Typewriting machines – Typing by other than type-face or type-die – Character formation by impact
Patent
1985-03-26
1986-12-16
Sewell, Paul T.
Typewriting machines
Typing by other than type-face or type-die
Character formation by impact
101 9305, B41J 312
Patent
active
046293442
ABSTRACT:
A dot matrix print head which has on the side of the print countersupport (1) a print needle adjustment unit (3) with an electromagnetically drivable guide orifice (7) for the print needles (4) on an adjustment element (6). To provide a precise adjustment for the guide orifice (7) with controllable production tolerances, with flat design of the print head in the area of the guide orifice (7), and with easy installation, to provide a changeover for several guide orifices (7), and to define reliable end positions of the guide orifices (7), the adjustment element (6) consists of a guide support (7) mounted in the area of the print needle drive unit (2) and swiveling by means of a play-free joint (8). An electromagnet (15), fastened next to the guide support (7), is mounted on an armature bridge (13) supported in a play-free swivel bearing (14) running crossways to the guide support (7). The armature bridge (13) rests on the guide support (7) by spaced supporting projections (18), (19).
REFERENCES:
patent: 3882985 (1975-05-01), Liles
patent: 4400101 (1983-08-01), Hendrischk
patent: 4459051 (1984-07-01), Kawai
patent: 4541745 (1985-09-01), Gugel
Mannesmann Aktiengesselschaft
Sewell Paul T.
Siegemund Ralf H.
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