Patent ID: 7422385
Filing Date: 2008-09-09
Classification: B65H

Abstract:
1. A printing paper winding device comprising: a winding shaft for winding on a band-like printing paper received from a printer; a drive unit for rotationally driving the winding shaft; a tension roller that contacts the printing paper upstream of the winding shaft and is operable to apply tension to the printing paper by reciprocation of the tension roller through a prescribed tension region, following the winding of the printing paper; a first sensor and a second sensor operable for detecting the portion of the prescribed tension region in which the tension roller is positioned; and a winding control unit operable for determining, based on output signals of the first sensor and second sensor, whether a part of the prescribed tension region in which the tension roller is then positioned is a first tension region in which the bending angle of the winding path of the printing paper becomes minimized, a second tension region, a third tension region, or a fourth tension region in which the bending angle of the winding path of the printing paper becomes maximized, wherein the tension regions are arranged continuously from the first to the fourth tension region, with successive regions adjacent to each other; and the winding control unit is operable to control the drive unit to limit the tension roller to the tension region in which winding can be conducted in the direction such that the bending angle of the winding path that follows the winding of the printing paper is close to a more obtuse angle than to a more acute angle.