Typewriting machines – Typing by other than type-face or type-die – Thermal
Patent
1991-06-07
1992-10-06
Fisher, J. Reed
Typewriting machines
Typing by other than type-face or type-die
Thermal
400641, 400662, B41J 232, B41J 200
Patent
active
051526182
ABSTRACT:
A printing mechanism such as a thermal printer includes a rotatable cylindrical platen having a circumference which is smaller than the printing length of a complete image to be reproduced on a print medium, and at least one pinch roller. The platen has a width which is wider than a width of the print medium. The platen includes a rigid central longitudinally-disposed shaft, a cylindrical elastomeric layer formed around a central logitudinal section of the shaft, and first and second opposing cyclindrical registration members. The first and second registration members are fixedly coupled to the shaft and engage a first and a second end of the elastomeric layer, respectively, so that the shaft, layer, and members rotate together. Each pinch roller is formed of a rigid material and is disposed longitudinally to the platen. Each pinch roller is forced radially towards the platen by a suitable forcing means to engage (a) the registration members in the absence of a print medium between the pinch roller and the elastomeric layer, and (b) just engage the surface of the print medium opposite the elastomeric layer during a printing process.
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Goodwin William D.
Stephenson Stanley W.
Eastman Kodak Company
Fisher J. Reed
Nguyen Anthony H.
Owens Raymond L.
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