Patent ID: 9333764
Filing Date: 2016-05-10
CPC Classification: B41J,Y10T

Claim Text:
1. A transfer apparatus for transferring an image formed on a transfer film to a recording medium, comprising: an image transfer section having a heating member and a transfer platen, the heating member and the transfer platen shifting between an actuation position in which the heating member moves toward the transfer platen to press-contact the transfer film to the recording medium and a retracted position in which the heating member retracts from the transfer platen; a recording medium transport device for transporting the recording medium; a peeling member disposed downstream of the image transfer section in a transfer film transport direction adapted to peel off the transfer film from the recording medium; a transfer film transport device disposed downstream of the peeling member in the transfer film transport direction for transporting the transfer film; a transfer film feeding device for feeding the transfer film at an upstream side of the recording medium in the transfer film transport direction when transferring the image formed on the transfer film to the recording medium, and including a transfer film carry roller adapted to nip the transfer film in between a supply spool wound around with an unused transfer film and a wind spool wound around with a used transfer film and transport the transfer film; a driving device to drive the transfer film feeding device; and a control device for controlling a transfer film transport amount by the transfer film feeding device, wherein the control device is configured to control the transfer film feeding device to increase the transfer film transport amount of the transfer film feeding device larger than a recording medium transport amount of the recording medium transport device during image transfer to sag the transfer film on the upstream side of the recording medium, and to decrease the transfer film transport amount of the transfer film feeding device for a period during which a rear end of the recording medium passes through the image transfer section and arrives at the peeling member to decrease a sag amount of the transfer film.