Photocopying – Contact printing – Light boxes
Patent
1994-10-17
1996-03-26
Grimley, A. T.
Photocopying
Contact printing
Light boxes
271308, 355317, G03G 1516
Patent
active
055025544
ABSTRACT:
In a transfer unit of a non-contact roller transfer method, both ends of a transfer roller shaft are supported independently of each other so as to be movable upward and downward, and an upward pushing force is provided thereto. A gap maintaining roller provided in the vicinity of each end portion of the transfer roller shaft is always in contact with the surface of a photoreceptor drum so that the gap between the surface of the photoreceptor drum and the transfer roller is maintained uniform and fixed. Further, both ends of a pre-transfer guide for guiding the sheet to the photoreceptor drum are supported in a manner such that the movement of each end accords with the movement of the end portion of the transfer roller, so that the distance between the photoreceptor drum and the pre-transfer guide is maintained uniform and fixed.
REFERENCES:
patent: 4431301 (1984-02-01), Hashimoto et al.
patent: 4766459 (1988-08-01), Jinbo et al.
patent: 4908674 (1990-03-01), Fukano et al.
patent: 4943863 (1990-07-01), Ainoya
patent: 5138374 (1992-08-01), Bellis
patent: 5189469 (1993-02-01), Endo
patent: 5276489 (1994-01-01), Kikuchi et al.
patent: 5345299 (1994-09-01), Hashizume et al.
Hayashi Shigeki
Ishida Naoyuki
Kotera Shinichi
Morishita Hiroki
Moriuchi Yasuhiko
Dang Thu
Grimley A. T.
Mita Industrial Co. Ltd.
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