US4540270A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrophotographic copying machine with a pre-copy system
Assignee: Sharp Corp
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Filing: 1984-02-02
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Granted: 1985-09-10
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Expires: 2004-02-02
Abstract
Abstract An electrophotographic copying machine is of the type which starts, in response to the actuation of a copy start switch, its copying operation after a pre-copy process is conducted to stabilize the property of a photoreceptor. The copying machine comprises a selection circuit and a timer. The selection circuit is operated to start the timer upon the termination of a previous copying operation. During a time as set for the timer, the pre-copy process is carried out following the termination of the previous copying operation. In response to the actuation of the copy start switch, the following copying operation is started just following the termination of the previous copying operation.
Inventors
- 👤 Yoshiaki Imanaka
- 👤 Hiroshi Kinashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:32
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/50
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
129 words
An electrophotographic copying machine comprising: initialization means for preparing a photoreceptor for receiving a latent image thereon; copying means responsive to the operation of the initialization means for copying a document; selection means for selecting whether a second document is to be copied following a first document; timer means responsive to said selection means for counting a time of initializing said photoreceptor by said initialization means; and a copy start switch means operated for starting to copy the second document, said copy start switch means to be operated during the full time counted by said timer means whereby said initialization means is responsive to the operation of the selection means for preparing the photoreceptor just following the copying operation of the first document to thereby copy the second document.
Claim 2
Dependent Claim
129 words
An electrophotographic copying machine comprising: initialization means for preparing a photoreceptor for receiving a latent image thereon; copying means responsive to the operation of the initialization means for copying a document; selection means for selecting whether a second document is to be copied following a first document; timer means responsive to said selection means for counting a time of initializing said photoreceptor by said initialization means; and a copy start switch means operated for starting to copy the second document, said copy start switch means to be operated during the full time counted by said timer means whereby said initialization means is responsive to the operation of the selection means for preparing the photoreceptor just following the copying operation of the first document to thereby copy the second document.
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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) | 1988-09-09 | 1989-03-11 | 1989-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-09-09 | 1993-03-11 | 1993-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-09-09 | 1997-03-11 | 1997-09-10 | $7700.00 | Window Closed / Lapsed |