US PATENT SUBCLASS 198 / 781.01
.~.~ Live roll drive engages, disengages, or slips responsive to load position or blockage

Current as of: June, 1999
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198 /   HD   CONVEYORS: POWER-DRIVEN

618  DF  CONVEYOR SECTION {26}
780  DF  .~ Live roll {9}
781.01.~.~ Live roll drive engages, disengages, or slips responsive to load position or blockage {2}
781.02  DF  .~.~.~> Friction drive slips or disengages {2}
781.05  DF  .~.~.~> Live roll is driven by load sensor (e.g., trigger roller) {6}

DEFINITION

Classification: 198/781.01

Live roll drive engages, disengages, or slips responsive to load position or blockage:

(under subclass 780) Subject matter having a means to bring a cylindrical motion transmitting device and the load conveying device in contact with each other or out of contact with each other or to permit abnormal movement to take place between the cylindrical motion transmitting device and the load conveying device in response to (a) a sensor detecting the presence or absence of the load at a predetermined position on the conveyor or (b) a device responsive to excessive load on the conveyor.