03939957 is referenced by 19 patents and cites 13 patents.

A printer arrangement of the type which prints data serially along a line on a record medium by relative impact of type characters and record medium through a ribbon. Printing is a mixture of stop and go printing, essentially a character at a time, and continuous printing of a plurality of characters. Driving power for the ribbon is derived from carriage movement on which the print head is mounted through controllable clutch and toggle switch action. The toggle switch action reverses ribbon drive direction in response to a depletion of ribbon signal.

Title
Carriage operated ribbon drive and reverse mechanism
Application Number
5/423734
Publication Number
3939957
Application Date
December 11, 1973
Publication Date
February 24, 1976
Inventor
John R Bittner
Waynesboro
VA, US
Agent
Michael Masnik
Assignee
General Electric Company
VA, US
IPC
B41J 33/14
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