Matrix printing cell and head assembly

Details Matrix printing cell and head assembly Matrix printing cell and head assembly

1977-11-18

1980-08-19

Sewell, Paul T.

Typewriting machines

Typing by other than type-face or type-die

Character formation by impact

101 9305, B41J 312

Patent

active

042181488

ABSTRACT:
An improved printing cell and head for dot matrix impact printers, including an armature of exceptionally low mass mounted on a pair of straight, cylindrical spring elements, and driven by a pair of coils wired in parallel. By careful selection of the ramp angle of respective pole faces, and a resilient preset and energy-absorbing device, printing speeds of 2,500 Hz can be achieved with remarkably quiet operation.

REFERENCES:
patent: 3187668 (1975-06-01), Marsh
patent: 3335659 (1967-08-01), Schacht et al.
patent: 3467232 (1969-09-01), Paige
patent: 3842737 (1974-10-01), Gomi
patent: 3842955 (1974-10-01), Iwasaki
patent: 3893220 (1975-07-01), Bittner
patent: 3897865 (1975-08-01), Darwin et al.
patent: 3994381 (1976-11-01), Hebert
patent: 4004671 (1977-01-01), Kondur

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