Device for the smooth and flutter-free feeding of sheets on shee

Details Device for the smooth and flutter-free feeding of sheets on shee Device for the smooth and flutter-free feeding of sheets on shee

1976-11-09

1977-11-29

Stoner, Jr., Bruce H.

Sheet feeding or delivering

Feeding

By means to convey sheet

101420, 101422, 271 80, 271195, B65H 522

Patent

active

040602389

ABSTRACT:
A feed drum assembly for feeding sheets in succession to the impression cylinder of a lithographic printing press which includes a cylindrical mantle having an axially and circumferentially distributed array of spacers which are spaced radially outward from the surface of the mantle at a constant spacing to define a support for the sheet as it makes a partial turn about the drum. An axially extensive nozzle directs air at high velocity in a direction chordwise of the drum and into the region between the sheet and the mantle. The change in direction of the air as it strikes and tends to follow the curved surface of the mantle creates an inward suction upon the sheet to draw the sheet against the spacers and thereby prevent fluttering as the sheet is transported at high speed. In the preferred embodiment of the invention the spacers are in the form of small, individually rotatable rollers smoothly surfaces with ink repellent synthetic material.

REFERENCES:
patent: 3341195 (1967-09-01), Brandt et al.
patent: 3602140 (1971-08-01), Sudduth
patent: 3642274 (1972-02-01), Herrington et al.
patent: 3780925 (1973-12-01), Ternes
patent: 3791644 (1974-02-01), DeMoore
patent: 3986455 (1976-10-01), Jeschke et al.

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