Patent · US Active

Determination of basis weight of a material web using a microwave sensor, whereby the distance between the material web and the surfaces of the microwave sensor is being adjusted to a constant value by air cushions

US9279713B2 · kind B2 · utility

0Cited by

12References

17Claims

0Family size

Assignee

Voith Patent GmbH · DE

Inventors

Thomas Ischdonat · Giengen an der Brenz, DE
Ingolf Cedra · Heidenheim, DE
Oliver Kaufmann · Augsburg, DE

Key dates

Filing date	Jun 14, 2013
Grant date	Mar 8, 2016
Priority date	—
Expiry date	Jul 3, 2034

Classification

Technology area (CPC G)Physics
CPC primaryG01N33/346
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

A device for determining the weight per unit area of a moving material web, in particular a fibrous material web includes at least one microwave sensor that has an element for coupling the microwaves and a reference element. The coupling element and the reference element are located at a distance from one another in such a way that the material web can be moved therebetween. At least one microwave sensor element, the coupling element and/or the reference element can be moved such that the distances between the material web and the elements can be adjusted for or during the measurement of the moving material web.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.