Patent ID: 6161972
Filing Date: 2000-12-19
Classification: B41J

Abstract:
An ink ribbon cartridge, comprising:an ink ribbon including a band-like sheet with a layer of ink formed on one surface thereof;a pair of spools for holding the ink ribbon, each of the pair of spools having two ends, two end faces and a hole formed in each of the two ends, wherein two slots are formed in each end face of the pair of spools; andfour spindles each having one end including a disk-shaped section, and an other end, wherein each of the other ends of the four spindles are seated in the holes formed in the ends of the pair of spools;wherein the other end of a specific one of the four spindles can not be seated in the holes formed in the ends of three of four ends of the pair of spools, and the other ends of the other three of the four spindles can not be properly seated in the hole formed in the end of a specific one of four ends of the pair of spools.