Head portion of a dot printer

Details Head portion of a dot printer Head portion of a dot printer

1978-05-11

1980-09-16

Sewell, Paul T.

Typewriting machines

Typing by other than type-face or type-die

Character formation by impact

101 9305, B41J 312

Patent

active

042226740

ABSTRACT:
The head portion of a dot printer includes a cup-shaped yoke, an electromagnet on a coil frame, an iron core within said coil frame, said core being securely fixed to said cup-shaped yoke, a second yoke, a movable element comprising a second iron core disposed for attraction by said electromagnet and a holding member for holding said movable element for rotation around a fulcrum on said fulcrum member. The structure is such that tolerances can be held closely in mass production, thereby providing high reliability and high quality printing at low cost.

REFERENCES:
patent: 3770092 (1973-11-01), Grim
patent: 3828908 (1974-08-01), Schneider
patent: 3896918 (1975-07-01), Schneider
patent: 3929214 (1975-12-01), Hebert
patent: 3991869 (1976-11-01), Berrey
patent: 4049107 (1977-09-01), Murat

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