Abstract: A thermal printing head comprises a support member, a head circuit board supported on the support member, a connector board overlapped on the head circuit board, and a presser member for pressing the connector board against the head circuit board. The support member is flexible with a modulus of elasticity lying within a range of 1.times.10.sup.4 -5.times.10.sup.5 kg/mm.sup.2. The head circuit board carries a comb-like terminal portion arranged in a limited central portion which is substantially smaller in length than the head circuit board. The connector board also carries a comb-like terminal portion corresponding to the terminal portion of the head circuit board, and the length of the connector board is substantially smaller than that of the head circuit board.

Abstract: A method is provided for making unit heads from a material head. The unit heads are used to constitute a divisional-type thermal head. The material head includes an elongate insulating substrate carrying a longitudinal array of heating dot portions, and a protective layer extending longitudinally of the material head to cover the array of heat dot portions. According to the method, the material head is cut along at least one cutting line which extends transversely of the material head at a position between two adjacent heating dot portions, wherein the protective layer has cutouts which extend from the respective longitudinal edges of the protective layer toward the array of heating dot portions at the position of the cutting line.

Abstract: A thermal print head includes a head circuit board, a flattened flexible member partially overlapped on the head circuit board for electrical connection thereto in a limited region which is sufficiently smaller in length than the head circuit board, and a pressure applying member for pressing the flexible member into contact with the head circuit board in the limited region. The pressure applying member is in the form of a plate spring having a presser portion which is elastically deformed for pressing the flexible member into contact with the head circuit board in the limited region by elastic restoring force of the spring.

Abstract: A scanning head comprises a support member for supporting the head in pressing contact with a platen. The support member has lower strength portions spaced longitudinally of the head, and higher strength portions alternate with the lower strength portions. The support member is easily bendable at the lower strength portions, and the higher strength portions are urged by springs toward the platen. Thus, the head can come into intimate pressing contact with the platen even if the surface flatness of the support member as a whole is not strictly realized.

Abstract: A thermal print head comprises a head circuit board which is made of an insulating material, the heat circuit board carrying a heating resistor, a plurality of drive elements for heating the resistor, a plurality of connection terminals, and a wiring conductor pattern connecting the connection terminals to the drive elements. The wiring conductor pattern comprises a plurality of separate printed wirings, at least one of the wirings having at least one pair of separated ends which are connected by a raised wire, at least one of the other wirings being made to extend between the pair of separated ends.