Device for the formation of a stack of flat articles, especially

Details Device for the formation of a stack of flat articles, especially Device for the formation of a stack of flat articles, especially

1992-03-31

1993-07-06

Olszewski, Robert P.

Sheet feeding or delivering

Delivering

By endless conveyor

271215, 271 31, B65H 2950

Patent

active

052246973

ABSTRACT:
A device which forms a stack of flat articles such as envelopes is disclosed. A conveyor delivers flat articles to a movable carriage. The movable carriage includes a horizontal support and vertical support for aligning flat articles received. A stacking head supported on the movable carriage comprises four rotary rollers positioned at the vertices of a parallelogram. Two non-adjacent rollers are movable but maintained a fixed distance apart. The rollers support a belt which transfers received flat articles from the conveyor onto the horizontal and vertical supports. A strain-sensitive detector is coupled to the movable rollers for providing a signal to control carriage movement as the stack of accumulated flat articles increases.

REFERENCES:
patent: 3682473 (1972-08-01), Kutt
patent: 3729191 (1973-04-01), Yoshimura et al.

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