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Ribbon Takeup Tensioning Device

IP.com Disclosure Number: IPCOM000061399D
Original Publication Date: 1986-Jun-01
Included in the Prior Art Database: 2005-Mar-09
Document File: 1 page(s) / 12K

Publishing Venue

IBM

Related People

Thomas, JE: AUTHOR

Abstract

When a ribbon cartridge is removed from a machine such as a typewriter or printer, for example, a compressible roller binds a ribbon against a wall of the cartridge to prevent the ribbon from moving. This prevents ribbon breakage during the next usage of the ribbon due to looping of the ribbon over the take up spool, for example. During use, the material of the roller compresses allowing the roller to turn and thus less tendency for the ribbon to move up and down the roller to also reduce ribbon breakage.

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Ribbon Takeup Tensioning Device

When a ribbon cartridge is removed from a machine such as a typewriter or printer, for example, a compressible roller binds a ribbon against a wall of the cartridge to prevent the ribbon from moving. This prevents ribbon breakage during the next usage of the ribbon due to looping of the ribbon over the take up spool, for example. During use, the material of the roller compresses allowing the roller to turn and thus less tendency for the ribbon to move up and down the roller to also reduce ribbon breakage.

A ribbon cartridge 1 has a roller 2 disposed in a ribbon entrance passage 3 through which a ribbon 4 passes into the cartridge 1 for return to take up spool within the cartridge 1. The roller 2 has an annular sleeve 5 of a compressible material such as open cell foam, for example, mounted thereon to form part of the roller 2. The sleeve 5 has an inner diameter smaller than the outer diameter of the roller 2 to provide an elastic grip of the sleeve 5 on the roller 2. The outer diameter of the sleeve 5 is such that the sleeve 5 rubs against a wall 6 of the cartridge 1 and binds the ribbon 4 thereagainst, as shown in Fig. 1, when the cartridge 1 is removed from a printer or typewriter.

When the cartridge is mounted on a printer or typewriter as shown in Fig. 2, the ribbon 4 has a different entrance angle into the passage 3 due to the ribbon 4 passing around a roller 7 of the printer or typewriter on whch the cartridge 1 is mounted. T...