Exposure control device

Details Exposure control device Exposure control device

1975-01-27

1976-10-12

Moses, R. L.

Photocopying

Projection printing and copying cameras

Combined with or convertible to a contact printer

355 14, 355 16, 355 66, 355 67, G03G 1500

Patent

active

039854388

ABSTRACT:
An exposure control device to be incorporated in an electrophotographic copying apparatus of the full frame exposure type with a moving photoreceptor, in which device a lens for projecting a light image of an original placed on a stationary platform onto the moving photoreceptor is adapted, during the flashing period of flash lamps for illuminating the original, to move in the same direction as the photoreceptor at a rate 1/m+1 times the moving rate of the photoreceptor for full frame exposure, by which arrangement, not only sufficient duration of flashing time of the flash lamps is available in high speed copying with consequent long life of the flash lamps, but definite, clear copies with high image resolution can be obtained.

REFERENCES:
patent: 3062108 (1962-11-01), Mayo
patent: 3432231 (1969-03-01), Gardner
patent: 3547533 (1970-12-01), Stokes et al.
patent: 3709603 (1973-01-01), Furuichi
patent: 3834807 (1974-09-01), Fuller et al.

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