Image forming apparatus featuring a constant contact-pressure dr

Details Image forming apparatus featuring a constant contact-pressure dr Image forming apparatus featuring a constant contact-pressure dr

1990-03-09

1991-12-03

Grimley, A. T.

Photocopying

Contact printing

Light boxes

74 63, 74 68, 355282, 355295, 355296, G03G 1502

Patent

active

050703668

ABSTRACT:
An image forming apparatus including an image bearing member and a rotatable member such as a transfer roller, a charging roller or a cleaning roller press-contacted to the image bearing member in relation to an image formation process on the image bearing member. A coupling is employed for transmitting the driving force from a driving power source to the rotatable member, so that the state of press-contact between the image bearing member and the rotatable member is maintained substantially uniform along the longitudinal direction with stability.

REFERENCES:
patent: 2807233 (1957-09-01), Fitch
patent: 3063264 (1962-12-01), Forrest
patent: 3221566 (1965-12-01), Gelardi
patent: 3258988 (1966-07-01), Schmidt
patent: 3827800 (1974-08-01), Tanaka et al.
patent: 4257700 (1981-03-01), Tsuda et al.
patent: 4309803 (1982-01-01), Blaszak
patent: 4600929 (1986-07-01), Cardona et al.
patent: 4739370 (1988-04-01), Yoshida et al.

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