| 摘要 |
PURPOSE:To heighten the stiffness of a sheet of paper and consequently prevent diagonal feeding by a method wherein a tray having the striking guide for the sheet of paper and a grooved part nearly normal to said guide and a sideward shifting roller of the sheet of paper provided at said grooved part are equipped. CONSTITUTION:A V-shape grooved part 9 is formed on the tray 8 of the sheet feeder nearly normal to its feeding direction and has an enough width for a sheet of paper 2 with lesser stiffness passing over the groove part 9 to slacken sufficiently. Under the conditions as mentioned above, at first, a sheet of paper 2 is placed on the tray 8 and then abutted against the striking guide 3 and, after that, fed out in order to abut againt a sheet feed roller 11. At this time, a detection element detects the sheet 2 and the sideward shifting pick-up roller 7, which is provided above the grooved part 9, is lowered by means of the detection signal from the element so far that the roller 7 caused not to buckle the sheet 2 in order to shift and feed the sheet 2 toward the guide 3 and further. In such a manner as mentioned above, because the sheet 2 is given the stiffness so as to increase the ridigity toward the guide 3, neither clearing of the striking member 3 by the sheet 2 nor curling of the sheet 2 occurs, resulting in realizing sure and correct positioning of the sheet and neither diagonal feeding nor jamming. |
