Patent US4285735A successfully refreshed from Google Patents.
Patent US3885869A successfully refreshed from Google Patents.
US3885869A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrophotographic copying machine
Assignee: Imaging Technology Ltd
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Filing: 1974-04-08
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Granted: 1975-05-27
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Expires: 1994-04-08
Abstract
Abstract The invention relates to an electrophotographic copying machine comprising an exposure station and a development station, in which the charging unit used for charging the electrophotographic substrate material can be operated either stationary over input material as it moves into the exposure station (in an automatic operating mode) or moving over input material stationary in the exposure station (in a manual operating mode).
Inventors
- 👤 Paul Monamy James
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 16:34
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/65; G03G15/6597; G03G15/22; G03G15/26; G03G2215/00; G03G2215/00362; G03G2215/00367; G03G2215/00371; G03G2215/00443; G03G2215/00518; G03G2215/00535; G03G2215/00654; Y; Y10; Y10S; Y10S430/00; Y10S430/001; Y10S430/102
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
112 words
An electrophotographic copying machine comprising a. an exposure station, b. a development station, c. at least one reservoir for electrophotographic substrate material, d. conveying means for supporting the substrate material at the exposure station and for moving the material to the development station, e. a charging unit movable across the exposure station and disposed above the conveying means, f. automatic feed means for drawing material from a reservoir and feeding it to the upstream end of the conveying means, and g. logic circuit means for energising the charging unit either when stationary at said upstream end during passage of material below it or when moving across stationary material in the exposure station.
Claim 2
Dependent Claim
112 words
An electrophotographic copying machine comprising a. an exposure station, b. a development station, c. at least one reservoir for electrophotographic substrate material, d. conveying means for supporting the substrate material at the exposure station and for moving the material to the development station, e. a charging unit movable across the exposure station and disposed above the conveying means, f. automatic feed means for drawing material from a reservoir and feeding it to the upstream end of the conveying means, and g. logic circuit means for energising the charging unit either when stationary at said upstream end during passage of material below it or when moving across stationary material in the exposure station.
Claim 3
Dependent Claim
52 words
A machine as claimed in claim 1, in which said automatic feed means is adjustably positioned in the machine relative to a centre line of said conveying means, the position in said exposure station to which the substrate material is automatically fed being adjustable in a direction transverse to said centre line.
Claim 4
Dependent Claim
54 words
A machine as claimed in claim 1 in which there are a plurality of different reservoirs for sheets of substrate material of different lengths, the duration of movement of the conveying means during feeding of substrate material being controlled on the basis of the selection of reservoir from which the substrate material is drawn.
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) | 1978-05-26 | 1978-11-25 | 1979-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-26 | 1982-11-25 | 1983-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-26 | 1986-11-25 | 1987-05-27 | $7700.00 | Window Closed / Lapsed |