| 摘要 |
A spool for a business machine is provided on the hub with a prong for the attachment of a ribbon, such as an inked ribbon, to be wound on the spool, and with a projection, preferably on the hub itself, which prevents the prong from cracking, breaking or becoming permanently deformed under the hoop stress due to the wound ribbon. The prong also serves to reduce the risk of the prong being broken by the use, as is the habit of some operators, of a nail file or penknife or the like to facilitate the attachment of the ribbon to the prong. |
