Photographic control device

Details Photographic control device Photographic control device

1986-08-26

1988-08-23

Corbin, John K.

Photocopying

Contact printing

Light boxes

350315, 354 15, 355 32, 355 35, G02B 2602, G02B 522, G03B 3100, G03B 2732

Patent

active

047657162

ABSTRACT:
A photographic control device for scanner and exposure control system calibration in a photographic printer includes a carrier disk to present an open scan aperture in the scan gate for normal printer operation, and selectively a plurality of control patches in the scan gate for calibration of the scanner at startup. The disk is driven by a stepping motor and timing belt, the disk position being controlled by a position sensor tied in with the drive motor. The disk is mounted by three rotatable bearings spaced around its periphery.

REFERENCES:
patent: 3704655 (1972-12-01), Fryklund et al.
patent: 3836928 (1974-09-01), Koleff et al.
patent: 3959800 (1976-05-01), Friedel
patent: 4236817 (1980-12-01), Hofstetter
patent: 4405206 (1983-09-01), Ekholm

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