Document jam detector for copier

Details Document jam detector for copier Document jam detector for copier

1976-02-05

1977-05-10

Saifer, Robert W.

Sheet feeding or delivering

Feeding

With means to interrupt feeding

B65H 714

Patent

active

040224600

ABSTRACT:
A circuit for detecting documents jammed at the entry to an image fixing station in a copier includes a latch-controlled timer. Energization of a paper feed clutch sets the latch to initiate a timing cycle. A photoelectric circuit indicates whether the trailing edge of a document being fed to the image fixing station has cleared the entry. The proper output from this circuit clears the latch and interrupts the timing cycle. If the timer times out before the entry is cleared, the timer output is driven to a jam-indicating state.

REFERENCES:
patent: 3603680 (1971-09-01), Barton
patent: 3626956 (1971-12-01), Sauder
patent: 3693969 (1972-09-01), Sakamaki et al.
patent: 3920328 (1975-11-01), Toto et al.

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