US3890040A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Induction imaging apparatus
Assignee: Xerox Corp
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Filing: 1973-08-29
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Granted: 1975-06-17
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Expires: 1993-08-29
Abstract
Abstract A process and apparatus for image reproduction wherein the process comprises the steps of contacting a charge blocking surface on a photoreceptive body with a developer material containing charged toner particles, providing an electric field of predetermined polarity between the photoreceptor and a transfer medium for attracting the toner particles toward the photoreceptor surface, subjecting the photoreceptor to activating radiation in image configuration for inducing an electrostatic charge pattern in image configuration on the photoreceptor near an interface between the blocking layer and the developer material and providing an electric field of opposite polarity between the photoreceptor and the transfer medium for transferring the toner particles in image configuration to the transfer medium. Automated copying apparatus and photographic apparatus in accordance with features of the invention are provided.
Inventors
- 👤 Fred W Schmidlin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 02:53
CPC Classifications
G; G03; G03G; G03G17/00; G03G17/04; G03G15/00; G03G15/22; G03G15/34; G03G15/344; G03G2217/00; G03G2217/0091
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
359 words
An imaging apparatus comprising: a first member including a thin layer of photoconductive material overlying a layer of material which produces an electrical charge blocking contact with said photoconductive material; first transport means for transporting said first member through imaging and development stations sequentially; a second member; second transport means for bringing said second member into contact with said first member, for transporting said second member through imaging and developing stations in contact with said first member and for separating said second member from said first member at a location subsequent to a development station, said second transport means including means to apply a second electrical potential to said second member at a location preceding contact between said first and second member for causing image development material to adhere to the surface of said second member and means to apply said second electrical potential to said second member at a location subsequent to a development station for causing a developed image to adhere to the surface of said second member after separation of said first and second members; means for depositing an image developing material including charged toner particles on said second member in a location preceding contact between said first and second members; an imaging station including means for exposing said photoconductive layer of said first member and means for applying a first electrical potential between said first and second members to provide an electrostatic image on the photoconductive surface of said first member; a development station including means for applying said second electrical potential between said first and second members, said second electrical potential having a polarity opposite to that of said first electrical potential; and a transfer station including means for transferring a developed image from said second member to a recordingg member. 2. The imaging apparatus as defined in claim 1 wherein said second member comprises an endless belt and a plurality of closely spaced and electrically insulated conductive segments, each said segment having a longitudinal axis extending in a direction perpendicular to a direction of motion of said second member and having a surface which is substantially coincident with a surface of said belt.
Claim 2
Dependent Claim
50 words
The imaging apparatus as defined in claim 1 wherein said first transport means comprises an endless belt of a transparent electrically insulating material and wherein said layer of material of said first member which produces an electrical charge blocking contact with said photoconductive layer is a thin transparent conductive film.
Claim 3
Dependent Claim
38 words
The imaging apparatus as defined in claim 1 and further including a first cleaning means for cleaning image developing material from said first member and a second cleaning means for cleaning image developing material from said second member.
References Cited (Backward Citations)
US3511651A
Cited
US3703376A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-06-16 | 1978-12-16 | 1979-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-16 | 1982-12-16 | 1983-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-16 | 1986-12-16 | 1987-06-17 | $7700.00 | Window Closed / Lapsed |