Passive inline membrane degasser and liquefier
US5269836A · kind A · utility
1Cited by
20References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 28, 1992 |
| Grant date | Dec 14, 1993 |
| Priority date | — |
| Expiry date | Aug 28, 2012 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D19/0078
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The present invention describes a passive membrane degasser device in which solid chunks of photographic materials (15) are pumped past a hydrophobic membrane (10). Air from in between the chunks is forced through the membrane by pump pressure including a screw auger (11) and a vacuum (12) on the outer side of the membrane. The solid chunks of photographic material (15) are then transferred to a liquefier where conventional ultrasonic deaeration is performed. This device causes no sensitometric problems and permits using a continuous liquefaction system without the use of a centrifugal vacuum degasser.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.