Metal working – Method of mechanical manufacture – Electrical device making
Patent
1993-09-16
1995-10-03
Cuda, Irene
Metal working
Method of mechanical manufacture
Electrical device making
2989053, 2989054, B23P 1500
Patent
active
054541638
ABSTRACT:
A method of making a porous plug suitable for use as a phase separator, heat exchanger tube, wherein very small uniform holes are produced in a matrix by placing a first material in a matrix of a second material to form a bundle or billet comprising said materials, reducing the cross-section of the bundle or billet by drawing or extrusion to form a reduced cross-section rod, and then etching away one of the materials to leave a matrix with very small uniform holes therein. The reduced rod may be bundled with other similarly reduced rods to form a bundle which is again drawn to further reduce the cross-section thereof.
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McDonald William K.
O'Larey Philip M.
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