Stock material or miscellaneous articles – All metal or with adjacent metals – Having metal particles
Patent
1993-04-27
1996-04-23
Walsh, Donald P.
Stock material or miscellaneous articles
All metal or with adjacent metals
Having metal particles
55347, 2103231, 210359, B01D 3600
Patent
active
055101941
ABSTRACT:
Perforated plates for use as filter media and devices for fluid injection and extrusion have a multiplicity of holes of a uniform size and a selected diameter as small as 0.5 micron. The plates are made by a "wire drawing" process wherein a sacrificial wire material in a plate metal can is repeatedly extruded and restacked, elongating the wire and reducing its diameter. Plates are then cut from the extruded composite, and the wire metal is removed by selective etching. By use of this process, perforated plates with several features unavailable previously are obtained. In particular, the plates have much smaller holes, higher porosity, and uniform size and shape, along with any desired thickness and a high length-to-diameter ratio. Such plates are ideally suited for use as a medium for various types of filters where removal of contaminants sized in the lower micron range is desired. Size and distribution of the holes in the plate are precisely controllable, enabling separations of materials of specific sizes.
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Brochure entitled "Collimated Hole Structures," author unknown, published by Technical Products Division, Brunswick Corporation, 1968.
Dingus Michael L.
Hendricks John B.
Alabama Cryogenic Engineering, Inc.
Beumer Joseph H.
Bluni Scott T.
Phillips C. A.
Walsh Donald P.
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