US PATENT SUBCLASS 400 / 547.1
.~.~.~ For arresting platen at limit of both retrograde and advance movement

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

545  DF  FOR LINE-SPACING BY INCREMENTAL ROTATION OF PLATEN {15}
546  DF  .~ To facilitate condensed billing (i.e., by determining a desired limit or amount of retrograde or advance platen movement) {2}
547  DF  .~.~ Including stop structure (e.g, traveling stop, etc.) {1}
547.1.~.~.~ For arresting platen at limit of both retrograde and advance movement {2}
547.2  DF  .~.~.~.~> By stop travelling in a rectilinear path
547.3  DF  .~.~.~.~> By lever or push-rod drive for platen {2}

DEFINITION

Classification: 400/547.1

For arresting platen at limit of both retrograde and advance movement:

(under subclass 547) Subject matter wherein the incremental rotation of the platen* in a direction that causes record-medium* movement in a line-space* direction is halted by contact of a movable and a stationary abutment, and wherein platen rotation in an opposite direction is also halted by contact of a movable and a stationary abutment.

(1) Note. Rotation of the platen in either direction may be stopped by the same or different abutments.