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Superplastic Printer Type Characters

IP.com Disclosure Number: IPCOM000076961D
Original Publication Date: 1972-May-01
Included in the Prior Art Database: 2005-Feb-24
Document File: 1 page(s) / 11K

Publishing Venue

IBM

Related People

Piggin, BP: AUTHOR [+2]

Abstract

Superplastic materials (e.g. Zn/Al alloy at 250 to 270 degrees C) are easily formed into inexpensive dies to produce parts with extremely fine surface detail. At room temperature, their strain rate sensitivity makes them very hard under high-speed impact conditions. This combination of properties makes these materials ideal for the manufacture of high-speed printer type characters.

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Superplastic Printer Type Characters

Superplastic materials (e.g. Zn/Al alloy at 250 to 270 degrees C) are easily formed into inexpensive dies to produce parts with extremely fine surface detail. At room temperature, their strain rate sensitivity makes them very hard under high-speed impact conditions. This combination of properties makes these materials ideal for the manufacture of high-speed printer type characters.

In practice billets of a suitable superplastic material are forged into dies engraved with the required characters. As well as Zn/Al alloy, stainless steel and copper-based or titanium-based alloys rendered superplastic are suitable materials. Since these materials have a tendency to `creep' if subjected to prolonged low-pressure conditions, contact with paper during printing should be made as short as possible. Consequently, characters formed of superplastic alloy are best employed in printers having a very high-print rate.

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