Matrix printing head

Details Matrix printing head Matrix printing head

1980-02-07

1982-03-02

Sewell, Paul T.

Typewriting machines

Typing by other than type-face or type-die

Character formation by impact

101 9305, B41J 312

Patent

active

043176356

ABSTRACT:
In a matrix printing head (1) including at least one printing needle (9), an electromagnet (2), which is provided with an armature (4) co-operating with the printing needle for moving the latter towards a printing position, and a spring (6) for returning the needle in a direction from the printing position, the printing needle is pivotably and detachably connected to the armature (4) by means of said spring (6). The pivotable connection is accomplished by the printing needle (9) being provided with a curved end (9b) pivotably supported in a groove (4c) in the armature (4). The curved end of the needle is retained in this groove by means of said spring (6). The armature (4) is pivotably supported in a notch (5b) in a yoke (5) carrying a plurality of electromagnets (2) and is detachably supported in the notch by means of said spring (6).

REFERENCES:
patent: 3631797 (1972-01-01), Johnston et al.
patent: 3828908 (1974-08-01), Schneider
patent: 3973661 (1976-08-01), De Boo et al.
patent: 3982622 (1976-09-01), Bellino et al.
patent: 4005770 (1977-02-01), Hirose et al.

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