Thermal line printer with carriage roller contacting the platen

摘要

A thermal line printer in which characters or image data are printed on a recording paper using a thermal line head having an array of heat generating resistors is provided. A platen roller opposed to the thermal line head presses the recording paper between the platen roller and the thermal line head. A carriage roller which is provided in close proximity to the thermal line head. A drive motor rotates the carriage roller. A spring biases the platen roller with respect to the thermal line head and the carriage roller. The recording paper is pressed at a predetermined pressure between the platen roller and the thermal line head. The recording paper is fed to pass through a passageway defined between the thermal line head and the platen roller in accordance with the rotation of the carriage roller.