Browse Prior Art Database

Ribbon Supply Spool

IP.com Disclosure Number: IPCOM000091741D
Original Publication Date: 1968-May-01
Included in the Prior Art Database: 2005-Mar-05
Document File: 2 page(s) / 43K

Publishing Venue

IBM

Related People

Gibson, DK: AUTHOR

Abstract

A ribbon spool, mounted on the moving carriage of a single printing element typewriter, is constructed to prevent coning or riding up of the ribbon when the carriage stops abruptly. Supply spool 1 with cap 3 attached is mounted on supply spool stud 2 and held in place by C-clip 4. Inner portion 5 of spool 1 is constructed so that cap 3 fits tightly around stud 2 at the top, but spool 1 fits very loosely at the bottom. When the carriage stops abruptly, the lower portion of spool 1 is free to be swung by its inertia until portion 5 contacts spool 2. This pendulum action of spool 1 causes ribbon 6, which is wound on core 7, to be thrown down. Such action occurs when the carriage stops abruptly.

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Ribbon Supply Spool

A ribbon spool, mounted on the moving carriage of a single printing element typewriter, is constructed to prevent coning or riding up of the ribbon when the carriage stops abruptly. Supply spool 1 with cap 3 attached is mounted on supply spool stud 2 and held in place by C-clip 4. Inner portion 5 of spool 1 is constructed so that cap 3 fits tightly around stud 2 at the top, but spool 1 fits very loosely at the bottom. When the carriage stops abruptly, the lower portion of spool 1 is free to be swung by its inertia until portion 5 contacts spool 2. This pendulum action of spool 1 causes ribbon 6, which is wound on core 7, to be thrown down. Such action occurs when the carriage stops abruptly. The outer winding of ribbon 6 does not slide up off the top of the inner windings which can occur when spool 1 is not free to swing on stud 2. C-clip 4 is mounted high enough above cap 3 that there is no contact when ribbon 6 and spool 1 are thrown vertically during regular type impact.

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