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PLURAL INDEPENDENTLY OPERABLE MOTOR DRIVE ARRANGEMENT IN PRINTING PRESS

  • US 3,557,692 A
  • Filed: 09/09/1968
  • Issued: 01/26/1971
  • Est. Priority Date: 09/09/1968
  • Status: Expired due to Term
First Claim
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1. In a printing press having a plurality of successive cyclically-operated mechanisms:

  • a plurality of drive arrangements connected individually to the respective cyclically-operated mechanisms and each including a synchronous drive motor having a stator and a rotor and means coupling the rotor to the corresponding cyclically-operated mechanism for driving the latter, each motor stator having windings inductively coupled to the rotor and arranged to produce magnetic fields which revolve circumferentially about the rotor to cause the latter to rotate synchronously in response to AC energization of the stator windings;

    means for temporarily mechanically coupling said mechanisms so that they are synchronously driven as said motors are brought up to speed; and

    a like plurality of rotational positioning means, each individual to one of said drive motors and operable independently of said other rotational positioning means, once said temporary means are decoupled, for selectively changing the rotational position of its rotor with respect to the rotor of each other drive motor.

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