Membrane filter tube and method of preparation
US4767426A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 5, 1987 |
| Grant date | Aug 30, 1988 |
| Priority date | — |
| Expiry date | Oct 5, 2007 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29L2031/14
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A membrane filter which comprises a porous, self-supporting, end axially-compressible filter tube, and a microporous membrane sheet bonded to the external surface of the filter tube, the membrane sheet overlapping the one and other ends of the filter tube and extending across the full edge width at the ends to provide a membrane filter to seal into a housing by axial compression without the need for gaskets, end caps or adhesives. A method of preparing a membrane filter tube, which method comprises securing a microporous membrane to the external surface of a self-supporting, axially compressible filter tube and overlapping and securing the ends of the membrane across the ends of the full edge width of the filter tube. A method of using a membrane filter which comprises sealing the membrane filter in a housing by axially compressing one or both ends of the membrane filter tube across the full edge width of the membrane by a surface housing to provide an effective seal at one or both ends without the need for end caps, gaskets or adhesives.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.