Willian Brinks Hofer Gilson & Lione
Sheet sorter with hole punching assembly
 A sorter with a plurality of sheet containing bins. The sorter has a first roller and a second roller for transporting a sheet received from a copying machine, and a punching mechanism for punching a sheet is provided immediately after the first roller. Power transmission to the second roller can be connected and disconnected. Immediately before the trailing edge of a sheet passes through the first roller, rotation of the second roller is stopped. Thereby, the trailing portion of the sheet makes a curve, the curve in the sheet caused by buckling of the sheet as the first roller holds the sheet against any further downstream movement, and the trailing edge is regulated by the first roller. In this moment, the punching mechanism is driven to punch the sheet. 
Minolta Co., Ltd.
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Tatsuya Hiroki
Shinno Yamashita