Typewriting machines – Typing by other than type-face or type-die – Thermal
Patent
1984-08-10
1985-12-17
Wright, Jr., Ernest T.
Typewriting machines
Typing by other than type-face or type-die
Thermal
400225, 400227, 400229, 400232, 4002351, B41J 320
Patent
active
045589631
ABSTRACT:
Conservation of ribbon 40 is achieved by underfeeding ribbon 40 relative to movement of thermal printhead 16. Pressure of printhead 16 may be low enough that smearing from a typical ribbon 40 does not occur. Gears 208, 210, 212, 214 and 216 may be positioned in one of two settings by action of bellcrank 230. One position provides a 1.04 to 1 underfeed ratio and the other provides a 5 to 1 underfeed ratio. Control 232 lowers print current for the 5 to 1 ratio. A printer having a single ratio of 1.04 to 1 provides printing of unimpaired quality with significant saving of ribbon.
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Applegate Steven L.
Molloy James J.
Wilbur Clayton V.
Brady John A.
International Business Machines - Corporation
Wright, Jr. Ernest T.
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