Patent ID: 8317179
Filing Date: 2012-11-27
Classification: B26D,B26F,B42B,B42C,B65H

Abstract:
1. A sheet post-processing device comprising: a stacker for stacking and storing sheets therein; a feeder for receiving the sheets and feeding the sheets toward the stacker; a folder for folding the sheets stored in the stacker to make a folded set of sheets; a preparatory processor, which is located upstream from the folder, for processing the sheets before folding the sheets; a presser for pressing the sheets stored in the stacker at a portion processed by the preparatory processor so as to push the sheets into the folder; and a controller for controlling the stacker, the feeder, the folder, the preparatory processor and the presser; wherein the controller controls the preparatory processor not to process a sheet that will be an outermost sheet of the folded set of sheets; wherein the preparatory processor is a perforator for making perforations in a sheet with a blade having teeth, the perforations extending in a direction perpendicular to a sheet traveling direction; and wherein the controller controls the folder to make a fold in the sheet that will be the outermost sheet of the folded set of sheets before other sheets, that will be part of the folded set of sheets, are stored in the stacker.