Dot matrix printer/module using print wires having different len

Details Dot matrix printer/module using print wires having different len Dot matrix printer/module using print wires having different len

1984-02-21

1989-09-19

Wiecking, David A.

Typewriting machines

Typing by other than type-face or type-die

Character formation by impact

101 9305, B41J 112

Patent

active

048675830

ABSTRACT:
A dot matrix shuttle printer and/or a module therefore uses print wires of different lengths so as to achieve desired close packing of individual print wire actuators and correspondingly close wire-to-wire spacing of the print wires. To help maintain synchronization between the operation of all print wires, the longer ones include hollow sections so as to cause all the print wires to have substantially equal mass in spite of their differing lengths. The longer print wires include a hollow tube of stainless steel. A tip of wear resistant material is fixedly inserted at one end of the tube to effect impact printing.

REFERENCES:
patent: 3376171 (1968-04-01), Verdoak
patent: 3876050 (1975-04-01), Linder
patent: 3896918 (1975-07-01), Schneider
patent: 3904011 (1975-09-01), Matschke et al.
patent: 3994381 (1976-11-01), Hebert
patent: 4004673 (1977-01-01), Burzlaff et al.
patent: 4098388 (1978-07-01), Dubois
patent: 4143979 (1979-03-01), Boyd
patent: 4279518 (1981-07-01), Blomquist
patent: 4306497 (1981-12-01), Hamada
"Matrix Print Head Wire Length Adjustment Technique"; R. H. Harris; IBM Technical Disclosure Bulletin; vol. 26, No. 2, p. 794-S; Jul. 1983; 400/124.

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