Patent ID: 7690632
Filing Date: 2010-04-06
Classification: B65H,G03G

Abstract:
1. A sheet bending apparatus for performing a center-folding processing to a stack of a plurality of recording sheets which are placed in a sheet holding member and whose both side ends are aligned, the center-folding processing being performed in a vicinity of a central portion in a sheet conveyance direction of the sheet holding member, the sheet bending apparatus comprising: a pair of upper side end aligning members positioned on upstream in the sheet conveyance direction on the sheet holding member and being movable equally in opposite width directions of the sheet holding member, the width directions being transverse to the sheet conveyance direction; a pair of lower side end aligning members positioned on downstream in the sheet conveyance direction on the sheet holding member and being movable equally in opposite width directions of the sheet holding member and independently from the upper side end aligning members; a pair of center-folding rollers and a bending blade facing each other and positioned in a vicinity of a central portion in the sheet conveyance direction of the sheet holding member; and a restricting member movable along a sheet conveyance path of the sheet holding member, wherein the pair of upper side end aligning members approach from opposite width sides of the sheet placed in the sheet holding member on upstream of the pair of center-folding rollers and the bending blade; the pair of lower side end aligning members approach from opposite width sides of the sheet placed in the sheet holding member on downstream of the center-folding rollers and the bending blade; the upper side end aligning members and the lower side end aligning members align the side ends of the recording sheet placed in the sheet holding member in a state where the recording sheet is restricted by the restricting member.