Exposure adjustment device for electrostatic copying apparatus

Details Exposure adjustment device for electrostatic copying apparatus Exposure adjustment device for electrostatic copying apparatus

1980-07-25

1982-11-30

Prescott, A. C.

Photocopying

Projection printing and copying cameras

Combined with or convertible to a contact printer

355 14C, 355 14E, 355 67, 355 69, G03G 1500

Patent

active

043613950

ABSTRACT:
An exposure adjustment device for an electrostatic copying apparatus provides that electric power of an exposure lamp is controlled by pressing a key so as to cause copy density over a surface of a photoconductive member to be adjusted. The exposure lamp is energized electrically subsequent to change a of copy density from a set level to a standard level predetermined for obtaining an ordinary copy when a period predetermined by a timer elapses after copying operation finished and/or after the key is operated. This results in that the copy density of exposure is accomplished properly even if an operator forgets to adjust the copy density of exposure.

REFERENCES:
patent: 3771867 (1973-11-01), Moser
patent: 3989374 (1976-11-01), Latka et al.
patent: 4136945 (1979-01-01), Stephens
patent: 4153364 (1979-05-01), Suzuki et al.

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