US PATENT SUBCLASS 400 / 660
.~.~ Detachably secured to platen carriage

Current as of: June, 1999
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400 /   HD   TYPEWRITING MACHINES

648  DF  PLATEN OR PLATEN-MOVING MECHANISM {5}
659  DF  .~ Cylindrical platen {3}
660.~.~ Detachably secured to platen carriage {3}
660.1  DF  .~.~.~> By axially displaceable supporting shaft
660.2  DF  .~.~.~> By pivoted member overlying platen shaft
660.3  DF  .~.~.~> By disengageable platen sectors

DEFINITION

Classification: 400/660

Detachably secured to platen carriage:

(under subclass 659) Subject matter wherein a platen* is mounted on a carriage* for movement with the carriage by structure that enables the platen to be removed from and replaced on the carriage without disassembly of other parts of the typewriter.