Patent US4213136A successfully refreshed from Google Patents.
US4213136A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical contact for conductive-backed paper
Assignee: Northrop Grumman Innovation Systems LLC
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Filing: 1978-10-02
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Granted: 1980-07-15
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Expires: 1998-10-02
Abstract
Abstract A particulate, resilient, electrically conductive member having a low thermal mass extends across the width of a conductive-backed recording paper and conducts electrical energy to the conductive backing to heat the paper and develop an image. The member comprises a plurality of closely spaced resilient fingers which extend across the width of the web. A curved crown on each of the fingers protrudes through a slot in a plate over which the paper passes. The ends of the fingers are restrained by the slot so that they are not readily susceptible to damage.
Inventors
- 👤 Leonard E. Jenkins, Jr.
- 👤 Peter R. Lowe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:35
CPC Classifications
G; G01; G01D; G01D15/00; G01D15/14
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
90 words
In a recorder for recording on a conductive-backed web, an apparatus for conducting electrical energy to the conductive backing on said paper comprising in combination; a plate over which said web passes; a slot in said plate; an insulating member disposed beneath said slot; a comb-like structure having a plurality of resilient fingers extending from a common base affixed to said insulating member; said fingers having a compound curve shape with the apex of one curve extending through said slot with the ends of said fingers disposed beneath said slot.
Claim 2
Dependent Claim
90 words
In a recorder for recording on a conductive-backed web, an apparatus for conducting electrical energy to the conductive backing on said paper comprising in combination; a plate over which said web passes; a slot in said plate; an insulating member disposed beneath said slot; a comb-like structure having a plurality of resilient fingers extending from a common base affixed to said insulating member; said fingers having a compound curve shape with the apex of one curve extending through said slot with the ends of said fingers disposed beneath said slot.
Claim 3
Dependent Claim
35 words
In a recorder for recording on a conductive-backed web as set forth in claim 1 wherein said fingers engage the sides of said slot in the absence of an external force applied to said apex.
Claim 4
Dependent Claim
34 words
In a recorder for recording on a conductive-backed web as set forth in claim 1 wherein adjacent fingers are grouped into pairs and join at their tips and at a location intermediate their tips.
References Cited (Backward Citations)
US3995281A
Cited
US4023184A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-07-15 | 1984-01-14 | 1984-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-07-15 | 1988-01-14 | 1988-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-07-15 | 1992-01-14 | 1992-07-15 | $7700.00 | Window Closed / Lapsed |