Sheet feeding or delivering – Feeding – With means to interrupt feeding
Patent
1974-09-30
1976-04-06
Blunk, Evon C.
Sheet feeding or delivering
Feeding
With means to interrupt feeding
271110, 340259, 355 14, B65H 706
Patent
active
039485102
ABSTRACT:
Timers measure the length of time for the leading edge of the first copy sheet to reach a sensing point at the discharge side of the machine after the copy operation is started and de-energize the machine if the measured time is longer than a predetermined time value, indicating that the first sheet jammed and did not reach the sensing point. If the first sheet reaches the sensing point in less than the predetermined time indicating proper feeding thereof, the length of time between the sensing of the leading edge and the trailing edge of the first sheet at the sensing point is measured, and the machine is deenergized if the measured time is longer than another predetermined value, indicating that the first sheet jammed at the sensing point. If the first sheet passes the sensing point normally (the machine is not de-energized), the length of time between the sensing of the trailing edge of the first sheet and the leading edge of the second sheet at the sensing point is measured, and the machine is de-energized if the measured time is longer than still another predetermined value, indicating that the second sheet jammed and did not reach the sensing point. If the second sheet passes the sensing point normally (the machine is not de-energized), the latter two operations are alternately performed for subsequent sheets until a jam is detected and the machine de-energized or the copying operation is completed without a jam.
REFERENCES:
patent: 3355592 (1967-11-01), Muir
patent: 3693969 (1972-09-01), Sakamaki et al.
patent: 3833896 (1974-09-01), Suzuki
Iwamoto Minoru
Noguchi Koichi
Blunk Evon C.
Jordan Frank J.
Ricoh Co. Ltd.
Stoner Jr. Bruce H.
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