Print head with pixel size control for resistive ribbon thermal

Details Print head with pixel size control for resistive ribbon thermal Print head with pixel size control for resistive ribbon thermal

1993-07-01

1995-06-20

Tran, Huan H.

Incremental printing of symbolic information

Thermal marking apparatus or processes

Electroconductive recording means

347208, B41J 2395, B41J 239

Patent

active

054264510

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 to a transfer temperature for transfer to a receiver to form images of selective pixel size thereon. The head has a row of electrodes with end faces and an electrically non-conductive substrate with an end face, the end faces lying in a contact plane for contact with the ribbon. A groove in the substrate end face separates such end face from the electrode end faces. The width of the groove is sufficient to inhibit heat transfer at the groove from the ribbon to the substrate for controlling the dye amount heated to transfer temperature adjacent the groove during the relative movement and in turn the image pixel size.

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.
IBM Technical Disclosure Bulletin, vol. 26, No. 10A, Mar. 1984, Fathergill et al., Flexible Electrode Printhead With Heat Sink.

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