US PATENT SUBCLASS 400 / 305
.~.~ By force-feed or screw-feed mechanism

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

283  DF  CARRIAGE OR CARRIAGE-MOVING OR MOVEMENT-REGULATING MECHANISM {11}
303  DF  .~ For varying carriage feed {3}
305.~.~ By force-feed or screw-feed mechanism

DEFINITION

Classification: 400/305

By force-feed or screw-feed mechanism:

(under subclass 303) Subject matter wherein the carriage* is caused to be moved in a carriage-feed (i.e., character-space*) direction through irregular increments by a mechanism that positively engages the carriage or a portion affixed thereto and that positively moves in a direction to thereby move the carriage therewith in said direction, or

wherein the carriage is caused to be moved by the rotation of a helically threaded member.

SEE OR SEARCH THIS CLASS, SUBCLASS:

328, for force-feed mechanism in an equal increment carriage feed.