Patent US3711796A successfully refreshed from Google Patents.
US3711796A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrophotographic copying machine
Assignee: Canon Inc
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Filing: 1971-07-28
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Granted: 1973-01-16
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Expires: 1991-07-28
Abstract
Abstract An electrophotographic copying machine of the type using a drum type photosensitive medium provided with a cleaning system. The cleaning system includes a blade of resilient material oriented in a counter-direction relative to the direction of movement of the photosensitive medium and having one edge disposed in contact with the medium, a cleaning tank, and circuitry for applying cleaning liquid to the areas of the medium and the blade near the contact area therebetween before the process is started.
Inventors
- 👤 T Saito
- 👤 Y Ando
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 01:22
CPC Classifications
G; G03; G03G; G03G21/00; G03G21/0088; G03G15/00; G03G15/22; G03G15/28; G03G15/30
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
84 words
An electrophotographic copying machine including a photosensitive medium, electrostatic latent image formation means, liquid type developing means, transfer means and cleaning means, said photosensitive medium having developing liquid collection grooves formed at the opposite end portions thereof, said cleaning means comprising a blade of resilient material having one edge disposed in contact with said medium, a cleaning liquid tank, and means for applying cleaning liquid to the areas of said medium and said blade near the contact area therebetween before cleaning action is started.
Claim 2
Dependent Claim
84 words
An electrophotographic copying machine including a photosensitive medium, electrostatic latent image formation means, liquid type developing means, transfer means and cleaning means, said photosensitive medium having developing liquid collection grooves formed at the opposite end portions thereof, said cleaning means comprising a blade of resilient material having one edge disposed in contact with said medium, a cleaning liquid tank, and means for applying cleaning liquid to the areas of said medium and said blade near the contact area therebetween before cleaning action is started.
Claim 3
Dependent Claim
33 words
An electrophotographic copying machine as defined in claim 1, wherein said cleaning means further comprises liquid delivery means for delivering cleaning liquid from said cleaning liquid tank to said cleaning liquid application means.
Claim 4
Dependent Claim
43 words
An electrophotographic copying machine as defined in claim 2, wherein liquid in said cleaning liquid tank is developing liquid, and said liquid delivery means delivers developing liquid from said tank to said cleaning liquid application means and to said liquid type developing means.
Claim 5
Dependent Claim
55 words
An electrophotographic copying machine as defined in claim 3, wherein said liquid delivery means includes distributor means for distributing the developing liquid from said cleaning liquid tank to said cleaning liquid application means before cleaning action is started, and for distributing the developing liquid from said tank to said developing means during the cleaning action.
Claim 6
Dependent Claim
71 words
An electrophotographing copying machine as defined in claim 1, wherein said cleaning liquid application means includes a developing liquid conduit disposed adjacent to one end of said blade in such a manner that tHe open end portion of said conduit is somewhat inclined downwardly, and a cleaning liquid blocking plate provided at the other end of said blade in corresponding relationship with one of said grooves formed on said photosensitive medium.
Claim 7
Dependent Claim
28 words
An electrophotographic copying machine as defined in claim 1, wherein said blade is oriented in a counter-direction with respect to the direction of movement of said photosensitive medium.
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) | 1976-01-16 | 1976-07-17 | 1977-01-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-16 | 1980-07-17 | 1981-01-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-16 | 1984-07-17 | 1985-01-16 | $7700.00 | Window Closed / Lapsed |