Typewriting machines – Typing by other than type-face or type-die – Character formation by impact
Patent
1979-05-14
1981-11-17
Sewell, Paul T.
Typewriting machines
Typing by other than type-face or type-die
Character formation by impact
101 9305, B41J 312
Patent
active
043008453
ABSTRACT:
A dot matrix-type print head for forming a character-defining array of individual dots on a print-receiving surface includes a plurality of parallel-spaced print wires arranged in a vertical plane perpendicular to the print receiving surface. The print wires are individually actuated by respective actuator assemblies which each include a stationary portion consisting of an end plate, a bobbin, a solenoid winding, and a spring, and a movable portion consisting of a magnetic armature attached to the associated print wire. Upon energization of the solenoid winding the resulting magnetic flux displaces the magnetic armature and causes the print wire to impact the print-receiving surface. A frame comprising two parallel-spaced side plates maintains the stationary print head components in alignment, and progressive vertical displacement of the actuator assemblies within the plane of the print wires to align with respective print wires enables the actuator assemblies to be formed from identical components for manufacturing economy.
REFERENCES:
patent: 3787791 (1974-01-01), Borger et al.
patent: 3820643 (1974-06-01), Priebs et al.
patent: 3834506 (1974-09-01), Priebs
patent: 3929214 (1975-12-01), Hebert
patent: 3963108 (1976-06-01), Steinhausser
patent: 4044878 (1977-08-01), Kunath
Hoffman Robert C.
Kruse Richard H.
Martin Donald P.
Qwint Systems Inc.
Sewell Paul T.
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