Printing – Rolling contact machines – Rotary
Patent
1978-11-07
1980-09-02
Eickholt, Eugene H.
Printing
Rolling contact machines
Rotary
324166, 324172, 324165, 235926A, 235 92FQ, 101248, B41F 1324
Patent
active
042200849
ABSTRACT:
As documents are moved serially past a servo motor-driven endorser, it endorses a stamp upon each. A transport signal dependent on document speed, and an endorser signal generated by an optical tachometer mounted to the servo motor, provide input to a frequency comparator. The output of the comparator is a control signal which controls the servo motor speed to adjust the endorser rotational surface velocity to equalization with the document speed. Logic circuitry sets the endorser at a zero angular position. Responsive to an endorse command, the endorser is accelerated to document speed, receives ink from a supply roller, then endorses the passing document. A counter and a digital comparator in cooperation with the tachometer signal completion of the endorsement whereupon the endorser is decelerated and placed in the zero position. Should a succeeding endorse command occur prior to complete deceleration, acceleration is resumed after a delay count given by a PROM and based upon the pulse count when the succeeding endorse command is received.
REFERENCES:
patent: 3335661 (1967-08-01), Moschetti et al.
patent: 3537393 (1970-11-01), Hegi
patent: 3641313 (1972-02-01), Watson
patent: 3934505 (1976-01-01), Kushner
patent: 3944923 (1976-03-01), Luteran
patent: 4021681 (1977-05-01), Miesterfeld
patent: 4023489 (1977-05-01), Beery
patent: 4031466 (1977-06-01), Krause et al.
patent: 4074196 (1978-02-01), Webster
patent: 4093056 (1978-06-01), Burgers
patent: 4133262 (1979-01-01), Beery
"Verifying Tachometer Operation", IBM Technical Discl. Bulletin, vol. 14, No. 3, Aug. 1971, pp. 683-684.
Maclean George
Milanes Eddy J.
Pexton Harold W.
Eickholt Eugene H.
Magnetic Peripherals Inc.
Niebuhr Frederick W.
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