Ribbon cartridge with broken unidirectional friction drive and self cleaning gears
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Abstract
A printer ribbon cartridge device includes structure for maintaining tension of a printer ribbon which is supplied and contained on a supply spool having an automatic brake for preventing unwinding thereof whenever the cartridge is not installed on a printer. Ribbon guide structure is provided so that the printer ribbon will be confined to a desired path, positive capstan feed rollers are provided of intermeshing gear type for positive feed of the printer ribbon and further gearing is provided to positively drive a slipping clutch element for a take-up spool. A one-way locking pawl also engages with the gearing to prevent rewinding of the printer ribbon after use and thereby prevent the reuse of same. The slip clutch for the take-up spool employs a gear driven input hub member provided with a central recess thereacross for supporting a deformed ring in an oval shape for driving contact by portions of the other circumference thereof against the inner surface of an outer take-up spool hub member. The overall device includes a first support panel and a second support panel having complementary projections and boss apertures formed respectively therewith for easy rapid assembly of all the components into a completed cartridge device.
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Specification
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Current AssigneeData Card Corp.
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Original AssigneeData Card Corp.
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InventorsSchroeder, Marvin C., Stastny, Edwin O.
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Primary Examiner(s)Wright, Jr., Ernest T.
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Application NumberUS05/944,162Time in Patent Office993 DaysField of Search400/194, 400/195, 400/196, 400/196.1, 400/207, 400/208, 400/208.1, 400/234, 400/235, 400/235.1, 400/636, 400/641US Class Current400/208CPC Class CodesB41J 32/00 Ink-ribbon cartridgesB41J 33/26 by rollers engaging the ribbonB41J 33/52 Braking devices therefor
