Importance

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Abstract

A coding and marking printer system having an unwind reel coupled to a rotatable drag pulley to supply ribbon from a depletable ribbon supply roll disposed thereon to a first guide roller, to a dancer guide roller on a pivotal dancer arm, and then to a rewind reel. A drag belt disposed partially about the drag pulley has first and second ends coupled to the dancer arm, which is pivotal about its axis to control tension on the drag belt as ribbon is supplied from the unwind reel, whereby drag on the unwind reel increases as the ribbon supply roll decreases in size to maintain relatively constant drag on the ribbon. A heated rotatable typeholder is actuatably disposed in an insulated heater block to reduce heat radiation therefrom, particularly when the heater block is oriented with the typeholder directed upwardly. The printer system includes a cassette assembly removably mountable onto a main plate assembly having an alignment member disposeable in an aperture of the cassette assembly for accurate alignment and spacing therebetween. A latch assembly lockingly retains the cassette assembly on the main plate assembly.

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First Claim