Ink ribbon cassette and apparatus that uses the ink ribbon cassette

Abstract

An ink ribbon cassette includes first and second rotatable bodies that rotate with an ink ribbon held between the rotatable bodies in sandwiched relation. The second rotatable body includes a hole through which a shaft extends such that the second rotatable body is rotatably supported on the shaft. The shaft may have a circumferential surface conical toward the free end, and the hole may be a conical hole into which the conical shaft extends. The shaft may include a plurality of cylindrical shaft portions that are in line with one another and that have different diameters. The second rotatable body is formed with a plurality of cylindrical hole portions having different diameters corresponding to the cylindrical shaft portions such that the second rotatable body is rotatably supported on the shaft.

Dependencies are inferred from the claim text.