US3758204A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Developing device of the wet developing agent type for electrophotographic duplication
Assignee: Ricoh Co Ltd
•
Filing: 1972-11-28
•
Granted: 1973-09-11
•
Expires: 1992-11-28
Abstract
Abstract A device wherein a coat of a developing agent adhesion preventing material is applied to the surface of an opposed electrode plate disposed in juxtaposed relation to a photosensitive body. A viscous developing liquid of high toner concentration is supplied to a space between the photo-sensitive body and the developing agent adhesion preventing material layer of this opposite electrode plate by a liquid circulating mechanism so as to convert an electrostatic latent image on the photosensitive body into a toner image capable of being transferred to copy sheets.
Inventors
- 👤 N Mochizuki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:36
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/06; G03G15/10; G03G15/101
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
40 words
A developing device as set forth in claim 1 wherein said photosensitive body is a drum formed on its peripheral surface with a photosensitive material layer, and said opposite electrode plate is disposed along the peripheral surface of the drum.
Claim 2
Dependent Claim
25 words
A device as set forth in claim 1 wherein said developing liquid supply means is a nozzle having a flat orifice at its forward end.
Claim 3
Dependent Claim
40 words
A developing device as set forth in claim 1 wherein said developing agent adhesion preventing material is selected from the group consisting of a silicone resin, tetrafluoroethylene, polyurethane, polypropylene, polyethylene, polyester, nylon, vinylidene chloride, vinyl chloride, polycarbonate and cellulose acetate.
Claim 4
Dependent Claim
31 words
A developing device as set forth in claim 1 wherein said coat of said developing agent adhesion preventing material has a thickness in a range from 1 to 100 Mu .
Claim 5
Dependent Claim
114 words
Apparatus for developing an electrotatic latent image, comprising: a. means, including a photosensitive surface moveable along a defined path, for forming an electrostatic latent image on the photosensitive surface; b. an electrode plate for cooperating with said photosensitive surface to develop the latent image by application of a developing agent, said plate having an extended surface disposed in facing, closely spaced relation to the path of movement of said photosensitive surface for defining therewith a space for developing liquid; c. nozzle means for directing a flow of developing liquid containing a developing agent across said extended surface; and d. a thin fixed layer of a developing agent adhesion preventing material, coating said extended surface.
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) | 1976-09-10 | 1977-03-12 | 1977-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-10 | 1981-03-12 | 1981-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-10 | 1985-03-12 | 1985-09-11 | $7700.00 | Window Closed / Lapsed |