Corona deterioration and moisture compensation for transfer unit

Details Corona deterioration and moisture compensation for transfer unit Corona deterioration and moisture compensation for transfer unit

1990-12-18

1994-03-01

Fuller, Benjamin R.

Photocopying

Contact printing

Light boxes

355208, 355274, 355 30, 355271, G03G 1514

Patent

active

052912531

ABSTRACT:
A transfer apparatus for electrophotography is disclosed in which the resistance values of a transfer belt and the recording paper are measured, and the current value applied to a device for charging a member is set on the basis of the electrical resistance values. The charging device of the transfer belt is adapted to be taken up and reeled out and to circulate along a track. This configuration assures a stable transfer characteristic against the secular environmental variations of the component elements, lengthens the intervals of replacement of the charged member, and hence increases the mechanical life of the transfer apparatus and the electrophotographic apparatus using the same.

REFERENCES:
patent: 3642362 (1972-02-01), Mueller
patent: 3837741 (1974-09-01), Spencer
patent: 4076407 (1978-02-01), Place, Jr.
patent: 4134147 (1979-01-01), Watanabe
patent: 4401383 (1983-08-01), Suzuki et al.
patent: 4676627 (1987-06-01), Ohno
patent: 4772918 (1988-09-01), Karasawa et al.
patent: 4912515 (1990-03-01), Amemiya et al.
patent: 5036360 (1991-07-01), Paxon et al.

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