Coinjection molded daisywheel printhead

Details Coinjection molded daisywheel printhead Coinjection molded daisywheel printhead

B - Operations, Transporting

41

J

197/76

B41J 1/30 (2006.01) B29C 45/16 (2006.01)

Patent

CA 1300545

LE9-86-013 COINJECTION MOLDED DAISYWHEEL PRINTHEAD Abstract of The Disclosure A printhead is formed by injecting unfilled nylon by injection unit 1 and mineral filled nylon by injection unit 3. The filling adds impact resistance for printing, while the unfilled nylon is particularly resistant to flexural fatigue near the hub of the printwheel. Unit 1 is operated first to form an outer layer, with quantity limited so that the outer layer comes to about the middle of the arms of printheads. Unit 2 is then operated to form a core and to be the only material forming the character elements. The resulting printhead is durable and is capable of use at greater deflection than the same printhead made of only the impact resistant material.

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