Printer head with adjustable magnetic reluctance

Details Printer head with adjustable magnetic reluctance Printer head with adjustable magnetic reluctance

1987-07-27

1990-06-19

Eickholt, Eugene H.

Typewriting machines

Typing by other than type-face or type-die

Character formation by impact

4001572, 101 9305, 101 9348, 335237, B41J 302

Patent

active

049348485

ABSTRACT:
A printer head comprising a plurality of driving arms provided corresponding to a like plurality of printing elements and a like plurality of electromagnetic driving devices for driving the corresponding driving arms independently. Each of the electromagnetic driving devices includes a movable yoke fixed to a corresponding driving arm, a core piece facing the yoke and having a coil mounted around the core piece, and a magnet adjacent to the core piece. Each of the magnetic circuits includes an adjusting member for adjusting the magnetic reluctance thereof.

REFERENCES:
patent: 885688 (1908-04-01), Cubitt
patent: 936503 (1909-10-01), Williams
patent: 1632609 (1927-06-01), Lee
patent: 2282933 (1942-05-01), Cahill
patent: 4461207 (1984-07-01), Helinski

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