| 摘要 |
A thermal printing head comprising a plurality of thin insulating layers each being provided on one surface thereof with a plurality of lower slips made of an electrically conductive material arranged in spaced parallel relation to one another. The insulating layers are piled stepwise one upon another so that one end portion of the upper surface of each of the layers with the corresponding end portions of the conductive slips thereon are exposed from beneath the end of the layer immediately above. A square element made of an electrically resistive material is placed on each of the exposed end portions of the lower conductive slips. An upper slip made of an electrically conductive material extending transversely of the exposed ends of the lower conductive slips on each of the insulating layers covers the resistive elements so that the elements are sandwiched between the upper and lower conductive slips. Upon impression of a voltage between the upper and lower conductive slips, the resistive elements sandwiched therebetween are heated. By selecting the lower conductive slips between which and the upper conductive slip a voltage is to be impressed it is possible to heat those of the resistive elements which are combined to take the shape of a symbol, and with a sheet of heat-sensitive paper being applied onto the surface of the printing head, the symbol is printed on the paper.
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