Wire dot print head with print wires fixed to tip portions of ar

Details Wire dot print head with print wires fixed to tip portions of ar Wire dot print head with print wires fixed to tip portions of ar

1995-07-06

1997-07-29

Wiecking, David A.

Typewriting machines

Typing by other than type-face or type-die

Character formation by impact

40012404, 4001242, B41J 228

Patent

active

056516215

ABSTRACT:
Resiliency of a flat spring 7 corresponding to an end print wire 12 is set to be greater than that corresponding to a central print wire 12 by varying width of an effective spring portion 7b of a flat spring piece 7A to which an armature 13 is attached depending on positions of corresponding tips of the print wires 12. Distance between a magnet yoke 5 and a core 15 provided between the flat spring 7 and a permanent magnet 4 at a position corresponding to a central print wire 12 side is set to be smaller than that at a position corresponding to an end print wire 12 side by varying it depending on positions of corresponding tips of the print wires 12.

REFERENCES:
patent: 4548522 (1985-10-01), Harada et al.
patent: 4669898 (1987-06-01), Yeh et al.
patent: 4704041 (1987-11-01), Hayashi et al.
patent: 4934848 (1990-06-01), Hayashi et al.
patent: 4986676 (1991-01-01), Kimura et al.
patent: 4988222 (1991-01-01), Yamamoto et al.

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