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A printing ribbon includes an electrically conducting ink that, when heated by electrical currents, migrates through adjacent ribbon layers to produce a mark on a receiving medium.
English (United States)
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Thermal Printing Ribbon
A printing ribbon includes an electrically conducting ink that, when heated by
electrical currents, migrates through adjacent ribbon layers to produce a mark on
a receiving medium.
Referring to the figure, a moderately conducting outer layer 10 of a ribbon 12
is composed of a resin loaded with carbon black and TEFLON*. An adjacent
highly conducting layer 14 serves to receive printing current applied at the outer
layer 10 by a set of printing electrodes 16 and an outer support layer 18 of a
plastic such as MYLAR* serves to add mechanical strength to the composite
ribbon 12. During printing, localized heating resulting from printing currents
applied at the electrodes 16 causes a portion of the moderately conducting layer
10, in the areas where heating occurs, to migrate through the highly conducting
layer 14 and the support layer 18 to produce marks on an adjacent receiving
medium 20, such as paper. * Trademark of E. I. du Pont de Nemours & Co.
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