US3976374A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Elimination of redundant image
Assignee: Xerox Ltd
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Filing: 1975-03-11
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Granted: 1976-08-24
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Expires: 1995-03-11
Abstract
Abstract A copying machine comprises an electrostatographic surface, means to set the selected number of copies to be made by the apparatus, means to drive the surface a plurality of times successively from a charging station through an exposure station to a developing station, and means to render at least one of said stations inoperative for a period at the start of the copying run in order to allow all parts of the apparatus to reach operative condition.
Inventors
- 👤 Robert George Hickman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 04:33
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/22; G03G15/28; G03G15/30
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
121 words
A copying machine comprising: means to set the selected number of copies to be made by the apparatus, means to drive an electrostatographic surface a plurality of times successively from a charging station through an exposure station to a developing station, means to render at least one of said stations inoperative for a period at the start of the copying run in order to allow all parts of the apparatus to reach operative conditions, a plurality of microswitches, and means to actuate each microswitch in turn during each copying cycle of the machine, said means to render one of said stations inoperative including one of said microswitches, said period ending when said one microswitch is first actuated during a copying run.
Claim 2
Dependent Claim
121 words
A copying machine comprising: means to set the selected number of copies to be made by the apparatus, means to drive an electrostatographic surface a plurality of times successively from a charging station through an exposure station to a developing station, means to render at least one of said stations inoperative for a period at the start of the copying run in order to allow all parts of the apparatus to reach operative conditions, a plurality of microswitches, and means to actuate each microswitch in turn during each copying cycle of the machine, said means to render one of said stations inoperative including one of said microswitches, said period ending when said one microswitch is first actuated during a copying run.
Claim 3
Dependent Claim
35 words
A copying machine as claimed in claim 1 whose exposure station comprises an exposure lamp, the means for rendering one of said stations inoperative being connected to prevent energization of said lamp for said period.
Claim 4
Dependent Claim
36 words
A copying machine as claimed in claim 1 wherein said one microswitch is arranged relative to the microswitch actuating means so that it is actuated nearly one copying cycle after the start of the copying run.
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) | 1979-08-24 | 1980-02-23 | 1980-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-08-24 | 1984-02-23 | 1984-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-08-24 | 1988-02-23 | 1988-08-24 | $7700.00 | Window Closed / Lapsed |