Sheet feeding or delivering – Feeding – With means to interrupt feeding
Patent
1994-01-25
1995-03-07
Schacher, Richard A.
Sheet feeding or delivering
Feeding
With means to interrupt feeding
271225, 271902, B65H 900
Patent
active
053951042
ABSTRACT:
A paper conveying device overruns a document from a stop position and then, switches the document back so that the end of the document collies with a document abutting member provided in the stop position. At this time, the amount of overrun and the amount of switchback of the document are respectively set to the minimum ones required, to reduce the stress applied to the document, and the most suitable control is carried out even in a special mode (SDF mode) in which the document conveying speed is low. More specifically, at the time of the SDF mode, even if a stop instruction is given at timing T2, timing at which a conveying motor is turned off is delayed by a short time .increment.T. A distance A' from the timing T2 to the time when the conveying motor is completely stopped is detected, and the conveying motor is rotated in the reverse direction by a distance B' equal to the distance A'. The conveying motor is rotated in the reverse direction by position control. Consequently, in not only an ADF mode in which the document is conveyed at the standard speed but also the SDF mode in which the conveying speed is low, running distance data required for switchback control is obtained, thereby to make it possible to carry out the most suitable position control.
REFERENCES:
patent: 5197723 (1993-03-01), Yamada
patent: 5229816 (1993-07-01), Fujimoto
Harada Hiroyuki
Kida Yasuhiko
Mita Industrial Co. Ltd.
Sahr R. Lawrence
Schacher Richard A,.
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