US4370048A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrostatic copying apparatus
Assignee: ROKYO SIBAURA DENKI KK
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Filing: 1981-02-11
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Granted: 1983-01-25
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Expires: 2001-02-11
Abstract
Abstract An electrostatic copying apparatus comprises a photosensitive drum, a transfer roller and a tape. The photosensitive drum includes first and second drum portions and a photosensitive layer which is laid on the outer periphery of the first drum portion and on which an image has been developed. The transfer roller in contact with the photosensitive layer, and cooperates with the photosensitive layer to clamp a sheet of paper to transfer the developed image onto the sheet of paper. The tape is in slidable contact with the outer periphery of the second drum portion for peeling the sheet of paper from the photosensitive drum after the image developed has been transferred to the sheet.
Inventors
- 👤 Kunihiro Shibuya
- 👤 Koachi Uchida
- 👤 Shinichi Hashimoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 21:15
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/65; G03G15/6532; G03G15/14; G03G15/16; G03G15/1665; G03G15/167; G03G15/1685; Y; Y10; Y10S; Y10S271/00; Y10S271/90
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
132 words
An apparatus for transferring a developed image to a sheet of paper comprising: a photosensitive drum having first and second portions, said drum including a photosensitive layer which is laid on the outer periphery of at least the first drum portion; a transfer roller including a surface portion formed of an elastic material and disposed in contact with the first and not the second drum portions, said transfer roller cooperating with the photosensitive layer to clamp the sheet of paper to transfer the developed image onto the sheet of paper; and a tape provided apart from said transfer roller and in slidable contact with the outer periphery of the second drum portion for peeling the sheet of paper from the photosensitive drum after the image developed has been transferred to the sheet.
Claim 2
Independent Claim
132 words
An apparatus for transferring a developed image to a sheet of paper comprising: a photosensitive drum having first and second portions, said drum including a photosensitive layer which is laid on the outer periphery of at least the first drum portion; a transfer roller including a surface portion formed of an elastic material and disposed in contact with the first and not the second drum portions, said transfer roller cooperating with the photosensitive layer to clamp the sheet of paper to transfer the developed image onto the sheet of paper; and a tape provided apart from said transfer roller and in slidable contact with the outer periphery of the second drum portion for peeling the sheet of paper from the photosensitive drum after the image developed has been transferred to the sheet.
Claim 3
Dependent Claim
20 words
Apparatus according to claim 1, wherein said photosensitive layer is laid on the outer periphery of the second drum portion.
Claim 4
Dependent Claim
67 words
Apparatus according to claim 2, wherein the transfer roller has substantially the same length as the photosensitive drum and includes a first roller portion disposed contiguous with the photosensitive layer laid on the outer periphery of the first drum section and a second roller section which is coaxially aligned with the first roller section and which has a diameter smaller than that of the first roller section.
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) | 1986-01-24 | 1986-07-26 | 1987-01-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-01-24 | 1990-07-26 | 1991-01-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-01-24 | 1994-07-26 | 1995-01-25 | $7700.00 | Window Closed / Lapsed |