US4579445A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Copier having uniform sheet size mode
Assignee: Ricoh Co Ltd
•
Filing: 1984-02-06
•
Granted: 1986-04-01
•
Expires: 2004-02-06
Abstract
Abstract A control device for a copier varies a magnification such that images on different sizes of documents are accommodated in a single predetermined size of copy sheets. The control device includes a read only memory for storing magnification data which are optimum for various combinations of a document size, a copy sheet size and a document orientation, a proper magnification check flag indicative of whether a selected magnification is proper and a document orientation check flag indicative of whether a selected orientation of a document is proper.
Inventors
- 👤 Yutaka Hasegawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:47
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/50; G03G15/5095; G03G15/04; G03G15/041
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
180 words
A control device for a copier which is operable in a uniform sheet size mode to copy pictures on documents having different sizes in copy sheets having a predetermined single size by varying a magnification by means of a magnification mechanism of an optical system, said control device comprising: copy sheet size detector means for detecting a size of copy sheets; document size detector means for detecting a size of a document; store means for storing magnification data which are optimum for various combinations of a size of a document, a size of copy sheets and an orientation of a document; and control means for causing the magnification mechanism to set a magnification and controlling a predetermined copying process in response to a copy sheet size detected by the copy sheet size detector means and a document size detected by the document size detector means; the store means being constructed to store a proper magnification check flag indicative of whether the magnification is proper and a document orientation check flag indicative of whether an orientation of a document is proper.
Claim 2
Dependent Claim
180 words
A control device for a copier which is operable in a uniform sheet size mode to copy pictures on documents having different sizes in copy sheets having a predetermined single size by varying a magnification by means of a magnification mechanism of an optical system, said control device comprising: copy sheet size detector means for detecting a size of copy sheets; document size detector means for detecting a size of a document; store means for storing magnification data which are optimum for various combinations of a size of a document, a size of copy sheets and an orientation of a document; and control means for causing the magnification mechanism to set a magnification and controlling a predetermined copying process in response to a copy sheet size detected by the copy sheet size detector means and a document size detected by the document size detector means; the store means being constructed to store a proper magnification check flag indicative of whether the magnification is proper and a document orientation check flag indicative of whether an orientation of a document is proper.
Claim 3
Dependent Claim
47 words
A control device as claimed in claim 1, in which the copy sheet size detector means comprises a plurality of photocouplers, and lugs which are arranged on a sheet cassette for storing copy sheets of a predetermined size in a predetermined number and at a predetermined spacing.
Claim 4
Dependent Claim
39 words
A control device as claimed in claim 1, in which the document size detector means comprises a plurality of reflection type photosensors arranged in predetermined locations on a presser plate which presses a document against an optical scanning surface.
Claim 5
Dependent Claim
41 words
A control device as claimed in claim 1, in which the magnification data are predetermined to be values which allow at least a whole surface picture of a document to be fully accommodated in a copy sheet of the predetermined size.
Claim 6
Dependent Claim
37 words
A control device as claimed in claim 1, further comprising copy sheet display means for commanding confirmation of a size of a copy sheet in response to the proper magnification check flag read from the store means.
Claim 7
Dependent Claim
37 words
A control device as claimed in claim 1, further comprising document orientation display means for commanding confirmation of an orientation of a document in response to the proper document orientation check flag read from the store means.
Claim 8
Dependent Claim
18 words
A control device as claimed in claim 1, in which the store means comprises a read only memory.
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) | 1989-03-31 | 1989-09-30 | 1990-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-03-31 | 1993-09-30 | 1994-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-03-31 | 1997-09-30 | 1998-04-01 | $7700.00 | Window Closed / Lapsed |