Drum unit exchange time indicating device for image forming appa

Details Drum unit exchange time indicating device for image forming appa Drum unit exchange time indicating device for image forming appa

1987-03-03

1988-06-14

Grimley, A. T.

Photocopying

Projection printing and copying cameras

Combined with or convertible to a contact printer

355 3DR, 355 14SH, G03G 1500

Patent

active

047514841

ABSTRACT:
A drum unit exchange time indicating device for image forming apparatus comprises, an integrated signal output means to give output of integrated signal added up according to the time of use of the drum unit, a life signal output means to give output of drum unit life signal when said integrated signal exceeds predetermined value and a paper-feed mode changing means to change the mode of paper-feeding into an extraordinary mode when said drum unit life signal is detected.

REFERENCES:
patent: 3698805 (1972-10-01), Hickey et al.
patent: 4436414 (1984-03-01), Kamiyama et al.
patent: 4496237 (1985-01-01), Schron
patent: 4551000 (1985-11-01), Kanemitsu et al.
patent: 4563079 (1986-01-01), Inuzuka et al.

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