RIBBON TAKEUP MECHANISM OF PRINTER CAPABLE OF PRINTING IN BOTH DIRECTIONS

摘要

PURPOSE:To provide the title device with two ribbon cassettes arranged in an opposite position to a printing block based on the operation of a shift means and a driving means which selectively transmits its drive power to each takeup shaft according to the moving direction of a carriage, thus enabling printing even during the shuttle movement of the carriage. CONSTITUTION:The ribbon cassettes 12, 13 equipped with a feeder spool and a takeup spool15 are laminated and supported so that the takeup direction of these ribbon cassette may be mutually reversed. Further, a shift means to move each ribbon cassette 12, 13 vertically so that the cassette may be alternatively arranged in an opposite position to a printing block 62 of a printing head 6 is provided with the installation of a drive means. In addition, a pair of takeup shafts 20, 31 are supported on the carriage 5 in a rotatable manner, and also a drive power transmission means to selectively transmit a power of the drive means to each takeup shaft 30, 31 is installed between each takeup shaft 30, 31 and the drive means according to the moving direction of the carriage 5.