Sheet sensing device in a rotary printing press

Details Sheet sensing device in a rotary printing press Sheet sensing device in a rotary printing press

B - Operations, Transporting

41

F

116/67.5

B41F 21/00 (2006.01) B41F 21/10 (2006.01) B41F 33/14 (2006.01) B65H 9/20 (2006.01)

Patent

CA 1080557

Abstract of the Disclosure The specification describes a sheet sensing device for use in a rotary printing press, preferably of the perfecting type. The device includes a plurality of sheet delivery drums equipped with grippers to grip the front edge of the sheets, as well as grippers to grip the back edge of the sheet. The area of the grippers which grip the back edge of the sheets is provided with sensing nozzles which are connected to a generator operated under pneumatic pressure via a feeder system. The feeder system includes a pressure guard between the pressure generator and the sensing nozzles.

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