Self-cleaning porosimeter
US4517825A · kind A · utility
1Cited by
9References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 24, 1982 |
| Grant date | May 21, 1985 |
| Priority date | — |
| Expiry date | Sep 24, 2002 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2015/086
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A high-speed dynamic porosimeter including a device for removing accumulated debris is disclosed. The porosimeter has an apertured surface, preferably curved, across which a web whose porosity is to be measured is drawn while suction is applied to the apertures. A pressure transducer monitors the pressure in a sensor line or chamber, which pressure varies as a function of the porosity of the web. A scraper blade scrapes debris from the apertured surface from time to time. Preferably, vacuum suction is also applied to a slot at the upstream side of the apertured surface to ensure a good seal between the web and the surface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.