Patent ID: 8465012
Filing Date: 2013-06-18
Classification: B31F,B65H

Abstract:
1. A creasing device that creases sheets on a per-sheet basis, the creasing device comprising: a first member extending in a direction perpendicular to a sheet conveying direction and including a creasing blade, the; a second member extending in a direction perpendicular to the sheet conveying direction and including a creasing channel, the creasing channel allowing the creasing blade to be fitted thereinto with a sheet interposed between the creasing channel and the creasing blade; a drive unit that brings the first member and the second member into and out of contact with each other to cause a sheet stopped at a predetermined position to be pinched between the first and the second members and creased; a sheet retainer driven by the drive unit and brought into contact with a top surface of the second member with the sheet interposed between the sheet retainer and the second member to retain the sheet across a full width of the sheet; and a holding unit that holds the sheet retainer in a retaining state during creasing where the creasing blade and the creasing channel come into contact with each other with the sheet interposed therebetween, the contact starting at one point and developing in one direction, wherein the creasing blade and the creasing channel are configured to come into contact with each other starting at a first end of the first member and proceeding linearly to a second end of the first member.