| 摘要 |
A-620 02.03.1989 - 14 - Stb/Wi102039.ANM Device for sheet-length scanning in a sheet-processing machine, particularly in a sheet-fed rotary printing press The invention relates to a device for sheet-length scanning in a sheet-processing machine, particularly in a sheet-fed rotary printing press, in which a feeder aligns the sheets to be printed at stops for the front edges of the sheets and lifts the sheets off singly from a pile of sheets (1). The device consists of suctionair-measuring nozzles, which are aligned to the rear edges of the sheets and which, in their connection to a suction-air source, comprise switching elements (10, 11) in the circuit of the machine drive. The feature of the invention is the arrangement of such suction-air-measuring nozzles in the feeder and their alignment to the rear edge of the uppermost sheet (3) in the pile of sheets (1), with it being intended that the design features should allow simple retrofitting on existing machines. (Fig. 1)
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