US PATENT SUBCLASS 400 / 241.4
.~.~.~ Including ink-impervious backing for ribbon

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


400 /   HD   TYPEWRITING MACHINES

191  DF  INCLUDING INTERPOSED INKING DEVICE (E.G., RIBBON) FOR RECORD-MEDIUM {15}
237  DF  .~ Ribbon, per se {4}
241  DF  .~.~ Particular ribbon material {3}
241.4.~.~.~ Including ink-impervious backing for ribbon

DEFINITION

Classification: 400/241.4

Including ink-impervious backing for ribbon:

(under subclass 241) Subject matter wherein the ribbon* has first and second surfaces, the first surface contacting a record-medium* to imprint a character* by transferring ink* from the ribbon to the record-medium when the second surface is contacted by a type-face*, and wherein the second surface of the ribbon is formed of a substance through which ink is incapable of passing to preclude direct contact of the type-face with ink.