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Ribbon and Cassette Drive and Test Apparatus

IP.com Disclosure Number: IPCOM000086110D
Original Publication Date: 1976-Jul-01
Included in the Prior Art Database: 2005-Mar-03
Document File: 2 page(s) / 45K

Publishing Venue

IBM

Related People

Schall, TE: AUTHOR

Abstract

The figure illustrates test apparatus for testing the performance characteristics of a ribbon drive apparatus for ribbon cassettes. A ribbon such as an ink ribbon or possibly a magnetic tape 1, is withdrawn from the ribbon cartridge or cassette 2 and is fed through a continuous loop. The ribbon is driven into the cartridge 2 by a drive wheel 3 driven by a DC variable speed gear motor 4 attached to the drive roll 3 by a timing belt 5. A DC power supply 6 applies variable voltage to the DC motor 4 to adjust the speed of the takeup of the drive roll 3, and thereby vary the speed of movement in the tape loop.

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Ribbon and Cassette Drive and Test Apparatus

The figure illustrates test apparatus for testing the performance characteristics of a ribbon drive apparatus for ribbon cassettes. A ribbon such as an ink ribbon or possibly a magnetic tape 1, is withdrawn from the ribbon cartridge or cassette 2 and is fed through a continuous loop. The ribbon is driven into the cartridge 2 by a drive wheel 3 driven by a DC variable speed gear motor 4 attached to the drive roll 3 by a timing belt 5. A DC power supply 6 applies variable voltage to the DC motor 4 to adjust the speed of the takeup of the drive roll 3, and thereby vary the speed of movement in the tape loop.

The ribbon or tape 1 is drawn first to a guide 7 containing guide roll 8 and a pressure roll 9, at which the tension is varied by roller 10 and load screw and spring combination 11 which acts to adjust the pressure between rolls 9 and 10. A 180 degree twist (or more) may be incorporated in the ribbon loop as shown at 12 for the type of ribbon path which uses a mobius loop, if desired.

The ribbon 1 then passes over a tachometer generator 13 which has its voltage output monitored in the digital voltmeter 17. The digital voltage level is a direct measure of the speed that the tachometer generator 13 has developed and is a direct measure of the tape or ribbon velocity. The ribbon or tape then passes over a commercially available load cell 14, such as a Kistler #9203 cell to monitor the ribbon tension. Signals from the loa...