US PATENT SUBCLASS 400 / 223
.~ Ribbon-feeding mechanism


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.~ Ribbon-feeding mechanism {13}
224  DF  .~.~> For feeding ribbon angularly to print-line at print-point {1}
225  DF  .~.~> Including electrically powered drive means (e.g., solenoid, stepping motor, etc.)
226  DF  .~.~> For feeding ribbon partial character-space before impact and partial character-space after impact
227  DF  .~.~> For narrow carbon ribbon (e.g., carbon ink, "single use", etc.) {2}
228  DF  .~.~> Including pin-feed-engaging ribbon
229  DF  .~.~> Mounted with movable type-face-carrier or type-head-carrier
230  DF  .~.~> With fast rewind of ribbon
231  DF  .~.~> With prevention of ribbon feed (e.g., for nontype operation, etc.)
232  DF  .~.~> Including feed at particular feed rate (e.g., "creep" feed)
233  DF  .~.~> Ribbon feed from supply only during carriage return
234  DF  .~.~> Including ribbon tensioner
235  DF  .~.~> Drive applied by means directly engaging ribbon in advance of takeup {1}
236  DF  .~.~> Drive applied directly to spool or spool spindle {2}


DEFINITION

Classification: 400/223

Ribbon-feeding mechanism:

(under subclass 191) Subject matter wherein the transfer-medium* is a ribbon* and significance is attributed to a manner of moving the ribbon relative to a print-point* in a direction parallel to the longitudinal extent of the

ribbon as character* symbols are imprinted on a record-medium* or to the manner of regulating such ribbon movement.

SEE OR SEARCH THIS CLASS, SUBCLASS:

36, for ribbon feed in a flat-platen typewriter.

218, for ribbon reversing wherein ribbon feeding is disclosed.