Patent ID: 6969206

Claim:
A printing apparatus for forming an image on a web to be conveyed, comprising: a transfer unit for transferring the image onto the web; a conveyance mechanism for conveying the web to said transfer unit; and a tension generating mechanism for applying a tension to the web fed to the conveyance mechanism, wherein the tension generating mechanism comprises: a tension generating roller; a tension guide that is rotated in accordance with a magnitude of the tension generated in the tension generating roller; a first sensor for sensing the rotational position of the tension guide; and a tension controller for controlling a tension applied to the web by the tension generating roller upon a sensed signal of the first sensor by changing a manner by which said tension generating roller contacts said web, wherein the tension controller comprises: a driver for rotating the tension generating roller around a rotation shaft provided at an eccentric position; a pressing roller supported with an elastic body for pressing the web against the tension generating roller; and a controller for controlling the driver upon a sensed signal of the first sensor.