Patent US4064933A successfully refreshed from Google Patents.
US4064933A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Developing roller apparatus for reproduction machines
Assignee: Dietzgen Corp
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Filing: 1975-09-29
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Granted: 1977-12-27
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Expires: 1995-09-29
Abstract
Abstract An improved developing roller for use in the development of heat-sensitive copy sheets in a reproduction machine which comprises a hollow, thin-walled heat conducting rotatable cylinder or drum having a relatively small diameter heat pipe mounted on or embedded in its inner wall and extending substantially between the ends of said cylinder in order to provide and maintain a uniform temperature across the outer surface of said cylinder in use.
Inventors
- 👤 Gordon A. Schuman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:24
CPC Classifications
G; G03; G03D; G03D13/00; G03D13/002; F; F28; F28D; F28D11/00; F28D11/02
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
68 words
A developing roller for use in the development of heat-sensitive copy sheets in a reproduction machine, said roller comprising: a hollow, thin-walled heat conducting cylinder rotatably mounted in the reproduction machine; a plurality of relatively small diameter heat pipes mounted along the inner wall of said cylinder between its ends; and a means for heating said cylinder and heat pipes located within the hollow interior of said cylinder.
Claim 2
Dependent Claim
68 words
A developing roller for use in the development of heat-sensitive copy sheets in a reproduction machine, said roller comprising: a hollow, thin-walled heat conducting cylinder rotatably mounted in the reproduction machine; a plurality of relatively small diameter heat pipes mounted along the inner wall of said cylinder between its ends; and a means for heating said cylinder and heat pipes located within the hollow interior of said cylinder.
Claim 3
Dependent Claim
16 words
The roller of claim 1 wherein said heat pipes are embedded in said inner cylinder wall.
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) | 1980-12-26 | 1981-06-27 | 1981-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-12-26 | 1985-06-27 | 1985-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-12-26 | 1989-06-27 | 1989-12-27 | $7700.00 | Window Closed / Lapsed |