Drive power transmission

Details Drive power transmission Drive power transmission

1997-07-07

2000-02-15

Bollinger, David H.

Sheet feeding or delivering

Feeding

Separator and conveyor

271116, 271118, B65H 500

Patent

active

060243562

ABSTRACT:
A drive power transmission system located between a paper feed roller and a motor for transmitting a drive power to the paper feed roller from the motor only when a load acting on the paper feed roller in a direction opposite a rotating direction of the paper feed roller is smaller than a certain amount. The drive power transmission system is incorporated in an image processing device such as a facsimile machine. The paper feed roller and other rollers such as separation roller and retard roller cooperate to feed a sheet of paper from a stack of paper on a paper tray one sheet at a time. Eventually all the sheets are picked up from the paper tray and the paper feed roller directly contacts the paper tray. In this case, an excessively large shock or load acts on the paper feed roller and various associated parts which are provided to drive the paper feed roller such as a gear train mechanism. The drive power transmission system includes a coil spring which is unwound to disconnect the motor from the paper feed roller so as not to transmit the drive power to the paper feed roller when such a large load is exerted on the paper feed roller.

REFERENCES:
patent: 5624109 (1997-04-01), Tanaka

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