Mechanical transmission

Details Mechanical transmission Mechanical transmission

1998-01-09

1999-11-30

Eickholt, Eugene

Typewriting machines

Sheet or web

Including friction-feed means

400625, 74 8914, 74425, B41J 3314

Patent

active

059930950

ABSTRACT:
An apparatus to drive a ribbon carrying a printing medium in an impact printer is implemented. The apparatus accommodates manual tightening of the ribbon by decoupling the drive motor from the ribbon cartridge without use of a clutch mechanism. A gear train effecting the required speed reductions between a drive motor and the ribbon cartridge spool also implements the decoupling. Reliability of the ribbon drive is improved thereby, and manufacturing and assembly costs are reduced over ribbon drives now used in impact printers.

REFERENCES:
patent: 3633841 (1972-01-01), Gardner
patent: 4006811 (1977-02-01), Metschnabl et al.
patent: 4376585 (1983-03-01), Fromme et al.
patent: 4787762 (1988-11-01), Arai
patent: 5570606 (1996-11-01), Irie
patent: 5605071 (1997-02-01), Buchanan
patent: 5825703 (1974-07-01), Riley
patent: 5842795 (1998-12-01), Narita et al.

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