US4935787A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Color copier operable both in monochromatic and full-color copying modes
Assignee: Sharp Corp
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Filing: 1988-12-28
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Granted: 1990-06-19
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Expires: 2008-12-28
Abstract
Abstract A color copier operable both in monochromatic and full-color copying modes is controlled by a central processing unit programmed to exercise a real-time control of operation by detecting image characteristics of an original to be copied if a monochromatic copying mode is selected. If a full-color copying mode is selected, the image characteristics are preliminarily detected by scanning before a copying operation is started.
Inventors
- 👤 Yasutaka Maeda
- 👤 Hiromi Washio
- 👤 Tsuyoshi Miyamoto
- 👤 Yukihiko Ueno
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:24
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/50; G03G15/5025; G03G15/01
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
107 words
A color copier operable both in monochromatic and full-color copying modes, said copier comprising real-time control means for detecting image characteristics of an original document and adjusting image quality during a copying process according to said detected image characteristics, preliminary scan control means for preliminarily detecting image characteristics of said original document and adjusting image quality prior to a copying process according to said preliminarily detected image characteristics, and selecting means for selecting said real-time control means if said copier is to be operated in a monochromatic copying mode and said preliminary scan control means if said copier is to be operated in a full-color copying mode.
Claim 2
Dependent Claim
107 words
A color copier operable both in monochromatic and full-color copying modes, said copier comprising real-time control means for detecting image characteristics of an original document and adjusting image quality during a copying process according to said detected image characteristics, preliminary scan control means for preliminarily detecting image characteristics of said original document and adjusting image quality prior to a copying process according to said preliminarily detected image characteristics, and selecting means for selecting said real-time control means if said copier is to be operated in a monochromatic copying mode and said preliminary scan control means if said copier is to be operated in a full-color copying mode.
Claim 3
Dependent Claim
13 words
The copier of claim 1 wherein said selecting means include a control panel.
Claim 4
Dependent Claim
17 words
The copier of claim 1 further comprising color filters for selectively transmitting light of specified colors sequentially.
Claim 5
Dependent Claim
24 words
The copier of claim 1 wherein said real-time control means and said preliminary scan control means are embodied in a single central processing unit.
References Cited (Backward Citations)
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US4239374A
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US4236809A
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US4831415A
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US4723146A
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US4653904A
Cited
US4841335A
Cited
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-06-18 | 1993-12-18 | 1994-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-06-18 | 1997-12-18 | 1998-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-06-18 | 2001-12-18 | 2002-06-19 | $7700.00 | Window Closed / Lapsed |