shielding sheet material formed of a plurality of layers comprises a first layer of conductive material having a surface resistivity of less than 1×10 4 ohm/sq sandwiched between a second layer material and a third layer material, said second and third layer materials having a surface resistivity of between 1×10 5 to 1×10 12 ohm/sq and said layer of conductive material being made of paper and loaded with 2% to 65% highly conductive fibers.
Claim 2
Dependent Claim
76 words
An electrostatic shielding sheet material formed of a plurality of layers comprises a first layer of conductive material having a surface resistivity of less than 1×10 4 ohm/sq sandwiched between a second layer material and a third layer material, said second and third layer materials having a surface resistivity of between 1×10 5 to 1×10 12 ohm/sq and said layer of conductive material being made of paper and loaded with 2% to 65% highly conductive fibers.
Claim 3
Dependent Claim
27 words
A material sheet according to claim 1 wherein the highly conductive fibers are selected from the group consisting of carbon, Fe, Ag, Cu, Cr and alloys thereof.
Claim 4
Dependent Claim
21 words
A material sheet according to claim 2 wherein the highly conductive fibers have a diameter of not greater than 100 microns.
Claim 5
Dependent Claim
33 words
A material sheet according to claim 1 wherein the highly conductive fibers are selected from the group ;consisting of copper and copper alloys and have a diameter of not greater than 100 microns.
Claim 6
Dependent Claim
30 words
A material sheet according to claim 4 wherein the fibers are made from copper or a copper alloy of a diameter not greater than 20 microns in the shielding layer.
Claim 7
Dependent Claim
30 words
A material sheet according to claim 3 wherein the fibers are made from copper or a copper alloy of a diameter not greater than 20 microns in the shielding layer.
Claim 8
Dependent Claim
27 words
A material sheet according to claim 1 wherein conductive material layer is made of a paper with a loading of 5% to 25% of highly conductive fibers.
Claim 9
Dependent Claim
75 words
A shipping box made of an electrostatic shielding sheet material comprises a first layer of conductive ;material having a surface resistivity of less than 1×10 4 ohm/sq. sandwiched between a second layer material and a third layer material, said second and third layer materials having a surface resistivity of between 1×10 5 to 1×10 12 ohm/sq. and said layer of conductive material being made of paper and loaded with 2% to 65% highly conductive fibers.
Claim 10
Dependent Claim
75 words
A shipping box made of an electrostatic shielding sheet material comprises a first layer of conductive ;material having a surface resistivity of less than 1×10 4 ohm/sq. sandwiched between a second layer material and a third layer material, said second and third layer materials having a surface resistivity of between 1×10 5 to 1×10 12 ohm/sq. and said layer of conductive material being made of paper and loaded with 2% to 65% highly conductive fibers.
Claim 11
Dependent Claim
27 words
A shipping box according to claim 8 wherein the highly conductive fibers are selected from the group consisting of carbon, Fe, Ag, Cu, Cr and alloys thereof.
Claim 12
Dependent Claim
21 words
A shipping box according to claim 9 wherein the highly conductive fibers have a diameter of not greater than 100 microns.
Claim 13
Dependent Claim
30 words
A shipping box according to claim 9 wherein the fibers are made from copper or a copper alloy of a diameter not greater than 20 microns in the shielding layer.
Claim 14
Dependent Claim
33 words
A shipping box according to claim 8 wherein the highly conductive fibers are selected from the group consisting of copper and copper alloys and have a diameter of not greater than 100 microns.
Claim 15
Dependent Claim
30 words
A shipping box according to claim 8 wherein the fibers are made from copper or a copper alloy of a diameter not greater than 20 microns in the shielding layer.
Claim 16
Dependent Claim
27 words
A shipping box according to claim 8 wherein conductive material layer is made of a paper with a loading of 5% to 25% of highly conductive fibers.
References Cited (Backward Citations)
US4553190A
Cited
US5110669A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1997-10-10 | 1998-04-11 | 1998-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-10-10 | 2002-04-11 | 2002-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-10-10 | 2006-04-11 | 2006-10-11 | $7700.00 | Window Closed / Lapsed |