US PATENT SUBCLASS 40 / 522
.~.~ Reversing gear

Current as of: June, 1999
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40 /   HD   CARD, PICTURE, OR SIGN EXHIBITING

446  DF  CHANGING EXHIBITOR {25}
518  DF  .~ Double reel and web {3}
522.~.~ Reversing gear {1}
523  DF  .~.~.~> Clutch take-up

DEFINITION

Classification: 40/522

Reversing gear:

(under subclass 518) Device wherein said rollers are operated in opposite directions by means of gear-shifting devices.