Patent US4456944A successfully refreshed from Google Patents.
US4456944A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Table with conductive top
Assignee: Industrial Management Co
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Filing: 1981-07-24
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Granted: 1984-06-26
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Expires: 2001-07-24
Abstract
Abstract A table or platform with an improved conductive top adapted for use particularly with small electronic parts. The table or platform includes a normally horizontal top surface. An improvement in one form of the invention is provided by way of stretching a metal screen or mesh material across the top and then filling the mesh with a layer of resin. The resin is ground or sanded off to expose the mesh to provide the conductive top. The conductive top is grounded. Appropriate grounding means are provided to accommodate the grounding. In a second form of the invention the conductive top is provided by way of embedment of metal particles in a plastic layer so as to make the layer conductive. Preferably the table or platform is fabricated by an improved method embodying the placement of plural layers of resin embedding the wire mesh material, screeding, sanding, and polishing to provide a smooth surface wherein the metal of the mesh is exposed.
Inventors
- 👤 Jack Rooklyn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 23:15
CPC Classifications
H; H05; H05F; H05F3/00; H05F3/02; H05F3/025; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10T; Y10T442/00; Y10T442/10; Y10T442/102; Y10T442/109; Y10T442/131
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
117 words
As an article of manufacture, a platform having an electrically conductive surface comprising in combination, first means having a generally flat, normally horizontal top area, means providing a smooth continuous electrically conductive surface on said area including a layer of plastic material covering the said surface, metallic means embedded in the plastic material so as to provide electrical conductivity, the said plastic layer having a smooth exposed working surface, the metallic means having exposure to the surface to provide for electrical conductivity of static electricity from a part on the surface through the metallic means, and means for grounding the metallic means whereby to quickly drain off static charge from the platform to protect products placed thereon.
Claim 2
Dependent Claim
117 words
As an article of manufacture, a platform having an electrically conductive surface comprising in combination, first means having a generally flat, normally horizontal top area, means providing a smooth continuous electrically conductive surface on said area including a layer of plastic material covering the said surface, metallic means embedded in the plastic material so as to provide electrical conductivity, the said plastic layer having a smooth exposed working surface, the metallic means having exposure to the surface to provide for electrical conductivity of static electricity from a part on the surface through the metallic means, and means for grounding the metallic means whereby to quickly drain off static charge from the platform to protect products placed thereon.
Claim 3
Dependent Claim
33 words
An article as in claim 1 including electrically conductive bracket means having engagement with a part of said plastic layer and metallic means and means providing a grounding connection to said bracket means.
Claim 4
Dependent Claim
38 words
An article as in claim 1 including means forming a frame, at least part of which is electrically conductive positioned around said first means, said plastic layer containing the metallic means having engagement with said electrically conductive frame.
Claim 5
Dependent Claim
31 words
An article as in claim 3 wherein said frame is provided with a continuous groove in its upper surface, an edge portion of said plastic layer being received in said groove.
Claim 6
Dependent Claim
20 words
An article as in claim 4 wherein said metallic means includes metallic wire mesh screen embedded in the plastic layer.
Claim 7
Dependent Claim
30 words
An article as in claim 5 including a retaining means positioned in said continuous groove and retaining edge portions of said plastic layer and metallic means in the said groove.
Claim 8
Dependent Claim
18 words
An article as in claim 1 wherein said metallic means comprisess powdered metal embedded in said plastic layer.
Claim 9
Dependent Claim
48 words
An article as in claim 7 including means forming a frame positioned around said first means having at least a part that is electrically conductive, said plastic layer containing the metallic means having engagement with said electrically conductive part of the frame and means for grounding said part.
Claim 10
Dependent Claim
32 words
An article as in claim 8 wherein said frame has a continuous groove formed in the surface thereof, an edge portion of the said plastic layer being received in the said groove.
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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) | 1987-06-26 | 1987-12-26 | 1988-06-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-06-26 | 1991-12-26 | 1992-06-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-06-26 | 1995-12-26 | 1996-06-26 | $7700.00 | Window Closed / Lapsed |