Printhead needle cap

Details Printhead needle cap Printhead needle cap

1977-05-04

1979-03-13

Sewell, Paul T.

Typewriting machines

Typing by other than type-face or type-die

Character formation by impact

101 9305, B41J 310

Patent

active

041439791

ABSTRACT:
A print member of the printhead of a ballastic type wire matrix printer terminates in an impression end and in an activation end. A cap is formed at the activation end for contact by the blade-like armature of an activating electromagnet. A tip is formed at the activating end of the member with a first layer of a relatively stiff plastic material affixed to and surrounding the tip and a second layer of relatively tough and abrasion resistive plastic material is affixed to the first layer and positioned to be contacted by the armature.

REFERENCES:
patent: 3929214 (1975-12-01), Hebert

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