Dot print head having a torsion bar with elastic portions

Details Dot print head having a torsion bar with elastic portions Dot print head having a torsion bar with elastic portions

1988-10-14

1990-05-15

Eickholt, Eugene H.

Typewriting machines

Typing by other than type-face or type-die

Character formation by impact

101 9305, 228215, B41J 302

Patent

active

049256254

ABSTRACT:
A dot print head including armatures, supporting parts for supporting the armatures, and torsion bars for supporting the armatures on the supporting parts. Open grooves are formed at least in either the armatures or the supporting parts to place the torsion bars therein, to contain a brazing filler metal therein and to braze the torsion bars to the armatures or the supporting parts by melting the brazing filler metal in the open grooves, and flanges are formed integrally with each torsion bar so as to be positioned between the elastic portions of the torsion bar and the open grooves. The width of the base end of each armature or that of each supporting part is reduced to form a gap between the armature and the supporting part in a width sufficient to form the elastic portion of the torsion bar in a length greater than a predetermined value.

REFERENCES:
patent: 3842955 (1958-07-01), Iwasaki
patent: 4634301 (1987-01-01), Sakaida

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