Sheet feeding or delivering – Feeding – Separators
Patent
1990-03-05
1991-08-06
Skaggs, H. Grant
Sheet feeding or delivering
Feeding
Separators
271108, 271 98, 271227, B65H 308
Patent
active
050370804
ABSTRACT:
A device for scanning the length of a sheet in a sheet-processing machine including suction-air measuring nozzles alignable with the trailing edge of the sheet and connected to a suction-air source via control elements connected in an electrical circuit of the machine drive, and a feeder for aligning the sheets to be processed at stops for the leading edge of the sheet, and for lifting sheets individually off a pile of sheets includes a fall-type sucker formed of at least one of the suction-air measuring nozzles, the fall-type sucker being formed with a scanning bore directed in the feeder towards the trailing edge of the uppermost sheet in the pile of sheets, and a differential-pressure-measuring valve disposed in a suction-air line connected to the fall-type sucker, said differential-pressure measuring valve being cooperatively associated with the control elements.
REFERENCES:
patent: 3294396 (1966-12-01), Staines
patent: 3938800 (1976-02-01), Wirz
patent: 4184672 (1980-01-01), Watkins
Greenberg Laurence A.
Heidelberger Druckmaschinen AG
Lerner Herbert L.
Skaggs H. Grant
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