Abstract: There is disclosed a device for feeding a number of stacked documents accurately one by one into a machine such as a copy machine or facsimile including a table for loading the stacked documents, a pick-up roll for picking up the lowermost document of the stacked documents, and a pick-up rubber for cooperating with the pick-up roll so as to only convey the lowermost document into the machine. The free end portion of the pick-up rubber is pressed against a portion of the surface of the pick-up roll by a compression spring via a pressure plate. There are at least one pair of protrusions each positioned on one end portion of the circumferential surface of the pick-up roll and symmetrically facing each other along a line parallel with the axis of the pick-up roll.

Abstract: The present invention describes an automatic paper sheet feeding apparatus for automatically feeding a number of paper sheets one by one at regular intervals. A cylindrical bushing 10 inserted in and fixed at a automatic paper sheet feed roller shaft 3 has a detent part 10b and an elastic piece 10a allowing elastic motion to a direction of the paper sheet feed roller shaft 3. A cylindrical part 20a united with an automatic paper sheet feed gear 20 has an elastic piece 20b allowing elastic motion in the paper sheet feed roller shaft 3 direction and confronted with the elastic piece 10a of the bushing 10. The automatic paper sheet feed roller shaft 3 is inserted into the automatic paper sheet feed gear 20 through the bushing 10 so that the automatic paper sheet feed gear 20 can rotate. The elastic piece 20b of the automatic paper sheet feed gear 20 is engaged with the detent part 10 b of the bushing 10, so that the automatic paper sheet feeding operation is performed.

Abstract: There is disclosed a device for feeding documents stacked in a document tray for use in a facsimile machine. The device includes a pick-up roll for picking up the undermost document of the stacked documents, a transferring roll for transferring the document picked up by the pick-up roll, the two rolls being mounted parallel and synchronized with each other, a shaft for rotating the pick-up roll, a bushing having a cylindrical portion and a notch portion and fixedly mounted on one end portion of the shaft, a driving gear having a cylindrical portion and a plurality of notch portions and loosely mounted on the end portion of the shaft with the cylindrical portions opposing each other, and a clutch spring having an internal end and external end and encircling the two cylindrical portions with the internal and external ends respectively caught in the notch portions.

Abstract: A paper feeding device for a facsimile machine, photocopier or the like is provided. The device includes a feed roller rotatably mounted on an axle which is supported by a frame. The axle is attached by a bushing and a spring clutch to a paper feeding gear which is driven by a suitable device or motor. The feed roller includes a sleeve arranged to co-operate, via a groove, with a spring pin fixed to the axle so as to provide a lost-motion mechanism between the shaft and the sleeve. A gear is arranged to drive a transfer roller faster than the gear drives the axle. In use, when paper is present between rollers, the pin is at one end of the groove. After a sheet of paper has been fed from the feed roller to the transfer roller, the feed roller will stop and not be driven by the gear until the spring pin of the lost motion mechanism has rotated from one end of the groove to the other end.