Dielectric slit die for in-line monitoring of liquids processing
US7143637B1 · kind B1 · utility
Inventors
Key dates
| Filing date | Apr 8, 2004 |
| Grant date | Dec 5, 2006 |
| Priority date | — |
| Expiry date | Apr 8, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2011/006
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The dielectric slit die is an instrument that is designed to measure electrical, rheological, ultrasonics, optical and other properties of a flowing liquid. In one application, it is connected to the exit of an extruder, pump or mixing machine that passes liquefied material such as molten plastic, solvents, slurries, colloidal suspensions, and foodstuffs into the sensing region of the slit shaped die. Dielectric sensing is the primary element of the slit die, but in addition to the dielectric sensor, the die contains other sensing devices such as pressure, optical fiber, and ultrasonic sensors that simultaneously yield an array of materials property data. The slit die has a flexible design that permits interchangeability among sensors and sensor positions. The design also allows for the placement of additional sensors and instrumentation ports that expand the potential data package obtained.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.