US PATENT SUBCLASS 400 / 227.1
.~.~.~ Ribbon destroyed after use


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

191  DF  INCLUDING INTERPOSED INKING DEVICE (E.G., RIBBON) FOR RECORD-MEDIUM {15}
223  DF  .~ Ribbon-feeding mechanism {13}
227  DF  .~.~ For narrow carbon ribbon (e.g., carbon ink, "single use", etc.) {2}
227.1.~.~.~ Ribbon destroyed after use


DEFINITION

Classification: 400/227.1

Ribbon destroyed after use:

(under subclass 227) Subject matter wherein provision is made for treating the ribbon* on the typewriter after the ribbon leaves the print-point* so as to render illegible any type-face* impressions on the ribbon or to make the ribbon useless for further typing.