US4357092A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Image recording apparatus
Assignee: Konica Minolta Inc
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Filing: 1980-09-12
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Granted: 1982-11-02
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Expires: 2000-09-12
Abstract
Abstract In an electrophotographic copying apparatus a substantial saving of space is realized at the image-transfer-separation area by providing the transfer electrode with a shield having an open face opposite the photosensitive drum and an open end adjacent which a grounded separation roller is mounted. The separation roller acts as an end plate of the shield and receives a charge from the transfer electrode. The charged separation roller rotating at the same peripheral speed as the drum thereby attracts the transfer paper from the drum to the roller, thereby separating the paper from the drum.
Inventors
- 👤 Mitsuru Nagoshi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:18
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/14; G03G15/16; G03G15/163; G03G15/1635; Y; Y10; Y10S; Y10S271/00; Y10S271/90
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
145 words
In an image recording apparatus having the function that transfer paper is fed onto an image support and a developed image is transferred onto the transfer paper by making use of a transfer electrode device positioned in juxtaposition and opposite to the image support, and the image transfer paper is separated from the image support by a separation device, the improvement which comprises a shield for the transfer electrode device open at the side facing and opposite to said image support and open at the end downstream in the direction of movement of the transfer paper, and in which said separation device comprises an electrically conductive grounded member positioned closely adjacent the open end to form an end plate for said shield and on the other hand closely adjacent said image support, whereby said grounded separation device attracts the transfer paper off the image support.
Claim 2
Dependent Claim
145 words
In an image recording apparatus having the function that transfer paper is fed onto an image support and a developed image is transferred onto the transfer paper by making use of a transfer electrode device positioned in juxtaposition and opposite to the image support, and the image transfer paper is separated from the image support by a separation device, the improvement which comprises a shield for the transfer electrode device open at the side facing and opposite to said image support and open at the end downstream in the direction of movement of the transfer paper, and in which said separation device comprises an electrically conductive grounded member positioned closely adjacent the open end to form an end plate for said shield and on the other hand closely adjacent said image support, whereby said grounded separation device attracts the transfer paper off the image support.
Claim 3
Dependent Claim
44 words
The improvement in an image recording apparatus according to claim 1 in which said image support is a rotating photosensitive drum and said separation device comprises a roller whose surface rotates in the same direction and at the same peripheral speed as said drum.
Claim 4
Dependent Claim
19 words
The improvement in an image recording apparatus according to claim 2, comprising a paper guide supported from said roller.
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) | 1985-11-01 | 1986-05-03 | 1986-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-11-01 | 1990-05-03 | 1990-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-11-01 | 1994-05-03 | 1994-11-02 | $7700.00 | Window Closed / Lapsed |