Electric heating – Heating devices – Combined with diverse-type art device
Patent
1988-09-06
1989-07-04
Pellinen, A. D.
Electric heating
Heating devices
Combined with diverse-type art device
219543, 346 76PH, 338308, G01D 1510
Patent
active
048453390
ABSTRACT:
A thermal head in which a glazed layer, an undercoat layer, an electric power supply conductor layer and a protection layer are successively laminated on the surface of an insulating substrate, wherein an insulating heat conductive layer with a good electrical insulating property and high heat conductivity is disposed just below the protection layer. The temperature distribution in the heat generating portion is made uniform to eliminate the heat generation dots destructed with the low electric power applied. In addition, the reliability of the thermal head can significantly be improved, as well as the unevenness in the printing can be eliminated.
REFERENCES:
patent: 4259564 (1981-03-01), Ohkuba et al.
patent: 4343986 (1982-08-01), Mitani et al.
patent: 4574292 (1986-03-01), Takikawa et al.
patent: 4595822 (1986-06-01), Nishiguchi et al.
patent: 4612433 (1986-09-01), Nagooka et al.
patent: 4617575 (1986-10-01), Fuyama et al.
Alps Electric Co. ,Ltd.
Gaffin Jeffrey A.
Heid David W.
Pellinen A. D.
Shoup Guy W.
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