Ribbon cartridge with integral anti spool rotation device

摘要

Cartridges housing ribbon spools with a length of ribbon extending externally of the cartridge between exit and inlet openings in the cartridge are provided with an integral anti spool rotation device to prevent spool rotation as would allow inadvertent or accidental withdrawal of an undue length of ribbon externally of the cartridge. Incident to mounting the cartridge on a machine, the locking device is moved to a spool release position without detachment or separation from the cartridge for later movement to anti rotation position if removal of an unspent cartridge is required.