Print hammer assembly method

Details Print hammer assembly method Print hammer assembly method

1983-04-04

1985-06-18

Envall, Jr., Roy N.

Electric heating

Metal heating

Cutting or disintegrating

76101R, 101 9348, 219 69E, 219 85BM, 219121LE, B23P 108, B23K 2600, B41J 9127

Patent

active

045242593

ABSTRACT:
The impact pins of a matrix printhead are brazed by a laser to a print hammer of the flat spring type. The print hammers are then attached to a printhead mounting block adjacent to each other with the impact pins in substantially a straight line. The attached print hammers are then shaped by an electric discharge machining (EDM) process by a single electrode to simultaneously machine the impact pins to the desired shape and to position the tips of the impact pins at a precise distance with respect to one another.

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patent: 4386563 (1983-06-01), Farb
patent: 4387287 (1983-06-01), Marazzi
IBM Technical Disclosure Bulletin, vol. 24, No. 11A, Apr. 1982, p. 5482 "Method for Making a Multiple Hammer Element" by Hanna et al.
IBM Technical Disclosure Bulletin, vol. 25, No. 8, Jan. 1983, p. 4376 "Sheet Metal Print Actuator" by Helinski.
IBM Technical Disclosure Bulletin, vol. 27, No. 2, Jul. 1984, p. 1099 "Print Hammer Mounting Arrangement For a Matrix Printer" by Lean et al.

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