Resistive printing ribbon having improved properties

Details Resistive printing ribbon having improved properties Resistive printing ribbon having improved properties

1985-10-31

1987-07-07

Hess, Bruce H.

Stock material or miscellaneous articles

Structurally defined web or sheet

Including components having same physical characteristic in...

219216, 400118, 400119, 400120, 400241, 4002411, 428209, 428212, 428323, 428333, 428409, 428412, 428421, 428422, 428469, 428484, 428688, 428696, 428913, 428914, B41M 526

Patent

active

046787011

ABSTRACT:
An improved resistive ribbon for resistive thermal transfer printing is described in which the resistive layer of the ribbon has enhanced thermal and mechanical properties. The ribbon is a multi-layer ribbon including a resistive layer, an electrical current return layer, and an ink layer. The resistive layer has an additive therein which phase separates and concentrates in a thin surface region near the interface of the resistive layer and the current return layer. This thin region has superior thermal and mechanical properties, and protects the remainder of the resistive layer during the printing operation, without adversely affecting the mechanical, electrical, and thermal properties of the overall resistive layer. These additives are those which will form a polymer having a sufficiently high dissociation temperature to withstand the adverse effects of heat build-up at the interface. Suitable additives include graphite fluorides, fluorocarbon resins such as Teflon.RTM., and CeF.sub.4.

REFERENCES:
patent: 4269892 (1981-05-01), Shattuck et al.
patent: 4309117 (1982-01-01), Chang et al.
patent: 4320170 (1982-03-01), Findlay
patent: 4459055 (1984-07-01), Asakura et al.

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