Sheet feeding or delivering – Feeding – Separators
Patent
1991-04-29
1992-03-03
Olszewski, Robert P.
Sheet feeding or delivering
Feeding
Separators
271 98, 271104, 271105, 271106, B65H 314
Patent
active
050925784
ABSTRACT:
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.
REFERENCES:
patent: 2085612 (1937-06-01), Spiess
patent: 3294396 (1966-12-01), Staines
patent: 3504910 (1970-04-01), Spyropoulos
patent: 3938800 (1976-02-01), Wirz
patent: 3980293 (1976-09-01), Shelmire
patent: 4470589 (1984-09-01), Singer
Bergmeier Dieter
Zeltner Jurgen
Greenberg Laurence A.
Heidelberger Druckmaschinen AG
Lerner Herbert L.
Milef Boris
Olszewski Robert P.
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