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Rounding Actuator Wire Tips

IP.com Disclosure Number: IPCOM000050785D
Original Publication Date: 1982-Dec-01
Included in the Prior Art Database: 2005-Feb-10
Document File: 1 page(s) / 11K

Publishing Venue

IBM

Related People

Whitehead, K: AUTHOR

Abstract

One type of wire matrix printer uses individual solenoids for each wire of the printer. In constructing these actuators, the 0.014 inch tungsten carbide wire is fired through a guide of the same material, and it is necessary to grind both the wire and guide so that the surface is flat. This results in an extremely sharp edge on the wire which, if allowed to emain, will cause the ribbon to disintegrate in a short time.

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Rounding Actuator Wire Tips

One type of wire matrix printer uses individual solenoids for each wire of the printer. In constructing these actuators, the 0.014 inch tungsten carbide wire is fired through a guide of the same material, and it is necessary to grind both the wire and guide so that the surface is flat. This results in an extremely sharp edge on the wire which, if allowed to emain, will cause the ribbon to disintegrate in a short time.

In order to remove the sharp edge from the wire, the actuator can be continuously energized against a piece of moving emery cloth. An alternate method is to energize the actuator repeatedly into a vessel containing tumbling pea-sized stones. The stones should be of a hard material, such as aluminum oxide, and the vessel should be agitated to keep the stones moving around as the wires are fired into the loose medium.

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