High Speed Ribbon Mechanism With Ribbon Lift Control
Original Publication Date: 1981-Mar-01
Included in the Prior Art Database: 2005-Feb-11
In impact typewriters, print line visibility must be provided to the typist. Consequently, the carbon ribbon is usually kept out of visibility obstructing position and therefore out of print position except at impact time when the typefont impacts a selected character onto the record medium (paper). Therefore, during the normal typing of a line of characters, the carbon ribbon is made to oscillate up and down in front of the platen. Also, efficient use of the carbon ribbon throughout its width implies ribbon oscillations at various amplitudes. The system proposed here enables performing controlled carbon ribbon oscillations.