Thermal ribbon cassette tension control for a thermal postage meter

Abstract From the Canadian patent

An improved thermal printing postage meter includes a base supporting a registration wall and a deck. A thermal print head is fixably mounted to the registration wall above a portion of the deck to define a print station. A thermal ribbon cassette is detachably mounted to the registration wall, the thermal ribbon cassette having a thermal transfer ribbon supply mounted around a supply roller and threaded past the print head in the printing station to a take-up roller. A platen roller assembly supports a platen roller for positioning the platen roller to assume a second position biasing the media against the thermal ribbon and the thermal print head. A first motor drive is provided for …