| 摘要 |
<p>PURPOSE:To aim at the centering of roll paper by enlarging the diameter of a shaft on one side of both first and second supporting shafts supporting the roll paper, rotating them simultaneously and giving tension to the roll paper, while making a gear of a shaft on the other shiftable and holding the paper between. CONSTITUTION:A supporting shaft 22 out of both first and second supporting shafts 10, 22, where roll paper is mounted each, is formed into a large diameter, and these shafts are simultaneously rotated by rotation of the roll paper, but rotational peripheral speed of the supporting shaft 22 comes faster so that tension is given to the roll paper. In addition, gears 24L, 24R at both ends of the shaft 22 are made movable in both directions, and turned by rotation of gears 15, 16 of the shaft 10 via idle gears 18, 19, but they are held between thread parts 23L, 23R of the supporting shaft 22 and moved in the separate direction. Accordingly, when an edge in the one-sided part of the roll paper hits on one side of bearings 25L, 25R of the gears 24L, 24R, rotation of the gear is controlled, and moved by the thread parts, thus the offset is corrected.</p> |
