US PATENT SUBCLASS 400 / 661.3
.~.~.~ Including cylindrical sections or rings (e.g., of character-space width)

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

648  DF  PLATEN OR PLATEN-MOVING MECHANISM {5}
659  DF  .~ Cylindrical platen {3}
661  DF  .~.~ With sound-muffling means {4}
661.3.~.~.~ Including cylindrical sections or rings (e.g., of character-space width)

DEFINITION

Classification: 400/661.3

Including cylindrical sections or rings (e.g., of character-space width):

(under subclass 661) Subject matter wherein the platen* is formed of a plurality of annular elements each having a circular dimension equal to the diameter of the platen cylinder and a width dimension extending axially of the platen.

(1) Note. In some typewriters each of the annular elements may have a width dimension equal to the width of a character*.