G - Physics – 03 – B
Patent
G - Physics
03
B
95/25
G03B 27/54 (2006.01) G03G 15/04 (2006.01)
Patent
CA 1057992
EXPOSURE DEVICE FOR A XEROGRAPHIC COPYING MACHINE ABSTRACT OF THE DISCLOSURE 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 con- tact with the plate and guide rail. -1-
259353
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