US PATENT SUBCLASS 83 / 806
.~.~.~ By screw-threaded means

Current as of: June, 1999
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83 /   HD   CUTTING

788  DF  BY ENDLESS BAND OR CHAIN KNIFE {10}
803  DF  .~ Including plural cutting zones {3}
804  DF  .~.~ With adjustment of separation between zones {2}
806.~.~.~ By screw-threaded means

DEFINITION

Classification: 83/806

(under subclass 804) Device wherein the space varying means is a member having a helical rib thereon that is mated with a second member so that relative rotation between the members varies the spacing between cutting spans.