Thermal print head

Details Thermal print head Thermal print head

1985-10-24

1987-01-13

Evans, Arthur G.

Recorders

Thermal recording

219543, 338306, 400120, G01D 1510

Patent

active

046368116

ABSTRACT:
A thermal print head comprising a laminated structure having a dielectric sheet containing a plurality of electrodes having ends terminating along a common edge, and a conductive ground sheet disposed on the opposite side of the dielectric sheet from the electrodes and also terminating at the common edge. A resistive material is provided along the common edge in contact with the ground plane and electrodes. When power is applied to a selected electrode, a conductive path is established from the electrode through a portion of the resistive material and into the ground plane to complete an electrical circuit for heating the activated portion of resistive material which serves as a printing element for marking of thermal paper confronting the common edge of the print head. In an alternative embodiment, multiple rows of electrode ends can be grouped opposite to respective ground planes and can be energized in a multiplex addressing mode.

REFERENCES:
patent: 4399348 (1983-08-01), Bakewell
patent: 4415403 (1983-11-01), Bakewell
"Universal Printhead" by Kuntzleman et al, IBM Tech. Disclosure Bulletin, vol. 25, No. 4, Sept. 1984, pp. 2117-2119.

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