Metalloid filament wire matrix print head

Details Metalloid filament wire matrix print head Metalloid filament wire matrix print head

1977-12-05

1979-12-04

Sewell, Paul T.

Typewriting machines

Typing by other than type-face or type-die

Character formation by impact

423298, 423448, B41J 310, C01B 3502, C01B 3104

Patent

active

041769759

ABSTRACT:
A wire matrix print head mechanism is disclosed in which a wear and impact resistant, flexible, smooth, tough and economical metalloid element filament material is utilized as the impact print wire. The wire material's flexibility eliminates many of the problems of breakage and brittleness failures encountered in previous designs. The lower coefficient of friction and greater smoothness of the wire material lowers the magnet forces required to push the wires through wire guides in the print head. The extreme hardness of the metalloid material combined with its high flexibility and toughness facilitate the production of impact and wear resistant, easily assembled long life wire matrix print heads.

REFERENCES:
patent: 3438884 (1969-04-01), Juhola et al.
patent: 3692479 (1972-09-01), Meadows et al.
patent: 3828908 (1974-08-01), Schneider
patent: 3993738 (1976-11-01), Overholser et al.
patent: 4016247 (1977-04-01), Otani et al.
patent: 4071604 (1978-01-01), Schwemer

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