Sheet feeding or delivering – Feeding – Separator and conveyor
Patent
1988-02-25
1989-12-12
Rolla, Joseph J.
Sheet feeding or delivering
Feeding
Separator and conveyor
271 15, 271 98, 271105, 271147, 271250, B65H 508, B65H 308, B65H 346
Patent
active
048862614
ABSTRACT:
Sheet feeder for a printing machine includes a receiving device adjustable in height for taking up a pile formed of individual sheets, a front stop for leading edges of the sheets, and at least one side stop for the side edges of the sheets at one side of the pile; alignment elements located at least at an upper end of the pile and exerting alignment forces on the pile towards the front and the side stops; a loosening device for neutralizing, at least partly, adherence of the upper sheets to one another; a conveying device for withdrawing the respective uppermost sheet from the pile and feeding it into the printing machine; and an additional sheet alignment device acting upon the surface of the respective uppermost sheet, at least until it is taken over by the conveying device, in a way that the alignment device exerts alignment forces upon the sheet towards at least one of the stops; the additional sheet alignment device being offset with respect to the conveying device towards respective trailing edges of the sheets.
REFERENCES:
patent: 2233935 (1941-03-01), Backhouse
patent: 3022997 (1962-02-01), Pendley
patent: 3695606 (1972-10-01), Wirz
patent: 3809389 (1974-05-01), Wirz
patent: 3938800 (1976-02-01), Wirz
patent: 4470589 (1984-09-01), Singer
patent: 4568073 (1986-02-01), VanHorne
Greenberg Laurence A.
Heidelberger Druckmaschinen AG
Lerner Herbert L.
Reiss Steven M.
Rolla Joseph J.
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