Print head for a dot matrix printer

Details Print head for a dot matrix printer Print head for a dot matrix printer

1981-08-05

1983-06-21

Sewell, Paul T.

Typewriting machines

Typing by other than type-face or type-die

Character formation by impact

101 9305, B41J 312

Patent

active

043891284

ABSTRACT:
A print head for use in a dot-matrix printer consisting of a plurality of print wires, a guide member with a nose portion for guiding the print wires, a plurality of armatures, an armature support member for supporting one end of the armatures corresponding to each of the print wires, and an armature drive device having a magnetic member with electromagnets respectively corresponding to the armatures. The guide member, the armature support member and the magnetic member are firmly connected in that order by a hollow cylindrical connecting member which fits on the connected members from the side of the last member. The front end of the connecting member is secured by laser welding or the like to the periphery of the guide member, and a plurality of resilient tongues formed on the rear end thereof are engaged with the magnetic member to bias the magnetic member and the armature support member toward the guide member. On the external periphery of each of those members, a pair of positioning shoulders are respectively formed, and on the connecting member a pair of slits are formed. By aligning those shoulders and slits, correct relative positioning of all the members can be easily performed.

REFERENCES:
patent: 4009772 (1977-03-01), Glaser et al.
patent: 4225250 (1980-09-01), Wagner et al.
patent: 4300845 (1981-11-01), Martin et al.

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