| 摘要 |
A spool retainer prevents the spools of a tape cartridge from unwinding during shipping or storage and also serves as an installation aid that remains on the cartridge during installation into a printing mechanism to retain and precisely locate the ribbon within the cartridge during installation. The retainer includes a substantially flat back wall; two spaced apart tabs projecting in a direction perpendicular to the back wall; and a protruding wall extending in the direction from a lower end of the back wall substantially parallel with the tabs. The two spaced apart tabs are adapted for mating with splines within spools of a ribbon cartridge and fixedly engage the splines to prevent relative movement between the spools. The protruding wall protects exposed ribbon during both storage and installation.
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