US4251152A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrostatic apparatus for multi-image formation
Assignee: Ricoh Co Ltd
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Filing: 1978-10-05
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Granted: 1981-02-17
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Expires: 1998-10-05
Abstract
Abstract An apparatus for multi-image formation for use in electrophotography and electrostatic recording to permit the formation of two or more different latent electrostatic images on a dielectric or photoconductive material from different sources and synthesis of each of the different latent electrostatic images with an identical or a different polarity and potential.
Inventors
- 👤 Seiichi Miyakawa
- 👤 Takashi Yano
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:33
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/04; G03G15/043; G03G15/0435
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
189 words
An electrostatic apparatus for copying synthesized recorded information from at least two information sources onto a copy sheet comprising a photoconductive member adapted to receive a latent electrostatic image, a first charging means for charging said photoconductive member, a light source, and optical means for transmitting a light image of a first source of information onto said photoconductive member to form a first latent electrostatic image corresponding to the transmitted light image of said first source on said photoconductive member, second charging means for directly charging said photoconductive member to form a second latent electrostatic image of a second source of information on said photoconductive member whereby said second latent electrostatic image is formed on said photoconductive member while retaining said first latent electrostatic image, said second source of information including a dielectric ion permeable film disposed between said second source of information and said second charging means whereby actuation of said second charging means permits corona ions to pass through said film so as to form said second latent image of said second source of information on said photoconductive member, and means for developing said latent electrostatic images.
Claim 2
Dependent Claim
189 words
An electrostatic apparatus for copying synthesized recorded information from at least two information sources onto a copy sheet comprising a photoconductive member adapted to receive a latent electrostatic image, a first charging means for charging said photoconductive member, a light source, and optical means for transmitting a light image of a first source of information onto said photoconductive member to form a first latent electrostatic image corresponding to the transmitted light image of said first source on said photoconductive member, second charging means for directly charging said photoconductive member to form a second latent electrostatic image of a second source of information on said photoconductive member whereby said second latent electrostatic image is formed on said photoconductive member while retaining said first latent electrostatic image, said second source of information including a dielectric ion permeable film disposed between said second source of information and said second charging means whereby actuation of said second charging means permits corona ions to pass through said film so as to form said second latent image of said second source of information on said photoconductive member, and means for developing said latent electrostatic images.
Claim 3
Dependent Claim
39 words
An electrostatic apparatus as defined in claim 1, wherein said film has minute perforations therein to define said second source of recorded information whereby said second latent electrostatic image is formed by the corona ions passing through said perforations.
Claim 4
Dependent Claim
40 words
An electrostatic apparatus as defined in claim 2 wherein said film comprises a dielectric substrate having perforations therein and sheet material superposed on said perforated substrate, said sheet material having cut-out portions to define said second source of recorded information.
Claim 5
Dependent Claim
18 words
An electrostatic apparatus as defined in claim 3 and including means for rendering said sheet material electrically conductive.
Claim 6
Dependent Claim
17 words
An electrostatic apparatus as defined in claim 4 wherein said sheet material includes a thermal shrinking plastic.
Claim 7
Dependent Claim
16 words
An electrostatic apparatus as defined in claim 3 wherein said sheet material is a metallic foil.
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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) | 1984-02-17 | 1984-08-18 | 1985-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-02-17 | 1988-08-18 | 1989-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-02-17 | 1992-08-18 | 1993-02-17 | $7700.00 | Window Closed / Lapsed |