Ribbon mask and guide for dot matrix impact printers

Details Ribbon mask and guide for dot matrix impact printers Ribbon mask and guide for dot matrix impact printers

1977-02-17

1979-08-21

Sewell, Paul T.

Typewriting machines

Typing by other than type-face or type-die

Character formation by impact

400248, B41J 312, B41J 3112

Patent

active

041651880

ABSTRACT:
A ribbon mask for a wire or stylus-type dot matrix print head is carried with the print head, positioned between the print ribbon and the printing surface, and has a forwardly-angled integral flange extending from along a portion of the top of the main body of the ribbon mask. The flange rigidifies the intersection where the main body of the mask meets the flange, so that curving the ribbon mask along its longitudinal axis forms a generally triangular, forwardly-biased face adjacent the printing surface. Centrally located within the face is a vertically-oriented oval opening through which pass the printing wires as they move toward and strike the ribbon against the printing surface to form dot characters.

REFERENCES:
patent: 2919785 (1960-01-01), Newman et al.
patent: 3747734 (1973-07-01), Norman et al.
patent: 3964595 (1976-06-01), Edstrom
patent: 3987883 (1976-10-01), Darwin et al.
patent: 3990560 (1976-11-01), Pavliscail et al.

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