Method and apparatus for controlling exposure and transference i

Details Method and apparatus for controlling exposure and transference i Method and apparatus for controlling exposure and transference i

1993-02-16

1995-08-22

Powell, Mark R.

G03G 1500

Patent

active

054448301

ABSTRACT:
A method and apparatus for controlling an exposure and preventing reverse charge in a printer of an electrophotographic developing system. A method for preventing reverse charge comprises the steps of: starting print paper feeding, turning on a charge unit, a register sensor and an exposing unit, and checking if the top of a paper reaches a transfer unit; if the top of the paper reaches the transfer unit, turning on the transfer unit; checking if the register sensor is turned off; if the register sensor is turned off, checking if it is time the bottom of the paper reaches the transfer unit; and if the time elapses, turning off the transfer unit, performing fusing, and turning off the charge unit.

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patent: 5164745 (1990-10-01), Matsuoka
patent: 5237371 (1993-08-01), Hori
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