Multi-color thermal printer having means for efficiently positioning the drum and inked film simultaneously

摘要

A transmission device is provided for transmitting an output of a drum motor to a drum on which a sheet of paper is mounted, for driving the drum. The transmission device has a plurality of pulleys and a timing belt. Each of the pulleys has a plurality of grooves to be engaged with projections of the timing belt. The number of the grooves is determined to times of an integer number.