Correction of transverse offset of sheets in sheet feeding unit

Details Correction of transverse offset of sheets in sheet feeding unit Correction of transverse offset of sheets in sheet feeding unit

1978-03-16

1981-01-20

Schacher, Richard A.

Sheet feeding or delivering

Feeding

Pack holders

B65H 122

Patent

active

042458307

ABSTRACT:
A sheet feeding unit includes a stack elevator which raises the top of a supported stack of sheets to infeed height. A sensor senses the position of the top sheets of the stack, to ascertain whether these exhibit improper left or right offset. Depending upon the magnitude and size of the sensed offset, the stack elevator is correctively shifted, to minimize offset at the top of the stack. Although the sensor is located to only one side of the stack, not at both sides of the stack, it is capable of sensing offset in both left and right directions. When the elevator is lowered, for the laying in of a fresh stack, it is automatically brought to a centered position.

REFERENCES:
patent: 1948001 (1934-02-01), Mensman
patent: 2636692 (1953-04-01), Picking
patent: 3504835 (1970-04-01), Callan

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