Patent US4734735A successfully refreshed from Google Patents.
US4734735A
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Image apparatus having a color separation function
Assignee: Konica Minolta Inc
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Filing: 1986-08-18
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Granted: 1988-03-29
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Expires: 2006-08-18
Abstract
Abstract An image forming apparatus wherein an image exposure device, a whole surface exposure device by light of specific colors and a developing device, are disposed facing a photosensitive member having a surface insulating layer and provided with a color separation function in its surface. In the developing device, the operating condition is changed according to image forming modes. By the combination of the whole surface exposure and development, from an original image in specific colors a visible image in other colors can be provided.
Inventors
- 👤 Satoshi Haneda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:30
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/056; G03G15/01
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
66 words
An image forming apparatus comprising image exposure means, whole surface exposure means by light of specific colors, and developing means, wherein each of said means is disposed opposite to a photosensitive member having a surface insulating layer and having a color separation function, and wherein a particular color in an original image is converted into another color by combination of said whole surface exposure and development.
Claim 2
Dependent Claim
66 words
An image forming apparatus comprising image exposure means, whole surface exposure means by light of specific colors, and developing means, wherein each of said means is disposed opposite to a photosensitive member having a surface insulating layer and having a color separation function, and wherein a particular color in an original image is converted into another color by combination of said whole surface exposure and development.
Claim 3
Dependent Claim
38 words
The image forming apparatus according to claim 1, wherein the difference between developing potential contrasts at portions on said photosensitive member corresponding to color components provided by color separation is within 30% of the maximum developing potential contrast.
Claim 4
Dependent Claim
38 words
The image forming apparatus according to claim 1, wherein the difference between developing potential contrasts at portions on said photosensitive member corresponding to color components provided by color separation is within 15% of the maximum developing potential contrast.
Claim 5
Dependent Claim
24 words
The image forming apparatus according to claim 1, wherein the operating condition of said developing means can be changed according to image forming modes.
Claim 6
Dependent Claim
20 words
The image forming apparatus according to claim 4, wherein said operating condition is a duty ratio of a developing bias.
Claim 7
Dependent Claim
24 words
The image forming apparatus of claim 4 wherein said operating condition is based on a voltage of a d.c. component of a developing bias.
Claim 8
Dependent Claim
24 words
The image forming apparatus of claim 4 wherein said operating condition is based on a voltage of an a.c. component of a developing bias.
Claim 9
Dependent Claim
24 words
The image forming apparatus of claim 4 wherein said operating condition is based on a frequency of an a.c. component of a developing bias.
References Cited (Backward Citations)
US4515462A
Cited
US4619518A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-03-29 | 1991-09-28 | 1992-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-03-29 | 1995-09-28 | 1996-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-03-29 | 1999-09-28 | 2000-03-29 | $7700.00 | Window Closed / Lapsed |