Filter cartridges and methods and components for making them
US4501663A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 24, 1981 |
| Grant date | Feb 26, 1985 |
| Priority date | — |
| Expiry date | Jul 24, 2001 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D65/003
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Novel membrane filter units are disclosed which are adapted for stacking and bonding into integral, disposable cartridges, optionally including an integral disposable housing. The units comprise a thin plastic support having flat membranes permanently bonded to their upper and lower surfaces. The support has a central opening, a sealing rim, and on each surface, inner and outer circumferential lands and intervening ribs or similar projections, the membranes being bonded and sealed to the lands and ribs. Each support surface adjacent the central opening has circumferential coupling and spacing means for bonding stacked units together in spaced relation. A novel method for bonding a membrane to a support is also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.