Photocopying – Projection printing and copying cameras – Illumination systems or details
Patent
1976-09-13
1978-02-07
Griffin, Donald A.
Photocopying
Projection printing and copying cameras
Illumination systems or details
G03B 2754
Patent
active
040724174
ABSTRACT:
An exposure device for a copying machine has a light source unit, and a rail unit for supporting the former rigidly mounted to the machine. The light source unit includes an exposure lamp, a heater for heating the lamp, and a control sensor for energizing the heater until the lamp reaches a proper temperature. The rail unit includes a plate having an elongated exposure aperture therein, an elongated reflecting mirror along one side of the aperture, and a guide rail spaced from the plate along the other side of the aperture. A particular positional relationship must be maintained between the optical system and photoreceptor of a copying machine, the exposure lamp, and the exposure aperture. The present invention allows the light source to be mounted to and dismounted from the machine without disturbing this relationship. This is effected by providing (1) a projection on the light source unit which extends through the space between the plate and guide rail as the light source unit is slid along the plate and guide rail to limit the lateral movement of the light source unit, and (2) a spring which serves to stop the light unit when it reaches the proper position and to bias it into contact with the plate and guide rail.
REFERENCES:
patent: 3432232 (1969-03-01), Tompkins
patent: 3698815 (1972-10-01), Thomas
patent: 3779640 (1973-12-01), Kidd
patent: 3784304 (1974-01-01), Babin et al.
Griffin Donald A.
Rank Xerox Ltd.
Reichert Earl T.
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