US PATENT SUBCLASS 198 / 467.1
.~ System includes a rotating screw

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198 /   HD   CONVEYORS: POWER-DRIVEN

463.1  DF  CONVEYOR SYSTEM FOR MOVING A SPECIFIC LOAD AS A SEPARATE UNIT {9}
467.1.~ System includes a rotating screw

DEFINITION

Classification: 198/467.1

System includes a rotating screw:

(under subclass 463.1) Apparatus wherein one of the conveyor sections includes a member which turns about its axis and has a helical surface which is shaped to extend radially of and simultaneously advance longitudinally of said axis whereby the turning member engages the load and advance it parallel to the axis.