Dot matrix print head

Details Dot matrix print head Dot matrix print head

1984-12-10

1986-10-21

Sewell, Paul T.

Typewriting machines

Typing by other than type-face or type-die

Character formation by impact

101 9305, 29445, 29602R, B41J 312

Patent

active

046182764

ABSTRACT:
This invention involves methods and apparatus relating to the assembly and structure of a dot matrix print head. In the preferred embodiment, the tops of the bobbins, yoke members, and pole pieces are ground flush in a common plane. The common plane is then used as a reference to mount and assembly remaining elements of the print head including the clapper members and backstop for the clapper members. The clapper members are mounted for pivotal movement between first and second positions by a cover member and securing cap. For uniform operation, the pivotal axis are all in the common reference plane on respective bobbin members and the gaps of the clapper members are automatically set to the identical size by intermeshing fingers on the cover and cap members. Additionally, corresponding and abutting surfaces on the bobbins, cover member, and cap member act in concert by the operation of a single screw to properly align, assembly, and adjust the operating parts of the print head.

REFERENCES:
patent: 4165940 (1979-08-01), Cacciola
patent: 4222674 (1980-09-01), Mori
patent: 4244658 (1981-01-01), Mori
patent: 4260270 (1981-04-01), Cavallari
patent: 4320981 (1982-03-01), Harrison

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