Color filter unit

Details Color filter unit Color filter unit

1990-03-08

1990-12-04

Arnold, Bruce Y.

Photocopying

Contact printing

Light boxes

350315, 350318, 355 27, 355 35, G02B 522, G02B 700, G03B 2732, G03B 2772

Patent

active

049749374

ABSTRACT:
A filter unit includes a plurality of filter members, a filter drive mechanism, and a switching mechanism. One of the filter members is continuously engaged with the filter drive mechanism, so that it is moved toward and away from an optical path extending between an exposure light source and an image recording medium. On the other hand, remaining filter members are selectively engageable with the filter drive mechanism. This selective engagement is provided by the switching mechanism. After remaining one of the filters is selected and engaged with the filter drive mechanism, the selected filter is moved toward the optical path. In this instance, the filter member always engageable with the filter drive mechanism is retracted from the optical path.

REFERENCES:
patent: 4924255 (1990-05-01), Honaguchi et al.

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