Printed sheet monitoring assembly

Details Printed sheet monitoring assembly Printed sheet monitoring assembly

1992-08-10

1994-07-19

Burr, Edgar S.

Printing

Rolling contact machines

Rotary

271 90, B41F 1324

Patent

active

053298527

ABSTRACT:
A printed sheet monitoring assembly utilizes a suction box with a planar lower suction surface to hold a printed sheet to be monitored in a crease-free manner. An area array image sensor is positioned beneath the suction box and is actuated by a trigger device to scan the printed sheet. The sheet grippers on an endless conveying chain are arranged on the chain to be in vertical alignment during scanning of the printed sheet.

REFERENCES:
patent: 3730514 (1973-05-01), Burkhardt
patent: 4127263 (1978-11-01), Wenthe
patent: 4357007 (1982-11-01), Mens Franciscus et al.
patent: 5029525 (1991-07-01), Jeschke
patent: 5052675 (1991-10-01), Shehata et al.

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