US3844652A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transfer printing apparatus of electrophotographic apparatus
Assignee: Katsuragawa Electric Co Ltd
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Filing: 1974-01-16
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Granted: 1974-10-29
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Expires: 1994-01-16
Abstract
Abstract In transfer printing apparatus of electrophotographic apparatus of the type wherein a receptor sheet is urged against a photosensitive element carried by a rotary drum by means of a transfer printing roller so as to transfer print an electrostatic latent image formed on the photosensitive element. Preferably, the separating member comprises a pair of strips which are disposed at an angle with respect to the direction of movement of the receptor sheet. Onto the receptor sheet there is provided a stationary separating member between the receptor sheet and the photosensitive element.
Inventors
- 👤 R Suzuki
- 👤 S Miyakawa
- 👤 M Watanabe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 04:34
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/65; G03G15/6532
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
160 words
In apparatus for transfer printing of electrophotographic images comprising a rotary drum provided with a photosensitive element on which an electrostatic latent image is to be formed, a transfer printing roller for urging a receptor sheet through the nip between said roller and said photosensitive element and against the surface thereof so as to transfer print said electrostatic latent image onto said receptor sheet, and a separating member for separating said receptor sheet from said photosensitive element after transfer printing, the improvement wherein said separating member comprises a pair of stationary elongated members which are inclined in opposite directions with respect to the direction of movement of said receptor sheet and extend through said nip when the apparatus is in use for moving the receptor sheet relative to the surfaces of said elongated members which face said transfer printing roller and for separating the receptor sheet away from said photosensitive element after the receptor sheet has passed through said nip.
Claim 2
Dependent Claim
160 words
In apparatus for transfer printing of electrophotographic images comprising a rotary drum provided with a photosensitive element on which an electrostatic latent image is to be formed, a transfer printing roller for urging a receptor sheet through the nip between said roller and said photosensitive element and against the surface thereof so as to transfer print said electrostatic latent image onto said receptor sheet, and a separating member for separating said receptor sheet from said photosensitive element after transfer printing, the improvement wherein said separating member comprises a pair of stationary elongated members which are inclined in opposite directions with respect to the direction of movement of said receptor sheet and extend through said nip when the apparatus is in use for moving the receptor sheet relative to the surfaces of said elongated members which face said transfer printing roller and for separating the receptor sheet away from said photosensitive element after the receptor sheet has passed through said nip.
Claim 3
Dependent Claim
36 words
The transfer printing apparatus according to claim 1 wherein a plurality of transfer printing rollers are provided which are parallel with each other and are spaced apart in the direction of movement of said receptor sheet.
Claim 4
Dependent Claim
18 words
The transfer printing apparatus according to claim 1 wherein said elongated members are made of a synthetic resin.
Claim 5
Dependent Claim
16 words
The transfer printing apparatus according to claim 1 wherein said elongated members are made of metal.
Claim 6
Dependent Claim
36 words
The transfer printing apparatus according to claim 1 wherein said stationary separating means comprises a pair of stationary strips which are inclined in opposite directions with respect to the direction of movement of said receptor sheet.
Claim 7
Dependent Claim
133 words
In apparatus for transfer printing of electrophotographic images comprising a rotary drum provided with a photosensitive element on which an electrostatic image is to be formed, a receptor sheet and a transfer printing roller for urging said receptor sheet against the surface of said photosensitive element to transfer print said latent image onto said receptor sheet, the improvement which comprises a pair of stationary separating strips interposed between said receptor sheet and said photosensitive element, each of said stationary strips being disposed at an angle theta with respect to the direction of mOvement of said receptor sheet, said angle theta satisfying a relation a/W < sin theta where W represents the contact width between the peripheries of the photosensitive element and the transfer printing roller and a the width of said separating strip.
Claim 8
Dependent Claim
133 words
In apparatus for transfer printing of electrophotographic images comprising a rotary drum provided with a photosensitive element on which an electrostatic image is to be formed, a receptor sheet and a transfer printing roller for urging said receptor sheet against the surface of said photosensitive element to transfer print said latent image onto said receptor sheet, the improvement which comprises a pair of stationary separating strips interposed between said receptor sheet and said photosensitive element, each of said stationary strips being disposed at an angle theta with respect to the direction of mOvement of said receptor sheet, said angle theta satisfying a relation a/W < sin theta where W represents the contact width between the peripheries of the photosensitive element and the transfer printing roller and a the width of said separating strip.
References Cited (Backward Citations)
US3069990A
Cited
DE1175079B
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-10-28 | 1978-04-29 | 1978-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-28 | 1982-04-29 | 1982-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-28 | 1986-04-29 | 1986-10-29 | $7700.00 | Window Closed / Lapsed |