US PATENT SUBCLASS 400 / 218
.~ Ribbon-reversing mechanism

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

191  DF  INCLUDING INTERPOSED INKING DEVICE (E.G., RIBBON) FOR RECORD-MEDIUM {15}
218.~ Ribbon-reversing mechanism {4}
219  DF  .~.~> Including means responsive to depletion of ribbon supply {4}
220  DF  .~.~> Alternative pawl-and-ratchet drive including ratchet directly connected to spool or spindle {2}
221  DF  .~.~> Alternative gear drive including gear directly connected to spool or spindle {2}
222  DF  .~.~> Alternative clutch drive including clutch member directly connected to spool or spindle

DEFINITION

Classification: 400/218

Ribbon-reversing mechanism:

(under subclass 191) Subject matter wherein the transfer-medium* is a ribbon* and the provision is made for moving the ribbon relative to a print-point* in a first direction as character* symbols are imprinted on a record-medium* during typing, and wherein significance is attributed to a manner of causing the ribbon to move relative to the print-point in a direction opposite to said first direction for further typing of characters on the

record-medium using the same ribbon.