Patent ID: 8186662
Filing Date: 2012-05-29
Classification: B65H

Abstract:
1. A sheet monitor for a folding machine, comprising: a plurality of pairs of conveying belts, the pairs provided at intervals in a direction perpendicular to a conveying direction of a sheet and conveying the sheet while holding the sheet therebetween; a plurality of stoppers being provided between the plurality of pairs of conveying belts and stopping the sheet conveyed by the plurality of pairs of conveying belts by coming into contact with the sheet; a chopper blade folding the sheet stopped by the stoppers in a direction parallel to the conveying direction of the sheet; a pair of imaging means taking images respectively of a range where a conveying direction leading edge of one side edge parallel to the conveying direction of the sheet is decelerated or stopped by coming into contact with the stoppers, and a range where a conveying direction leading edge of the other side edge parallel to the conveying direction of the sheet is decelerated or stopped by coming into contact with the stoppers; and a control unit that controls the pair of imaging means, wherein the control unit controls the pair of imaging means to take images once for each rotation of the folding machine, and wherein the control unit controls each of the pair of imaging means to take every image at a folding machine rotation phase different from that of the image immediately before taken.