Patent Number: 6,168,147

Title: Transmission mechanism for pick-up roller

Abstract: A drive power transmission mechanism situated between a drive motor and a pick-up roller for transmitting a drive power to the pick-up roller from the drive motor to rotate the pick-up roller under a normal condition. The rotating pick-up roller picks up a sheet at a time from a stack of sheets piled up on a paper feed tray. The transmission mechanism includes a torque limiter that interrupts drive power transmission to the pick-up roller from the drive motor when the pick-up roller contacts an empty paper tray. The drive power transmission mechanism also includes a clutch for preventing drive power transmission from the pick-up roller to the drive motor. The drive power transmission from the pick-up roller to the drive motor occurs, for example, when both the pick-up roller and a feed roller contact the same sheet and the pick-up roller rotates faster than a predetermined speed.

Inventors: Nose; Yoshitaka (Kyoto, JP), Shige; Daisuke (Kyoto, JP)

Assignee: Murata Kikai Kabushiki Kaisha

International Classification: B65H 33/08 (20060101); B65H 33/00 (20060101); B65H 005/00 ()

Expiration Date: 01/02/2018