Dot matrix print head

Details Dot matrix print head Dot matrix print head

1986-02-26

1987-02-10

Sewell, Paul T.

Typewriting machines

Typing by other than type-face or type-die

Character formation by impact

101 9305, 29433, 29464, B41J 312, B23P 1904

Patent

active

046419810

ABSTRACT:
A modified wire guide and assembly method for facilitating the insertion of wires into a dot matrix print head. In the preferred embodiment, the wire guide has a planar surface with downwardly extending wire holes defined by first and second surfaces. The first surface has a truncated conical shape and the second surface has a cylindrical shape. Additionally, the wire guide has an upwardly extending, inclined cam surface that intersects the planar surface to form a closed path. The first surface defining each hole is positioned adjacent the cam surface and intersects the closed path so that a wire striking the cam surface will move down it toward and into one of the holes. The assembly method of the present invention involves inserting a wire through three wire guides using aids that apply a first force in a first direction to bow the wire and then apply a second force in an opposite direction to guide the wire through the print head.

REFERENCES:
patent: 4047606 (1977-09-01), Ott
patent: 4081067 (1978-03-01), Schrag
patent: 4226545 (1980-10-01), Brandenburg

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