US4866484A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Copier selectively operable in sheet-through mode and sheet-stationary mode
Assignee: Ricoh Co Ltd
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Filing: 1988-09-07
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Granted: 1989-09-12
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Expires: 2008-09-07
Abstract
Abstract A copier having an automatic document feeder and selectively operable in a sheet-through mode and a sheet-stationary mode. The sheet-through mode is automatically selected when only one copy is desired for each of documents while the sheet-stationary mode is automatically selected when two or more copies are desired for each of documents.
Inventors
- 👤 Tatsuya Murai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 16:19
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/50; G03G15/04; G03G15/60; G03G2215/00; G03G2215/00172; G03G2215/00177; G03G2215/00181; G03G2215/00194; G03G2215/00198
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
148 words
In a copier comprising optics disposed below a glass platen the process of exposing a photoconductive element to imagewise light representative of an image which is printed on an original document which is fed to said glass platen, said copier being selectively operable in a sheet-through mode in which a document is moved on and along said glass platen at a predetermined speed relative to said optics which is held in a halt to be scanned by said optics for slit exposure, and a sheet-stationary mode in which said optics is moved at a predetermined speed relative to a document which is held stationary on said glass platen to perform slit exposure, the improvement wherein the sheet-through mode and the sheet-stationary mode are respectively automatically selected when a desired number of copies per document is one and when the number of copies per document is two or greater.
Claim 2
Dependent Claim
148 words
In a copier comprising optics disposed below a glass platen the process of exposing a photoconductive element to imagewise light representative of an image which is printed on an original document which is fed to said glass platen, said copier being selectively operable in a sheet-through mode in which a document is moved on and along said glass platen at a predetermined speed relative to said optics which is held in a halt to be scanned by said optics for slit exposure, and a sheet-stationary mode in which said optics is moved at a predetermined speed relative to a document which is held stationary on said glass platen to perform slit exposure, the improvement wherein the sheet-through mode and the sheet-stationary mode are respectively automatically selected when a desired number of copies per document is one and when the number of copies per document is two or greater.
Claim 3
Dependent Claim
30 words
The copier as claimed in claim 1, wherein one of the sheet-through mode and the sheet-stationary mode is automatically selected when the desired number of copies per document is entered.
Claim 4
Dependent Claim
29 words
The copier as claimed in claim 1, further comprising locking means for locking said optics at a predetermined position below said glass platen when the sheet-through mode is selected.
References Cited (Backward Citations)
US4751550A
Cited
US4771317A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-09-11 | 1993-03-13 | 1993-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-09-11 | 1997-03-13 | 1997-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-09-11 | 2001-03-13 | 2001-09-12 | $7700.00 | Window Closed / Lapsed |