Patent US2742750A successfully refreshed from Google Patents.
US3977779A
Expired / Lapsed
US
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Electrostatographic transfer with air
Assignee: Xerox Corp
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Filing: 1974-09-30
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Granted: 1976-08-31
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Expires: 1994-09-30
Abstract
Abstract An electrostatographic system in which liquid developer material in an image pattern on a photoconductive plate is transferred to a support material by pressing the latter against the plate by air pressure from a perforated chamber adjacent to, but spaced from the plate. The perforations may be angled in the direction of movement of the plate, and the chamber may have an inclined wall.
Inventors
- 👤 Edric R. Brooke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:58
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/14; G03G15/16
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
145 words
Electrostatographic reproduction apparatus including a moving imaging plate, means for producing an electrostatic latent image on said plate, development means for applying liquid developer material to said plate and developing an image of said developer material on said plate of said electrostatic latent image, transfer means for transferring said developer material from said imaging plate to an image support material, and means for feeding image support material to said transfer station, wherein said transfer means comprises non-contacting means for directing air under pressure against said image support material to press said image support material against said plate, and wherein said transfer means comprises an air chamber adapted to receive air under pressure and having a narrow perforated air ejecting wall facing, but spaced from said plate surface and extending thereacross, and wherein said wall has perforations angled in the direction of movement of said plate.
Claim 2
Dependent Claim
145 words
Electrostatographic reproduction apparatus including a moving imaging plate, means for producing an electrostatic latent image on said plate, development means for applying liquid developer material to said plate and developing an image of said developer material on said plate of said electrostatic latent image, transfer means for transferring said developer material from said imaging plate to an image support material, and means for feeding image support material to said transfer station, wherein said transfer means comprises non-contacting means for directing air under pressure against said image support material to press said image support material against said plate, and wherein said transfer means comprises an air chamber adapted to receive air under pressure and having a narrow perforated air ejecting wall facing, but spaced from said plate surface and extending thereacross, and wherein said wall has perforations angled in the direction of movement of said plate.
Claim 3
Dependent Claim
25 words
The apparatus of claim 1, wherein said air chamber has an inclined sheet guide ramp leading up to and transitioning in to said perforated wall.
References Cited (Backward Citations)
US3751156A
Cited
US3847478A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-08-31 | 1980-03-01 | 1980-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-08-31 | 1984-03-01 | 1984-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-08-31 | 1988-03-01 | 1988-08-31 | $7700.00 | Window Closed / Lapsed |