Jam detecting device in the electrophotographic copying machine

Details Jam detecting device in the electrophotographic copying machine Jam detecting device in the electrophotographic copying machine

1976-12-06

1978-04-18

Stoner, Jr., Bruce H.

Photocopying

Projection printing and copying cameras

Combined with or convertible to a contact printer

271258, 355 13, G03G 1500, B65H 704

Patent

active

040849007

ABSTRACT:
A jam detecting device for detecting copy paper jamming occurring in an electrophotographic copying machine having a first circuit for detecting the presence of a copy paper which is ready to be fed into various processing stations, a second circuit for detecting the presence of the same copy paper at a position at which it is ready to be discharged out of the copying machine and a timer circuit for measuring the time interval between the detections by the first and second circuits and for producing, in the event the time interval exceeds a predetermined time, a signal indicative of a paper jam occurring in the machine.

REFERENCES:
patent: 3390878 (1968-07-01), MacNeill et al.
patent: 3495822 (1970-02-01), Cederbaum
patent: 3626956 (1971-12-01), Sauder
patent: 3663102 (1972-05-01), Zerfahs
patent: 3693969 (1972-09-01), Sakamaki et al.
patent: 3817134 (1974-06-01), Katayama et al.
patent: 3948510 (1976-04-01), Iwamoto et al.
patent: 4013357 (1977-03-01), Nakajima et al.

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