Image forming apparatus

Details Image forming apparatus Image forming apparatus

1988-10-24

1990-06-19

Pendegrass, Joan H.

Photocopying

Contact printing

Light boxes

355274, G03G 1516

Patent

active

049357760

ABSTRACT:
A transfer medium supporting member which supports a transfer medium to which a toner image formed on a photoconductive member of an image forming apparatus is repeatedly transferred for required number of times, and a potential sensor for measuring the potential of a dielectric screen onto which the transfer medium is electrostatically adsorbed by electrification are provided in combination with each other. The potential of the dielectric screen electrified only by output of an adsorption charger is measured by the potential sensor to judge the electrification capacity of the dielectric screen, and a visual or sound warning is given when the electrification capacity is in a predetermined state. And separately from or in combination with giving the warning, the operation of the apparatus is stopped. Further, separately from them, both or one of outputs of the adsorption charger and a transfer charger for electrostatically transferring a toner image formed on the photoconductive member to the transfer medium are controlled.

REFERENCES:
patent: 4110031 (1978-08-01), Ebi et al.

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