US4294192A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid electrostatic image developing system employs mesh development electrode
Assignee: Sharp Corp
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Filing: 1980-05-28
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Granted: 1981-10-13
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Expires: 2000-05-28
Abstract
Abstract A liquid developing system for developing an electrostatic latent image formed on a copy paper includes a mesh plate development electrode disposed in a traveling path of the copy paper so that the image carrying surface of the copy paper confronts the mesh plate development electrode. A developer liquid supplying roller is provided for supplying the developer liquid to the mesh plate development electrode for forming a swelling developer liquid surface on the mesh plate development electrode. The image carrying surface of the copy paper makes contact with the thus formed swelling developer liquid surface, and the superfluous developer liquid is removed through the mesh plate development electrode.
Inventors
- 👤 Syunzi Nakai
- 👤 Motokazu Nakao
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:51
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/06; G03G15/10; G03G15/101
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
118 words
A liquid development system for developing an electrostatic latent image formed on a copy paper through the use of a developer liquid, said liquid development system comprising in combination: a mesh shaped development electrode disposed in the traveling path of a copy paper above a developer liquid reservoir; a liquid developer supplying means for supplying the developer liquid from said reservoir to said mesh shaped development electrode; and a copy paper feed means for transferring said copy paper above said mesh shaped development electrode in a manner that the front surface of said copy paper, on which said electrostatic latent image is formed, makes contact with or is positioned in close proximity to said mesh shaped development electrode.
Claim 2
Dependent Claim
118 words
A liquid development system for developing an electrostatic latent image formed on a copy paper through the use of a developer liquid, said liquid development system comprising in combination: a mesh shaped development electrode disposed in the traveling path of a copy paper above a developer liquid reservoir; a liquid developer supplying means for supplying the developer liquid from said reservoir to said mesh shaped development electrode; and a copy paper feed means for transferring said copy paper above said mesh shaped development electrode in a manner that the front surface of said copy paper, on which said electrostatic latent image is formed, makes contact with or is positioned in close proximity to said mesh shaped development electrode.
Claim 3
Dependent Claim
36 words
The liquid developer system of claim 1, wherein said mesh shaped developer electrode comprises a mesh metal plate having a width wider than the width of said copy paper, and a length at least 50 mm.
Claim 4
Dependent Claim
72 words
The liquid developing system of claim 2, wherein said developer liquid supplying means comprises a cylinder shaped developer liquid supplying roller transversely disposed in said developer liquid reservoir, the bottom portion of said cylinder shaped developer liquid supplying roller being dipped into the developer liquid contained in said developer liquid reservoir, and the top portion of said cylinder shaped developer liquid supplying roller being positioned close to said mesh shaped developing electrode.
Claim 5
Dependent Claim
37 words
The liquid developer system of claim 3, further comprising: a drying roller disposed at the downstream of the traveling path of said copy paper for removing the excess developer liquid from the underside of said copy paper.
Claim 6
Dependent Claim
66 words
The liquid developer system of claim 1 or 2 wherein said liquid developer supplying means comprises a cylinder shaped developer liquid supplying roller transversely disposed in said developer liquid reservoir, the bottom portion of said cylinder being immersed in the developer liquid contained in said developer liquid reservoir, with the top portion of said cylinder being positioned in close proximity to said mesh shaped development electrode.
Claim 7
Dependent Claim
50 words
The liquid developer system of claim 4, wherein said cylinder shaped developer liquid supply roller is rotatably mounted so as to rotate in the same direction as the traveling copy paper and said drying roller is rotatably mounted so as to rotate in a counter-direction to the traveling copy paper.
Claim 8
Dependent Claim
30 words
The liquid developer system of claim 5, wherein said cylinder shaped developer liquid supplying roller has a longitudinal length slightly shorter than the width of said mesh shaped development electrode.
References Cited (Backward Citations)
US3916827A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-10-12 | 1985-04-13 | 1985-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-10-12 | 1989-04-13 | 1989-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-10-12 | 1993-04-13 | 1993-10-13 | $7700.00 | Window Closed / Lapsed |