System for controlling sheet feed in sheet-processing machines,

Details System for controlling sheet feed in sheet-processing machines, System for controlling sheet feed in sheet-processing machines,

1991-01-17

1992-03-17

Schacher, Richard A.

Sheet feeding or delivering

Feeding

With means to align sheet

271261, B65H 708

Patent

active

050961837

ABSTRACT:
A system for controlling sheet feed in a sheet-processing machine having a feed table with front stops thereon includes a scanning device in the vicinity of the front stops for detecting an arrival of a sheet thereat. An angle sensor is attached to a shaft of the sheet-processing machine. A computing/control device has a device for assigning scanning signals from the scanning means to respective angular positions .phi.actual with stored setpoint values .phi.setpoint, for computing positioning data for correcting a subsequent arrival of a sheet, if there is a deviation .DELTA..phi. between angular positions .phi.actual and the stored setpoint values .phi.setpoint, and for transmitting the positioning data to an actuating device.

REFERENCES:
patent: 4892426 (1990-01-01), Steele
patent: 5021676 (1991-06-01), Dragon

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