Matrix pin print head

Details Matrix pin print head Matrix pin print head

1991-06-20

1992-08-11

Burr, Edgar S.

Typewriting machines

Typing by other than type-face or type-die

Character formation by impact

101 9305, B41J 223

Patent

active

051373815

ABSTRACT:
In a matrix pin print head, the armatures (15a) of the magnet drive (12), transferring the advance motions to the print pin, rest in each case against the print pin (4). The print pin (4) and the print pin head (22) form a rigid connection. In order to reduce friction and wear, the print pin head (22) is made of a technical ceramic material at the print pin end (21) and the print pin head (22) is formed as a molded piece (23). The print pin end (21) is adhesively attached in, pressed into, or sintered into the interior of the molded piece (23). The connection length (25) between the print pin and the print pin head corresponds at to at least twice the diameter (26) of the print pin (4).

REFERENCES:
patent: 4143979 (1979-03-01), Boyd
patent: 4176975 (1979-12-01), DeBoskey
patent: 4869605 (1989-09-01), Kikuchi et al.

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