Method of selectively annealing a needle

Details Method of selectively annealing a needle Method of selectively annealing a needle

2006-02-21

2006-02-21

Dawson, Glenn K. (Department: 3731)

Metal treatment

Process of modifying or maintaining internal physical...

Heating or cooling of solid metal

C148SDIG030, C606S224000

Reexamination Certificate

active

07001472

ABSTRACT:
An improved method of selectively annealing a needle and the needle prepared by the improved method is disclosed. A curved needle is positioned adjacent a flat electromagnetic induction coil. The curved body of the needle is positioned in a plane parallel with the coil plane of the flat induction coil. A current is delivered through the coil to selectively heat and consequently selectively anneal a portion of the needle. The improved method enables the selective annealing of curved needles, and is especially useful for the manufacture of surgical needles.

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patent: 5968394 (1999-10-01), Schob
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