US PATENT SUBCLASS 198 / 459.4
.~.~.~ Varying pitch

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

434  DF  CONVEYOR SYSTEM FOR ARRANGING OR REARRANGING STREAM(S) OF ITEMS {5}
459.1  DF  .~ By longitudinally respacing successive articles in stream {7}
459.3  DF  .~.~ Rotating screw {1}
459.4.~.~.~ Varying pitch

DEFINITION

Classification: 198/459.4

Varying pitch:

(under subclass 459.3) Subject matter wherein a distance between a point on one of the threads of the rotating screw and a corresponding point on an adjacent thread is different.