US4204731A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for electrophotographic copying with means for effecting image penetration through the copy carriers
Assignee: Agfa Gevaert AG
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Filing: 1978-02-03
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Granted: 1980-05-27
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Expires: 1998-02-03
Abstract
Abstract An electrostatic charge is applied to a charge carrier and the latter is thereupon contacted with one side of a sheet-material copy carrier. Thereafter, an original is imaged onto the charge carrier to produce thereon a latent electrostatic image field which penetrates the copy carrier, whereupon the latent image is developed on the copy carrier by contacting the other side thereof with developer material.
Inventors
- 👤 Robert Kohler
- 👤 Jorn Muller
- 👤 Dieter Giglberger
- 👤 Freidrich Bestenreiner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 09:40
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/22; G03G15/24; G03G15/226; G03G15/227
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
121 words
In an electrophotographic copying apparatus, a combination comprising a charge carrier plate of transparent material having an electrostatically chargeable surface; means for applying to said surface one side of a flexible sheet-material copy carrier; means for forming a latent electrostatic image of an original on said surface upon application of the copy carrier to the surface, so that the latent electrostatic image penetrates the copy carrier; means for developing the latent image on an opposite side of the copy carrier to produce an actual visible image on said opposite side; a carriage movable along said surface and carrying said means for developing; and a corona charging device also carried by said carriage for applying a uniform electrostatic charge to said surface.
Claim 2
Dependent Claim
121 words
In an electrophotographic copying apparatus, a combination comprising a charge carrier plate of transparent material having an electrostatically chargeable surface; means for applying to said surface one side of a flexible sheet-material copy carrier; means for forming a latent electrostatic image of an original on said surface upon application of the copy carrier to the surface, so that the latent electrostatic image penetrates the copy carrier; means for developing the latent image on an opposite side of the copy carrier to produce an actual visible image on said opposite side; a carriage movable along said surface and carrying said means for developing; and a corona charging device also carried by said carriage for applying a uniform electrostatic charge to said surface.
Claim 3
Dependent Claim
24 words
A combination as defined in claim 1, said means for applying including biasing means for biasing increments of said copy carrier against said surface.
Claim 4
Dependent Claim
32 words
A combination as defined in claim 1, said means for forming comprising an X-ray source adjacent to but spaced from another surface of said plate which faces away from said chargeable surface.
Claim 5
Dependent Claim
20 words
A combination as defined in claim 3, wherein said other surface of said plate constitutes a support for the original.
Claim 6
Dependent Claim
24 words
A combination as defined in claim 1, wherein said means for developing comprises a device for contacting said copy carrier with a liquid developer.
Claim 7
Dependent Claim
30 words
A combination as defined in claim 1, wherein said means for developing comprises a device for applying to said opposite side of said copy carrier a stream of developing fluid.
Claim 8
Dependent Claim
28 words
A combination as defined in claim 1, wherein said means for developing comprises a device for contacting said opposite side of said copy carrier with a developing liquid.
Claim 9
Dependent Claim
28 words
A combination as defined in claim 7; and further comprising means for drying said opposite side of said copy carrier subsequent to contacting thereof with the developing liquid.
References Cited (Backward Citations)
US2968553A
Cited
US3697160A
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US3654654A
Cited
US3722992A
Cited
US3820985A
Cited
US3924945A
Cited
US4039344A
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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) | 1983-05-27 | 1983-11-26 | 1984-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-05-27 | 1987-11-26 | 1988-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-05-27 | 1991-11-26 | 1992-05-27 | $7700.00 | Window Closed / Lapsed |