Patent US4860054A successfully refreshed from Google Patents.
US4860054A
Expired / Lapsed
US
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Copier control system
Assignee: Ricoh Co Ltd
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Filing: 1988-02-26
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Granted: 1989-08-22
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Expires: 2008-02-26
Abstract
Abstract A control system for an electrophotographic copier of the type using a photoconductive element having a seam varies the position for starting counting timing pulses, which are adapted to control the operations of various units or electrical loads of the copier, in dependence upon the copy mode. The control system reduces the period of time necessary for the first copy to be produced by the copier.
Inventors
- 👤 Masami Higuchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 14:22
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/50; G03G21/00; G03G21/14; G03G21/145
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
107 words
A system for controlling a copier having independent units which constitute a plurality of electrical loads for forming an image on a photoconductive element and recording said image on a paper sheet, comprising: pulse generating means for generating timing pulses; counting means for counting said timing pulses; and control means for controlling operations of said electrical loads on the basis of the number of timing pulses counted by said counting means; said counting means starting counting said timing pulses at any of a plurality of points, said control means selecting one of said plurality of points for starting counting said timing pulses depending upon a copy mode.
Claim 2
Independent Claim
107 words
A system for controlling a copier having independent units which constitute a plurality of electrical loads for forming an image on a photoconductive element and recording said image on a paper sheet, comprising: pulse generating means for generating timing pulses; counting means for counting said timing pulses; and control means for controlling operations of said electrical loads on the basis of the number of timing pulses counted by said counting means; said counting means starting counting said timing pulses at any of a plurality of points, said control means selecting one of said plurality of points for starting counting said timing pulses depending upon a copy mode.
Claim 3
Dependent Claim
18 words
A system as claimed in claim 1, wherein said photoconductive element comprises a photoconductive belt having a seam.
Claim 4
Dependent Claim
18 words
A system as claimed in claim 1, wherein said photoconductive element comprises a photoconductive drum having a seam.
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) | 1992-08-21 | 1993-02-20 | 1993-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-08-21 | 1997-02-20 | 1997-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-08-21 | 2001-02-20 | 2001-08-22 | $7700.00 | Window Closed / Lapsed |