The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 29, 2001
Filed:
May. 12, 1999
Edwin X. Graf, Menasha, WI (US);
Voith Sulzer Paper Technology North America, Inc., Appleton, WI (US);
Abstract
A method and apparatus for measuring thickness of a fiber material during manufacture of the fiber material, especially paper in a paper-making machine, comprises a gamma radiation transceiver in communication with a processing/control system. The gamma radiation transceiver is placed at a points along the production path of the web of paper being produced and liberates gamma radiation towards the fiber material. Backscatter of gamma radiation is received by the gamma transceiver also which generates corresponding signals that are received by the processing/control system. The processing/control system processes the signals to determine a thickness profile along a cross-section of the web. The processing/control system may be in communication with or considered a subset of a main processing/control system for the paper-making machine. A gamma radiation shield may be used with the gamma transceiver and is mounted on the side of the paper web opposite the gamma transceiver. The gamma transceiver preferably includes a cover made from a gamma radiation abating material that is selectively positionable over the gamma radiators. Several gamma transceivers may be positioned along the production path of the web of paper and in communication with the processing/control system in order to provide thickness measurement at various points of the web.