G - Physics
01
B
G01B 15/02 (2006.01) G01B 15/00 (2006.01) G21F 5/02 (2006.01)
Patent
CA 2132454
A nuclear gauge (7) for making measurements of travelling webs (11) in continuous sheet-making processes includes an enclosure (20), an encapsulated nuclear source (28), and a wheel-like member (10) mounted in the enclosure means for carrying the encapsulated nuclear source between two angularly-displaced positions. The first of the angularly-displaced positions is the position whereat the encapsulated nuclear source makes measurements of a web that travels past the gauge, and the second position is the location whereat tile encapsulated nuclear source faces a sidewall of the enclosure means at a location remote from the first position. The nuclear gauge also has an aperture (16) which is formed through the enclosure for providing a window through which the encapsuled nuclear source, when located in the first position, can emit radiation onto a web that travels past the window.
Axelrod Steve
Boissevain Mathew
Goss John D.
Hegland Philip M.
Wiley Scott C.
Blake Cassels & Graydon Llp
Measurex Corporation
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