Sheet-material associating – Associating or disassociating – Signature associating
Patent
1986-12-30
1988-10-18
Eickholt, E. H.
Sheet-material associating
Associating or disassociating
Signature associating
270 58, B42B 102
Patent
active
047781670
ABSTRACT:
The caliper system in a booklet collating system automatically measures a new zero position before measuring the thickness of a following booklet or booklets to eliminate a zero-offset error otherwise occuring from build-up of ink contaminants on the caliper rollers. The caliper rollers are preferably cylindrical and completely round. A reference roller projects into a window in a skirt of the conveyor. A measuring roller engages the reference roller through the window and is carried on one end of a pivoted, lightweight arm that reduces the inertia required to be moved to effect the measurement. The free end of the arm is coupled by a string-pulley arrangement to a shaft encoder producing electrical position signals corresponding to the movement of the measuring roller caused by the thickness of a booklet between the caliper rollers. The position signals are received by a caliper controller that subtracts the zero position signal from each thickness signal received, usually ten for each book. The high and low differences are disregarded, the remaining eight thickness values are averaged and the controller determines whether the average thickness value represents a properly collated booklet. The controller then effect the binding of properly collated booklets and the rejection of improperly collated booklets.
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March, Jr. Edward
Raffl Richard
Snow James H.
Alden Press, Inc.
Bassuk Lawrence J.
Eickholt E. H.
Hattis Russell E.
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