DEVICE AND METHOD OF MEDIUM STACK SHEET-FLUFFER, AND MEDIUM PROCESSING DEVICE ARRANGED THEREWITH

PROBLEM TO BE SOLVED: To provide a medium stack sheet-fluffer device for preventing a plurality of cut sheets from being fed together due to mutual adhesion of material when feeding the cut sheets at high speed. SOLUTION: A first fluffer aperture pattern includes two respective apertures 110, 120. In accordance with rotation of an aperture plate around an aperture plate shaft 106, the respective apertures are momentarily directed to a jet 60 of a fluffer to allow a plenum flow 200 to momentarily pass through the aperture (110 or 120) and to enter the jet 60 of the fluffer. As a result, a jet flow 300 of a momentary medium stack-fluffer is formed. Then, the jet 60 of the fluffer gives the jet flow 300 of the momentary medium stack-fluffer to one or more arbitrary medium stack side surfaces 5, 6, 7, 8 included in a medium stack 2, as well as an outer edge part of the medium stack, a surface, or the side surface 8. COPYRIGHT: (C)2010,JPO&INPIT