US3695757A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Xerographic plate
Assignee: Xerox Corp
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Filing: 1970-02-13
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Granted: 1972-10-03
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Expires: 1990-02-13
Abstract
Abstract A xerographic plate including a mandrel and a photoconductive sleeve mounted thereon. The mandrel has an inflatable tube mounted in a groove for securing the sleeve to the mandrel.
Inventors
- 👤 Paul M Gregory
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:05
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/75; G03G15/751; B; B65; B65D; B65D39/00; B65D39/08; G03G5/00; G03G5/10
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
187 words
A xerographic drum suitable for use in an automatic xerographic reproducing apparatus including a flexible cylindrical sleeve formed of an electrically conductive substrate having a layer of photoconductive material placed thereover, a support mandrel having an outside diameter that is slightly leSs than the inside diameter of the flexible cylinder whereby said support mandrel is capable of supporting said cylinder in free sliding relationship thereon, the outer surface of said mandrel having a continuous generally circumferentially extending helical groove formed therein, a single inflatable member positioned within said groove, said member being substantially enclosed within said groove with the outer periphery of said member being below the outer surface of said mandrel when said member is in a non-inflated condition to allow said flexible cylindrical sleeve to freely move said mandrel, means to inflate said inflatable member to expand said member into contact against the sidewalls of the groove and to expand a portion of said inflatable member beyond the outer diameter of said mandrel into holding contact against said sleeve, and a flexible conductive member for electrically connecting the substrate of said sleeve to said mandrel.
Claim 2
Dependent Claim
187 words
A xerographic drum suitable for use in an automatic xerographic reproducing apparatus including a flexible cylindrical sleeve formed of an electrically conductive substrate having a layer of photoconductive material placed thereover, a support mandrel having an outside diameter that is slightly leSs than the inside diameter of the flexible cylinder whereby said support mandrel is capable of supporting said cylinder in free sliding relationship thereon, the outer surface of said mandrel having a continuous generally circumferentially extending helical groove formed therein, a single inflatable member positioned within said groove, said member being substantially enclosed within said groove with the outer periphery of said member being below the outer surface of said mandrel when said member is in a non-inflated condition to allow said flexible cylindrical sleeve to freely move said mandrel, means to inflate said inflatable member to expand said member into contact against the sidewalls of the groove and to expand a portion of said inflatable member beyond the outer diameter of said mandrel into holding contact against said sleeve, and a flexible conductive member for electrically connecting the substrate of said sleeve to said mandrel.
Claim 3
Dependent Claim
23 words
The apparatus of claim 1 wherein said helical groove is generally semi-circular in cross section and said inflatable member comprises a flexible tube.
Claim 4
Dependent Claim
45 words
The apparatus of claim 1 wherein said groove is rectangular in cross section and said inflatable member is rectangular in cross section and the wall of said tube adjacent the peripheral surface of said mandrel is thinner than the remaining walls of said flexible member.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-10-03 | 1976-04-03 | 1976-10-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-03 | 1980-04-03 | 1980-10-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-03 | 1984-04-03 | 1984-10-03 | $7700.00 | Window Closed / Lapsed |