Thermal head

Details Thermal head Thermal head

1997-08-25

1999-10-19

Tran, Huan

Incremental printing of symbolic information

Thermal marking apparatus or processes

Specific resistance recording element type

347200, B41J 2335

Patent

active

059697431

ABSTRACT:
A thermal head comprises a number of heating elements arranged on an electrically insulating substrate as a straight line and a plurality of driver ICs which are electrically connected to the heating elements so as to control generation of heat at the respective heating elements, wherein electric resistance values of the respective heating elements are within a range of .+-.1.8% with respect to a reference value, and the electric resistance values of the respective heating elements are distributed in the form of a meandering shape. A maximum value of the distribution of the electric resistance values of the heating elements is set at +0.5% to +1.8% with respect to the reference value and a minimum value of the distribution is set at -0.5% to -1.8% with respect to the reference value. In this manner, it is possible to eliminate inconsistencies in density of the plurality of heating elements connected to the driver ICs and print an image of excellent quality.

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