Patent US4586809A successfully refreshed from Google Patents.
US4586809A
Expired / Lapsed
US
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Liquid developing equipment for electrophotographic copying machine
Assignee: Dainippon Screen Manufacturing Co Ltd
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Filing: 1984-05-09
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Granted: 1986-05-06
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Expires: 2004-05-09
Abstract
Abstract A liquid developing equipment for electrophotographic copying machines to carry a photosensitive sheet to the flow of developing solution between tilted and opposing electrode plates, comprising a developing solution storage tank at the upstream of the flow channel and a developing solution discharge outlet positioned facing to the latent image surface of the photosensitive sheet.
Inventors
- 👤 Yoshio Miyauchi
- 👤 Kiyosi Takenaka
- 👤 Yoshihiko Bessho
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 07:13
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/06; G03G15/10; G03G15/108
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
99 words
Apparatus for inclusion in a copying machine for developing an electrostatic latent image present on the format surface of a photosensitive sheet by a liquid toner developing solution flowing along a flow channel between a pair of opposed tilted plates comprising a developing solution storage tank at the upstream end of the flow channel for flowing the developing solution along the back surface of the sheet and a developing solution discharge outlet positioned at the upstream end of the flow channel facing the format surface of the sheet for flowing developing solution along the format surface of said sheet.
Claim 2
Dependent Claim
99 words
Apparatus for inclusion in a copying machine for developing an electrostatic latent image present on the format surface of a photosensitive sheet by a liquid toner developing solution flowing along a flow channel between a pair of opposed tilted plates comprising a developing solution storage tank at the upstream end of the flow channel for flowing the developing solution along the back surface of the sheet and a developing solution discharge outlet positioned at the upstream end of the flow channel facing the format surface of the sheet for flowing developing solution along the format surface of said sheet.
Claim 3
Dependent Claim
37 words
Apparatus as set forth in claim 1 further comprising a developing solution feeder of sufficient capability essentially to fill said flow channel with developing solution supplied from said discharge outlet and also to fill the storage tank.
Claim 4
Dependent Claim
48 words
Apparatus according to claim 1 or 2 in which the capacity of said solution storage tank is sufficient to supply the developing solution used by at least one photosensitive sheet when the solution in the tank flows naturally along the back surface of said sheet to be consumed.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-05-05 | 1989-11-04 | 1990-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-05-05 | 1993-11-04 | 1994-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-05-05 | 1997-11-04 | 1998-05-06 | $7700.00 | Window Closed / Lapsed |