US PATENT SUBCLASS 400 / 548
.~.~ With graduated scale (e.g., on drum periphery)

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}
548.~.~ With graduated scale (e.g., on drum periphery)

DEFINITION

Classification: 400/548

With graduated scale (e.g., on drum periphery):

(under subclass 546) Subject matter wherein the typewriter is provided with a device that facilitates the positioning of the condensed-billing* record-medium*, which device includes a measuring instrument calibrated in units that indicate the extent to which the platen* should be rotated in either direction of its rotation to correspond to the desired location of said record-medium.

(1) Note. The measuring instrument (i.e., scale) may be on the circumference of a circular member or drum.