Operating mechanism for a dot matrix printer

Details Operating mechanism for a dot matrix printer Operating mechanism for a dot matrix printer

1979-04-10

1980-12-02

Sewell, Paul T.

Typewriting machines

Typing by other than type-face or type-die

Character formation by impact

101 9305, B41J 312

Patent

active

042368375

ABSTRACT:
A dot matrix printer comprises an armature connected to a pin, the end of the pin in use, engaging the surface of a paper tape. A preloaded spring is provided to act upon the armature and electromagnetic means is provided and which when energized move the armature against the action of the spring. The armature when the electromagnetic means is de-energized, moves under the action of the spring so that the armature and pin move towards paper. The extent of travel of the armature under the direct action of the spring is limited whereby the inertia only of the armature and the pin causes the impact of the pin with the paper.

REFERENCES:
patent: 3333667 (1967-08-01), Nordin
patent: 3770092 (1973-11-01), Grim
patent: 3973661 (1976-08-01), DeBoo et al.

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