Actuator for a wire matrix printer and method of making

Details Actuator for a wire matrix printer and method of making Actuator for a wire matrix printer and method of making

B - Operations, Transporting

41

J

101/96.08

B41J 2/285 (2006.01)

Patent

CA 1075970

Title of the Invention ACTUATOR FOR A WIRE MATRIX PRINTER AND METHOD OF MAKING Abstract of the Disclosure An actuator for a wire matrix printer including a plunger having opposed abutment areas thereon, which plunger is mounted in a frame for reciprocal movement between first and second positions therein, and the plunger has a print wire fixed thereto by a special swaging technique. The plunger is moved to and held in the first position against the bias of a special "H"-shaped spring (having opposed fin- gers to engage the abutment areas on the plunger) by a permanent magnet. When the actuator is to be fired, a neu- tralizing coil is energized to nullify the holding effect of the magnet, enabling the spring to accelerate the plunger towards the second position (towards a platen). The spring is disconnected from the plunger after it is accelerated, enabling the plunger and print wire attached thereto to travel ballistically at least part of the way to the second posi- tion from the first position.

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