End-contact type thermal recording head having heat-generating p

Details End-contact type thermal recording head having heat-generating p End-contact type thermal recording head having heat-generating p

1997-04-21

1999-06-01

Tran, Huan

Incremental printing of symbolic information

Thermal marking apparatus or processes

Specific resistance recording element type

B41J 2335

Patent

active

059092343

ABSTRACT:
A thermal recording head having an electrically resistive heat-generating portion formed on a thin-walled end portion of a ceramic substrate and electrically connected to recording and return-circuit electrodes. A reinforcing or heat radiating member is disposed on at least one of opposite sides of the substrate such that a portion of the reinforcing or heat radiating member is located at the thin-walled end portion of the substrate. The thin-walled end portion is preferably partially defined by a shoulder surface which extends from one of opposite major surface of the substrate and terminates in the end face of the thin-walled end portion. The substrate preferably has a thermal conductivity within a range between 0.002 cal.multidot.cm/sec.multidot.cm.sup.2 .multidot..degree.C. and 0.03 cal.multidot.cm/sec.multidot.cm.sup.2 .multidot..degree.C., while the heat radiating member preferably has a thermal conductivity higher than 0.01 cal.multidot.cm/sec.multidot.cm.sup.2 .multidot..degree.C. The conductivity of the substrate is preferably lower than that of the heat radiating member.

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