US4540272A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multicolor printing device
Assignee: Fujitsu Ltd
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Filing: 1983-03-23
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Granted: 1985-09-10
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Expires: 2003-03-23
Abstract
Abstract A multicolor printing device comprising a latent image formation device, which forms an electrostatic latent image selectively corresponding to a plurality of colors on a latent image formation medium, and a plurality of developing devices which develop respectively the colors of the electrostatic latent image, wherein a developable regions are selectively defined in the latent image with regard to the colors of the plurality of developing devices.
Inventors
- 👤 Fumitaka Abe
- 👤 Masatoshi Kimura
- 👤 Toshihiko Watanabe
- 👤 Hiroshi Yamada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:37
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/01; G03G15/0105; G03G15/0126
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
101 words
A multicolor printing device comprising a latent image formation means, which selectively forms an electrostatic latent image on a latent image formation medium, wherein said latent image includes respective portions corresponding to a plurality of colors to be developed, a plurality of developing means for respectively developing said corresponding colors after the formation of said latent image, and means for defining respective developable regions of each developing means in correspondence to said respective portions of said latent image for said corresponding colors to be developed, said means for defining being located between said latent image formation means and said developing means.
Claim 2
Dependent Claim
101 words
A multicolor printing device comprising a latent image formation means, which selectively forms an electrostatic latent image on a latent image formation medium, wherein said latent image includes respective portions corresponding to a plurality of colors to be developed, a plurality of developing means for respectively developing said corresponding colors after the formation of said latent image, and means for defining respective developable regions of each developing means in correspondence to said respective portions of said latent image for said corresponding colors to be developed, said means for defining being located between said latent image formation means and said developing means.
Claim 3
Dependent Claim
39 words
A multicolor printing device according to claim 1, said means for defining said developable regions comprising a respective plate having openings for determining said respective developable regions of said latent image at each of said plurality of developing means.
Claim 4
Dependent Claim
14 words
The device of claim 2, wherein the openings of said plates do not overlap.
Claim 5
Dependent Claim
20 words
The device of claim 2, comprising means for forming and developing a further latent image and further corresponding developing means.
Claim 6
Dependent Claim
44 words
The device of claim 2, said latent image formation means comprising a slit plate and a laser scanning means for scanning a laser beam along a slit in said slit plate for forming said latent image with said respective portions corresponding to said colors.
Claim 7
Dependent Claim
46 words
The device of claim 5, said slit in said slit plate having position inspection marks along one edge of said slit, with spacing between said position inspection marks corresponding to the spacing of said openings of said plates of said means for defining said developable region.
Claim 8
Dependent Claim
24 words
The device of claim 1, said means for defining including a respective component at each said developing means for determining the respective developable region.
References Cited (Backward Citations)
US4106870A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-09-09 | 1989-03-11 | 1989-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-09-09 | 1993-03-11 | 1993-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-09-09 | 1997-03-11 | 1997-09-10 | $7700.00 | Window Closed / Lapsed |