Flash lamp intensity control for electrostatographic reproductio

Details Flash lamp intensity control for electrostatographic reproductio Flash lamp intensity control for electrostatographic reproductio

1989-04-27

1991-02-12

Pendegrass, Joan H.

Photocopying

Contact printing

Light boxes

355228, 355 68, 355 69, G03G 1504, G03B 2780

Patent

active

049928295

ABSTRACT:
Flash lamp intensity control in which a small preflash lamp first exposes each document on the platen of an electrostatographic machine, a photosensor generates a signal representative of the intensity of the light reflected from the platen, and a controller increases power to the main flash exposure lamps in response to the signal where the measured intensity is less than the normal exposure intensity of the main flash lamps.

REFERENCES:
patent: Re32253 (1986-09-01), Bartulis et al.
patent: 4021112 (1977-05-01), Wilson
patent: 4027199 (1977-05-01), Johnson
patent: 4272188 (1981-06-01), Lehman
patent: 4334767 (1982-06-01), Lehman
patent: 4737819 (1988-04-01), Taniguchi
patent: 4794422 (1988-12-01), Lehman et al.

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