Non-linear selectively variable copy contrast adjustment device

Details Non-linear selectively variable copy contrast adjustment device Non-linear selectively variable copy contrast adjustment device

1993-10-28

1995-03-21

Royer, William J.

Photocopying

Contact printing

Light boxes

355 69, G03G 2100

Patent

active

054001226

ABSTRACT:
An electrostatographic printing apparatus adapted to provide selectively variable copy contrast, including a movable control member and a system for providing non-linearly variable contrast control in response to selective displacement of the control member, the control member having non-linear sensitivity to selective displacement thereof such that the variable copy contrast does not have a linear relation to relative displacement of the control member.

REFERENCES:
patent: 3679967 (1972-07-01), Staker
patent: 4640603 (1987-02-01), Honma
patent: 4699502 (1987-10-01), Araki et al.
patent: 4702590 (1987-10-01), Usami
patent: 4714945 (1987-12-01), Fujiwara et al.
patent: 4912505 (1990-03-01), Larson
patent: 5075725 (1991-12-01), Rushing et al.
patent: 5274421 (1993-12-01), Takahashi

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