Patent ID: 8936239
Filing Date: 2015-01-20
Classification: B41J,B65G,B65H

Abstract:
1. A sheet take-out apparatus, comprising: a take-out unit configured to take out a plurality of sheets in a stacked state one by one on a conveying route; a separation unit configured to shift and to separate overlapping sheets among the plurality of sheets taken out by the take-out unit on the conveying route, the overlapping sheets including a preceding sheet and a succeeding sheet, the separation unit being arranged downstream from the take-out unit on the conveying route, and the separation unit including a first feed roller on one side of the conveying route and a first separation roller opposite to the first feed roller on the other side of the conveying route to apply a separation force to the overlapping sheets; an overlapping detector configured to detect overlapping sheets that have not been separated by the separation unit; and a re-separation unit configured to clamp and stop, decelerate, or reversely rotate a rear end of the succeeding sheet detected by the overlapping detector along a conveying direction to re-separate the overlapping sheets, the re-separation unit including: a drawing roller on the same side of the first feed roller and a pinch roller on the same side of the first separation roller and arranged downstream from the separation unit on the conveying route to draw out the sheet from the separation unit, the rotation direction and speed of the drawing roller driven by a motor, the pinch roller maintained at a fixed pressure against the drawing roller to rotate in accordance with the drawing roller, and a conveying roller arranged downstream from the drawing roller and the pinch roller, the conveying roller being arranged to receive a front end of the preceding sheet and to convey the preceding sheet, wherein the re-separation unit operates such that the rotational speed of the drawing roller is stopped, decelerated, or reversely rotated while the drawing roller and the pinch roller clamp the rear end of the succeeding sheet.