Patent UST105201I4 successfully refreshed from Google Patents.
UST105201I4
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US
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Document detector
Assignee: Robert W. Pries
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Filing: 1982-06-14
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Granted: 1985-03-05
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Expires: 2002-06-14
Abstract
Abstract An electrophotographic document copier machine of the transfer type where a detector is positioned subsequent to a detach station to sense whether copy receiving material has been successfully detached from the photoreceptive surface. The detector is comprised of a light source 40 to discharge the photoreceptive material 19 to a repeatable low level and an electrostatic probe 41 to sense that low level. When an unsuccessful detach operation occurs, the probe 41 senses the much higher voltage level present on the back side of copy receiving material which has passed under a transfer corona charge generator prior to reaching the detach station and light source 40.
Inventors
- 👤 Robert W. Pries
- 👤 Henry W. Simpson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:10
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/70; G03G15/706
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-03-04 | 1988-09-03 | 1989-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-03-04 | 1992-09-03 | 1993-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-03-04 | 1996-09-03 | 1997-03-05 | $7700.00 | Window Closed / Lapsed |