Method for forming a semi-permeable strip
US3969548A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 21, 1974 |
| Grant date | Jul 13, 1976 |
| Priority date | — |
| Expiry date | Nov 21, 1994 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D2313/08
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A method of forming membrane covered laminate strips of a desired predetermined length from an elongated porous strip wherein said strip is impregnated at spaced predetermined sections with a fluid seal material to preclude fluid flow through such sections and is also coated on each face with a suitable membrane forming coating material to thereby form a laminate strip suitable for reverse osmosis and/or ultrafiltration usage. The resulting laminate strip is provided with a punched hole in a portion of the impregnated section to effect a fluid passageway opening therethrough and, additionally, is cut transversely through an intermediate portion of such section to result in the formation of a multiplicity of predetermined length laminate strips. A plurality of stacked strips, with the punched hole positions staggered in adjacent strips, or groups of strips, provides a simplified form of apparatus with an elongated serpentine flow path therethrough for separating the constituents of a fluid feed stream.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.