Magnetically actuated needle printing head and method of manufac

Details Magnetically actuated needle printing head and method of manufac Magnetically actuated needle printing head and method of manufac

1977-03-10

1979-09-04

Pieprz, William

Metal working

Method of mechanical manufacture

Assembling or joining

400124, 400719, B21K 2500

Patent

active

041663144

ABSTRACT:
A magnetically actuated printing needle of the type used in mosaic needle printing heads having printing needles moved by an axially movable armature connected to the needle is disclosed wherein the needle is provided with an armature received portion having a varying surface configuration locked into a bore in the armature by cold press forming of the armature after the needle is inserted thereinto.

REFERENCES:
patent: 2214491 (1940-09-01), Tondeur
patent: 3046824 (1962-07-01), Mohr
patent: 3058764 (1962-10-01), Scott et al.
patent: 3577850 (1971-05-01), Harris
patent: 3748723 (1973-07-01), Tomioka
patent: 3787791 (1974-01-01), Borger et al.
patent: 3850278 (1974-11-01), Mihm et al.
patent: 3897865 (1975-08-01), Darwin et al.
patent: 4051940 (1977-10-01), Kuelzer

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