Patent attributes
A thermal print head (A1) has main heat producing resistor sections (31) formed on a substrate (1) and arranged in the main scan direction (X) at predetermined intervals; auxiliary heat producing resistor sections (32) provided with a predetermined gap in the auxiliary scan direction (Y) relative to the main heat producing resistor sections (31); first electrodes (43) for individually connecting in series, out of the main heat producing resistor sections (31) and the auxiliary heat producing resistor sections (32), at least main heat producing resistor sections (31) and auxiliary heat producing resistor sections (32) arranged in the auxiliary scan direction (Y); and second electrodes (41, 42) for conducting electricity to the series circuits composed of the main heat producing resistor sections (31) and the auxiliary heat producing resistor sections (32) connected in series by the first electrodes(43). The distance (D2) in the auxiliary scan direction (Y) between each main heat producing resistor section (31) and each auxiliary heat producing resistor section (32) is greater than the length (L1) in the auxiliary scan direction (Y) of each main heat producing resistor section (31).
