Dot matrix printer head

Details Dot matrix printer head Dot matrix printer head

1985-09-12

1987-08-18

Sewell, Paul T.

Typewriting machines

Typing by other than type-face or type-die

Character formation by impact

101 9304, 101 9348, 400124, B41J 312

Patent

active

046873546

ABSTRACT:
A reduced size and power dot matrix printing head having a chair shaped yoke with opposed off-set portions. Electromagnets are secured to the inner sides of the opposed off-set portions of the yoke permitting staggering of the electromagnets. Heavy biasing springs for securing the print pins in an inoperative position are avoided reducing the size and power of the electromagnets needed resulting in a further reduction in the overall size and power of the dot matrix printing head.

REFERENCES:
patent: 3217640 (1965-11-01), Bradshaw
patent: 3900094 (1975-08-01), Larsen
patent: 4046244 (1977-09-01), Velazquez
patent: 4101017 (1978-07-01), Englund
patent: 4156960 (1979-06-01), Ikeda
patent: 4218149 (1980-08-01), Okada
patent: 4218150 (1980-08-01), Swaim
patent: 4230411 (1980-10-01), Grottrup
patent: 4236836 (1980-12-01), Hodne
patent: 4474485 (1984-10-01), Sekiguchi
patent: 4572070 (1986-02-01), Moulin

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