Matrix pin printer with adjustable print pin guide

Details Matrix pin printer with adjustable print pin guide Matrix pin printer with adjustable print pin guide

1988-10-25

1990-02-13

Sewell, Paul T.

Typewriting machines

Typing by other than type-face or type-die

Character formation by impact

101 9305, B41J 312

Patent

active

049001671

ABSTRACT:
The print pin drive device group (3) and a print pin guide device group (5) with a casing (8) guiding the print pins (7) is provided with an adjustable print pin guide (2) at a matrix pin print head (1). An electric lifting magnet (9) with set screw (12) for the magnet core (13) is disposed in the regiion of the print pin guide device group (5). The magnet core (13) forms together with a pin guide carrier (15) an adjustable magnetic discontinuity air gap (14). Therefore, the pin guide carrier (15) is movable back and forth between two fixedly adjustable positions. In order to provide for a precisely operating print pin guide, which is also suitable for shorter, more bend-resistant print pins, behaving stiffer against bending, it is disclosed that the electric lifting magnet (9) is disposed with its coil center axis (16) perpendicular to the center axis (17) of the matrix pin print head (1) running perpendicular to the print direction of the print pins (7) and that the magnet core (13), movable in a guide, is connected with a parallel adjustable pin guide carrier (15).

REFERENCES:
patent: 3882985 (1975-05-01), Liles
patent: 4284363 (1981-08-01), Choberka
patent: 4459051 (1984-07-01), Kawai
patent: 4605323 (1986-08-01), Blanchard
patent: 4640633 (1987-02-01), Hebert

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