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Ribbon Cartridge with Brake

IP.com Disclosure Number: IPCOM000093432D
Original Publication Date: 1967-Sep-01
Included in the Prior Art Database: 2005-Mar-06
Document File: 2 page(s) / 85K

Publishing Venue

IBM

Related People

Arena, JP: AUTHOR [+2]

Abstract

The cartridge for a typewriter ribbon in the right drawing contains a spring deformed and held by the contours of the cartridge. Such arrangement provides a nip with gentle force acting as part of a brake to inhibit the unwinding of the ribbon. Especially for lightweight typewriter ribbons, proper feeding in some typewriter ribbon feed mechanisms requires a superimposed braking action applied to the ribbon near the supply spool. The supply spool here includes such a brake as part of the spool.

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Ribbon Cartridge with Brake

The cartridge for a typewriter ribbon in the right drawing contains a spring deformed and held by the contours of the cartridge.

Such arrangement provides a nip with gentle force acting as part of a brake to inhibit the unwinding of the ribbon. Especially for lightweight typewriter ribbons, proper feeding in some typewriter ribbon feed mechanisms requires a superimposed braking action applied to the ribbon near the supply spool. The supply spool here includes such a brake as part of the spool.

The housing for the spool of typewriter ribbon 1 includes a generally pan- shaped cover 2 made of thin, rigid plastic. Cover 2 is glued at spaced points 3 to a flat, rigid back 5. at the sides of cover 2 and extending perpendicular toward back 5 are side portions 2A, 2B, and 2C. Cover 2 is shown broken away to better show these side portions. Portion 2C has an outwardly extending end 7. This carries a friction pad 9 of an adhesively connected ceramic or perfluorohydrocarbon layer. These materials present the relatively low coefficient of friction desired. as part of cover 2, at a location somewhat clockwise of pad 9 and positioned somewhat further radially away from the center of the carriage, is a portion carrying an extension 11 which connects to back 5.

Spring 13 is shown in both drawings. In the left drawing, spring 13 is a flat piece of steel which is punched and deformed under pressure. Spring 13 has hooked end 13A, extending member 13B whi...