Image forming apparatus with transfer medium and electrometer po

Details Image forming apparatus with transfer medium and electrometer po Image forming apparatus with transfer medium and electrometer po

1992-03-30

1994-01-11

Grimley, A. T.

Photocopying

Contact printing

Light boxes

355275, G03G 1516

Patent

active

052786137

ABSTRACT:
An image forming apparatus which insures stable image transfer at all times with no regard to aging and environment. An electrometer is located in close proximity to and opposite to a transfer region where an image carrier and a transfer medium face each other. A voltage to be applied to an electrode which applies a transfe voltage to the transfer medium is controlled in response to the output of the electrometer such that the electric field in the transfer region remains constant.

REFERENCES:
patent: 3837741 (1974-09-01), Spencer
patent: 4110031 (1978-08-01), Ebi et al.
patent: 4220699 (1980-09-01), Ishida et al.
patent: 4515460 (1985-05-01), Knechtel
patent: 4860048 (1989-08-01), Itoh et al.
patent: 4935776 (1990-06-01), Fukui
patent: 4984026 (1991-01-01), Nishise et al.
Patent Abstracts of Japan, vol. 7, No. 42 (P-177), Feb. 19, 1983, & JP-A-57-192981, Nov. 27, 1982, Tetsuya Abe, et al., "Copying Paper Separating Method for Electrostatic Copying Machine".
"Electrophotography", R. Schaffert, pp. 61 and 125, 1975.

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