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Ribbon Spool Drive System

IP.com Disclosure Number: IPCOM000034493D
Original Publication Date: 1989-Mar-01
Included in the Prior Art Database: 2005-Jan-27
Document File: 2 page(s) / 51K

Publishing Venue

IBM

Related People

Engle, DE: AUTHOR [+2]

Abstract

An inexpensive and reliable ribbon drive mechanism capable of handling reversible film or fabric printer ribbons is provided by constructing a pair of spool enclosures each having a reversible drive motor and interchangeable spools with integrally molded support hubs and drive gears. The ribbon spool and its drive assembly are shown in Fig. 1, and the relationship of the drive assemblies and printer is seen in Fig. 2. In Fig. 1, rectangular enclosure 1 is open along one edge 2 and cut out at 3 on opposite surface panels 4 to form resilient fingers 5. One surface panel 4 has an opening (not shown) to receive a shaft 6 and pinion 7 of stepper drive motor 8 which is mounted to panel 4 by a twist and snap action.

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Ribbon Spool Drive System

An inexpensive and reliable ribbon drive mechanism capable of handling reversible film or fabric printer ribbons is provided by constructing a pair of spool enclosures each having a reversible drive motor and interchangeable spools with integrally molded support hubs and drive gears. The ribbon spool and its drive assembly are shown in Fig. 1, and the relationship of the drive assemblies and printer is seen in Fig. 2. In Fig. 1, rectangular enclosure 1 is open along one edge 2 and cut out at 3 on opposite surface panels 4 to form resilient fingers 5. One surface panel 4 has an opening (not shown) to receive a shaft 6 and pinion 7 of stepper drive motor 8 which is mounted to panel 4 by a twist and snap action. Spool 9 on which ribbon 10 is wound is molded with identical drive gear 11 and hub 12 on the outer surface of each spool end face. The spool is mounted within enclosure 1 by deflection of fingers 5 in the plane of the panels sufficiently to permit each hub 12 to seat in an opening 13.

(Image Omitted)

Each of a pair of enclosures 1 with a respective drive motor attached is placed from the inside into a respective recess 14 in printer frame 15, as shown in Fig.
2. Ribbon 10 is threaded between a pair of spools 9 which are each then mounted within an enclosure. The spool enclosures are retained within printer 15 by flexible retainers 16.

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