US4076403A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrographic process
Assignee: Olympus Corp
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Filing: 1976-12-06
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Granted: 1978-02-28
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Expires: 1996-12-06
Abstract
Abstract An electrographic process of producing, on a dielectric coated image receiving body, an electrostatic charge image corresponding to an image to be recorded is disclosed. The process comprises making a radius of curvature of a screen-shaped photosensitive body different from that of the dielectric coated image receiving body, arranging these two bodies in opposed and spaced apart relation and driving these two bodies at surface speeds which are different from each other.
Inventors
- 👤 Masaji Nishikawa
- 👤 Eiichi Sato
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 04:12
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/05; G03G15/051
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
158 words
An electrographic process comprising using a screen-shaped photosensitive body composed of at least one electric conductive layer and photoconductive layer, uniformly charging said photoconductive layer, illuminating said screen-shaped photosensitive body with a light image corresponding to a picture image of a manuscript to be recorded so as to form an electrostatic latent image on said photoconductive layer, directing a flow of corona ions through said screen-shaped photosensitive body toward a dielectric coated image receiving body and controlling said flow of corona ions by said electrostatic latent image to form, on said dielectric coated image receiving body, an electrostatic charge image corresponding to an image to be recorded, said process comprising a further step of making a radius of curvature of said screen-shaped photosensitive body different from that of said dielectric coated image receiving body, arranging these two bodies in opposed and spaced apart relation and driving said two bodies at surface speeds which are different from each other.
Claim 2
Dependent Claim
158 words
An electrographic process comprising using a screen-shaped photosensitive body composed of at least one electric conductive layer and photoconductive layer, uniformly charging said photoconductive layer, illuminating said screen-shaped photosensitive body with a light image corresponding to a picture image of a manuscript to be recorded so as to form an electrostatic latent image on said photoconductive layer, directing a flow of corona ions through said screen-shaped photosensitive body toward a dielectric coated image receiving body and controlling said flow of corona ions by said electrostatic latent image to form, on said dielectric coated image receiving body, an electrostatic charge image corresponding to an image to be recorded, said process comprising a further step of making a radius of curvature of said screen-shaped photosensitive body different from that of said dielectric coated image receiving body, arranging these two bodies in opposed and spaced apart relation and driving said two bodies at surface speeds which are different from each other.
Claim 3
Dependent Claim
58 words
An electrographic process as claimed in claim 1, wherein a manuscript scanning speed is made different from a surface speed of said screen-shaped photosensitive body and a cylindrical concave lens for changing a projection magnification in the manuscript scanning direction only is arranged in an optical system for projecting a manuscript picture image on said screen-shaped photosensitive body.
Claim 4
Dependent Claim
58 words
An electrographic process as claimed in claim 1, wherein a manuscript scanning speed is made different from a moving speed of said screen-shaped photosensitive body and a cylindrical convex lens for changing a projection magnification in the manuscript scanning direction only is arranged in an optical system for projecting a manuscript picture image on said screen-shaped photosensitive body.
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) | 1981-02-27 | 1981-08-29 | 1982-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-02-27 | 1985-08-29 | 1986-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-02-27 | 1989-08-29 | 1990-02-28 | $7700.00 | Window Closed / Lapsed |