| 摘要 |
A sheet feeder in a sheet-processing machine, comprising first blower nozzles for fanning and separating a top sheet of a sheet pile, the blower nozzles being directed at least at a rear edge of the top sheet in the sheet pile, a separating device for lifting the top sheet from the sheet pile, second blower nozzles for blowing supporting air under the top sheet in synchronism with an operating cycle of the sheet feeder, central blast-air supply system for the sheet feeder being connected to the first blower nozzles, and a blast-air source separate from the central blast-air supply system connected via a control valve to the second blower nozzles for supplying blast air thereto for supporting the sheet, and a device for operating the control valve in synchronism with the separating device.
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