Variable length encapsulating pressure drop tester
US4069704A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 25, 1976 |
| Grant date | Jan 24, 1978 |
| Priority date | — |
| Expiry date | May 25, 1996 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01M3/02
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An apparatus for testing tobacco smoke filter rods and similar articles of varying lengths for pressure drop across the opposed ends of a rod encapsulated in an air-impervious sleeve comprising a housing having a longitudinal bore, a rod receptacle having an air-impervious encapsulating sleeve mount therein, slideably mounted in the bore, a hollow rod stop stationarily mounted in the bore and extending into the sleeve of the rod receptacle, means for expanding the air-impervious sleeve, vacuum means communicating with the hollow interior of the rod stop and means for measuring the pressure drop interposed between the vacuum means and the hollow rod stop.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.