| 摘要 |
<p>A thermal printing head comprising a plurality of thin insulating layers each being provided on one surface thereof with a plurality of electrically conductive slips 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 slip of an electrically resistive material extends transversely of and in contact with the exposed end portions of the conductive slips on each of said insulating layers, so that between each adjacent two of the conductive slips on all the insulating layers there are defined a plurality of dot-like portions of the resistive slips which are arranged in rows and columns on the printing surface of the head. Upon impression of a voltage between adjacent pairs of the conductive slips those defined portions of the resistive slips which are between the adjacent pairs of conductive slips are heated, and by selecting the pairs of conductive slips between which a voltage is to be applied it is possible to cause the heated defined dot-like portions of the resistive slips to take the shape of a symbol, so that when a sheet of heat-sensitive paper is pressed against the heated portions, the symbol is printed on the paper.</p> |
