Patent ID: 7896330

Claim:
A binding processing apparatus comprising: a punching device; a sheet table on which sheets of paper punched by the punching device are stacked; a binding mechanism section in which a division ring type binder is simultaneously attached to a plurality of punch holes of one set of sheets of paper stacked on the sheet table; a first positioning mechanism for positioning the sheets of paper in a sheet conveyance direction; and a second positioning mechanism for positioning the sheets of paper in a direction perpendicular to the sheet conveyance direction, wherein the first and the second positioning mechanism position the sheets of paper so that the punch holes on the sheets of paper agree with a binding piece that simultaneously interlocks with the plurality of punch holes at a time of binder attaching processing, and the first positioning mechanism includes a sheet forward end position regulating plate capable of being retracted and provided at a forward end portion of the sheet table as a reference of aligning the forward end portions of the sheets of paper, and after one set of sheets of paper is positioned, the sheet forward end position regulating plate is retracted and the one set of sheets of paper are sent to the binding mechanism section.