Thermal ink cassette for a thermal printing device

Details Thermal ink cassette for a thermal printing device Thermal ink cassette for a thermal printing device

B - Operations, Transporting

41

M

B41M 5/26 (2006.01) B41F 17/00 (2006.01) B41J 33/52 (2006.01)

Patent

CA 2164538

The thermal ribbon cassette is attachable to a thermal printing apparatus, the cassette housing is formed by a forward section attached to a rear wall to define a chamber. A supply spool is rotatively mounted to the forward section and the rear wall in the chamber. The supply spool has an ink transfer ribbon continuously wrapped there around and a number of interrupters continuously formed around the edge of the spool. A drag spring is mounted to the rear wall and biased against the interrupters for providing a rotational drag force. The take-up spool is rotatively mounted to the forward section and the rear wall in the chamber, the ink transfer ribbon has one end fixably mounted to the take-up spool and a portion extending through slots in the housing such that a portion of the ink transfer ribbon extends externally tosaid chamber. A locking gear arrangement is provided for preventing rotation of the take-up spool except in a forward direction.

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