US PATENT SUBCLASS 493 / 364
.~.~ Engaging work on opposite sides

Current as of: June, 1999
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493 /   HD   MANUFACTURING CONTAINER OR TUBE FROM PAPER; OR OTHER MANUFACTURING FROM A SHEET OR WEB

340  DF  WITH CUTTING, BREAKING, TEARING, OR ABRADING {9}
363  DF  .~ Making plural, separate cuts by distinct cutting edges {2}
364.~.~ Engaging work on opposite sides {1}
365  DF  .~.~.~> Rotary cutter

DEFINITION

Classification: 493/364

Engaging work on opposite sides:

(under subclass 363) Method or apparatus including means for piercing a sheet or web workpiece on one planar surface and including means for piercing the opposing planar surface of that sheet or web.