Print head with electrode temperature control for resistive ribb

Details Print head with electrode temperature control for resistive ribb Print head with electrode temperature control for resistive ribb

1993-07-01

1995-05-30

Tran, Huan H.

Incremental printing of symbolic information

Thermal marking apparatus or processes

Specific resistance recording element type

B41J 2395

Patent

active

054206120

ABSTRACT:
A print head applies electrical energy to an electrically resistive and grounded transfer ribbon bearing heat transferable dye, during sliding pressure contact and relative movement between the head and ribbon, for resistive heating of the dye for transfer to a receiver to form images thereon. The head has a row of electrodes, an electrically non-conductive substrate and an electrically non-conductive and thermally insulating barrier layer in abutment, with the barrier layer between the electrodes and substrate. The barrier layer has a thermal conductivity at most about one-tenth of that of the substrate and a thickness sufficient to retard heat transfer from the electrodes to the substrate for controlling the temperature of the electrodes.

REFERENCES:
patent: 3553424 (1971-01-01), Spaulding
patent: 3862394 (1975-01-01), Lane, III
patent: 4170728 (1979-10-01), Flasck
patent: 4194108 (1980-03-01), Nakajima et al.
patent: 4350449 (1982-09-01), Countryman et al.
patent: 4484200 (1984-11-01), Tabata et al.
patent: 4684960 (1987-08-01), Nishiwaki et al.
patent: 4689639 (1987-08-01), Kimura et al.
patent: 4691210 (1987-09-01), Nishiguchi et al.
patent: 4703331 (1987-10-01), Stevens, Jr.
patent: 5317343 (1994-05-01), Brock et al.
IBM Technical Disclosure Bulletin, vol. 26, No. 10A, Mar. 1984, Fathergill et al., Flexible Electrode Printhead with Heat Sink.

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