Thermal head

Details Thermal head Thermal head

1990-05-17

1992-09-15

Hartary, Joseph W.

Recorders

Thermal recording

B41J 2325

Patent

active

051481880

ABSTRACT:
To the common electrode of the thermal head, the power source for heating and driving is connected to one end or both ends in the longitudinal direction of the common electrode. In this common electrode, as going from the connecting position of the power source for heating and driving, a voltage drop occurs, and the heat generation by the heating elements commonly connected to the common electrodes becomes uneven. Such uneven heat generation may lead to uneven contrast or defective coloring in the thermosensitive printing. The invention employs a conductive member which extends nearly over the entire length of the common electrode, and contacts with the common electrode over the entire length or at plural positions. As such conductive member, a metal foil or the like is used, and by inhibiting the occurrence of voltage drop, thermosensitive printing of high quality is realized.

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