Liquid purification or separation – Filter – Supported – shaped or superimposed formed mediums
Patent
1987-07-15
1989-01-31
Sever, Frank
Liquid purification or separation
Filter
Supported, shaped or superimposed formed mediums
204 11, 204 15, 21050025, 21050027, 264 42, 264DIG48, 264DIG70, B01D 1304, B01D 2904
Patent
active
048013790
ABSTRACT:
The microfilter foil is made of an inorganic substance such as metal with opened pores. Each pore is formed with a channel which increases in cross-section from the crest so as to obviate clogging. The foil is produced by exposure of a photosensitive layer of paint or lacquer with the use of an interference pattern produced by monochromatic and coherent light. A skin of inorganic material is produced on the photosensitive layer and portions of the skin are thereafter removed from the coated teeth in order to produce the pores in the subsequently formed foil.
REFERENCES:
patent: 2226381 (1940-12-01), Norris
patent: 2230868 (1941-02-01), Kuhlman
patent: 3695927 (1972-10-01), Futterer
patent: 4575406 (1986-03-01), Slafer
Ehrsam Christian
Ruegg Thomas
Sever Frank
Sulzer Brothers Limited
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