Copying machine

Details Copying machine Copying machine

1991-04-16

1992-06-30

Grimley, A. T.

Photocopying

Contact printing

Light boxes

355 67, 355 69, 355208, G03G 2100

Patent

active

051267934

ABSTRACT:
A copying machine having a plurality of blank lamps for removing charges on a non-used area of a photoconductor included in the copy machine for copying an original image includes a unit for generating a PWM signal having a variable pulse width, a unit for converting the PWM signal into a voltage signal based on the pulse width of the PWM signal and supplying the voltage signal, and a unit for controlling turning on and off of the blank lamps based on the voltage signal.

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patent: 4806975 (1989-02-01), Godlove et al.
patent: 4811047 (1989-03-01), Hosaka et al.
patent: 5030887 (1991-07-01), Guisinger

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