TAKE-UP APPARATUS FOR REEL MATERIAL

摘要

A take-up apparatus for reel material of an image exposing device has a driven winding drum (54) and a sensor (64) provided to control the drive of the winding drum (54). The sensor (64) detects the position of the reel material (12) ahead of the winding drum (54). In this case, the drive of the winding drum (54) is controlled in such a manner that the reel material (12) forms a bulge (A) ahead of the winding drum (54) with a substantially constant curvature.