SERIAL PRINTER

PURPOSE:To provide clear print by employing a moving guide having side bars which define spacing longer than the carriage of a print head but shorter than the travel of the head and enclose the opposite sides of the carriage. CONSTITUTION:In printing on a recording medium 8 in a predetermined position, a print head moves from the home position to the right, and the medium is firmly pressed against the platen by the head 6 and a side bar 11a so that clear printing is possible. The gap between side bars 11a and 11b of a moving guide 11 is wider than a carriage 5. Therefore, the guide 11 does not follow the movement of the head 6 in the beginning, and the side bar 11a keeps pressing the recording medium 8. On the other hand, the gap between the side bars 11a and 11b is shorter than the travel of the head. When the right-hand edge of the carriage 5 presses the inner face of the side bar 11a, the moving guide 11 follows the carriage.