US PATENT SUBCLASS 226 / 150
.~.~.~ By hydraulic or electrical means

Current as of: June, 1999
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226 /   HD   ADVANCING MATERIAL OF INDETERMINATE LENGTH

120  DF  BY INTERMITTENT (INTERRUPTED) MATERIAL-MOVER {13}
147  DF  .~ With retrograde movement preventer {3}
149  DF  .~.~ Positively actuated to grip {1}
150.~.~.~ By hydraulic or electrical means

DEFINITION

Classification: 226/150

(under subclass 149) Device wherein the preventing means is driven by means which derives its proximate actuating force from fluid-pressure or electricity.