Method and apparatus for aligning and feeding sheets for printin

Details Method and apparatus for aligning and feeding sheets for printin Method and apparatus for aligning and feeding sheets for printin

1985-10-18

1987-03-10

Reger, Duane A.

Sheet feeding or delivering

Feeding

With means to align sheet

271195, 271250, 271241, B65H 900

Patent

active

046485899

ABSTRACT:
A method and apparatus for aligning and feeding sheets for printing presses having a conveyor for supplying the sheets individually from a feed stack to the front and side lays in a feed table of the press. The method includes the steps of causing the sheets to strike the front lays, drawing the sheets against a side abutment of the side lay, engaging the sheets from below utilizing a vacuum device and then again pressing the sheets against the front lays.
The apparatus includes a vacuum device and front and side lays. The vacuum device includes suction arms disposed below the sheets and ahead of the front lays with respect to the direction of the sheet movement. The front lays are movable reciprocably in the direction of the sheet movement while the side lays are movable transversely to the direction of the sheet movement. The apparatus also includes: a first cam for pivoting the suction arms, a second cam for reciprocating the side lay, and a suction disc for controlling the negative pressure applied to the suction arms, all of which are secured to a single shaft and adjusted and laid out in an angular position to one another so that the sheet, after having been drawn laterally against the side lays, is again engaged by the suction arms and moved into a final position against the front lays.

REFERENCES:
patent: 3743277 (1973-07-01), Bolza-Schunemann et al.
patent: 4060237 (1977-11-01), Degen et al.
patent: 4184673 (1980-01-01), Weisbach
patent: 4260149 (1981-04-01), Melzer

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