Patent ID: 8317180
Filing Date: 2012-11-27
Classification: B42C,B65H,G03G

Abstract:
1. A sheet finisher comprising: a folding unit configured to fold a center of a sheet bundle; first and second rollers that move along a direction of the fold while nipping and pressing the fold of the sheet bundle conveyed from the folding unit and reinforce the fold; and a drive section configured to move the first and second rollers along the direction of the fold from a standby position that is away from an edge of the sheet bundle, wherein a position of the first roller is fixed in a thickness direction of the sheet bundle, and a position of the second roller is movable in the thickness direction of the sheet bundle, the first and second rollers are separated from each other in the thickness direction of the sheet bundle at the standby position, and when the first and the second rollers reach a nearest position to the edge of the sheet bundle of a predetermined size, a separation between the first and second rollers becomes minimum, and there exists the fold of the sheet bundle between the first and second rollers at the nearest position.