| 摘要 |
A thermal printing head which comprises a block of an insulating material and a thermal printing multi-symbol unit provided on that surface of the block which is brought into contact with a sheet of thermally-sensitive recording paper or the like. The unit comprises a plurality of resistive elements each comprising a plurality of linear portions and so arranged that selective combination of the elements or portions thereof produces different symbols to be printed. A common lead connects one end of each of the resistive element linear portion to one terminal of a source of energy while different leads selectively connect the opposite ends of the linear portions to the opposite end of the source to effect selective heating of the linear portions to provide a desired symbol.
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