Membrane cartridge with improved central collection tube
US4021351A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 30, 1975 |
| Grant date | May 3, 1977 |
| Priority date | — |
| Expiry date | Oct 30, 1995 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D63/101
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A spiral wound reverse osmosis or ultrafiltration membrane cartridge has a central collection tube fabricated from a plurality of interlocking segments; the center segments are perforated and the segment at each end is imperforate. The side edges of the cartridge membrane leaves and the permeate transfer sheet are sealingly attached to the central collection tube by circumferential bands of glue located outboard of the juncture of the imperforate end segments with adjacent perforate center segments. Substantial fabrication economies result from injection molding the center segments as identical bodies from a single die; and injection molding the end segments also as identical bodies from a single die.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.