Patent ID: 8333371
Filing Date: 2012-12-18
Classification: B65H

Abstract:
1. A creasing device for making a crease on one sheet each, the creasing device comprising: a first member on which a linear convex-edged blade is formed in a direction perpendicular to a sheet conveying direction; a second member on which a concave-edged blade pairing with the convex-edged blade is formed; and a drive unit that drives the first and second members to relatively come close to and away from each other, when in a standby state, the drive unit keeps the first member and second member in a state where a face of the convex-edged blade to have contact with the sheet is tilted so that a back side of the convex-edge blade is closer to the second member than a front side of the convex-edge blade; and at the time of making a crease on the sheet, the drive unit causes the first member and second member to be in a state where the convex-edged blade and the concave-edged blade have point contact with each other via the sheet held therebetween so as to initiate a creasing movement by a rotation movement thereof.