Patent · US Active

Web measurement device

US7847943B2 · kind B2 · utility

8Cited by

8References

19Claims

0Family size

Assignee

ABB AG · US

Inventors

Ake A. Hellstrom · Columbus, US
Rambod Naimi · Louth, IE
Michael O'Hora · Dundalk, IE

Key dates

Filing date	Aug 28, 2008
Grant date	Dec 7, 2010
Priority date	—
Expiry date	Mar 19, 2029

Classification

Technology area (CPC G)Physics
CPC primaryG01B2210/50
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

A sensor is provided that measures web caliper using optical and magnetic measuring devices. The optical measuring devices may employ a confocal chromatic aberration method to accurately determine the distance to the moving web and the magnetic devices may be ferrite core coil and target. Means of stabilizing a moving web are included for improving dynamic measurement accuracy.

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