G - Physics – 01 – N
Patent
G - Physics
01
N
324/53
G01N 27/72 (2006.01) G01B 7/04 (2006.01) G01R 33/12 (2006.01)
Patent
CA 1074868
Title of the Invention APPARATUS FOR TESTING TUBE WALL THICKNESS ABSTRACT OF THE DISCLOSURE An apparatus for testing the wall thickness of a moving tube of plastics or other electrically non-conducting material being produced by an extruder, comprises an electrically conduct tive measurement body arranged is the moving tube, a ferromagnetic holding member which is arranged is the tube within effective range of a holding magnet located outside the tube and which has a tie connection to the measurement body to locate the measurement body axially within the effective range of a measuring sensor located outside the tube. The holding member and the measurement body may be introduced into the tube through a channel in the extruder head, shot into the tube from a forward. position, or inserted through an aperture cut in the tube wall. -1-
274691
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