G - Physics – 01 – B
Patent
G - Physics
01
B
33/194, 18/719
G01B 3/22 (2006.01) B29C 47/92 (2006.01) G01B 3/00 (2006.01) G01B 5/00 (2006.01)
Patent
CA 1268624
ABSTRACT A DEVICE FOR MEASURING THE WALL THICKNESS OF AN EXTRUDED TUBULAR SECTION DURING EXTRUSION, EXTRUSION APPARATUS WITH SUCH A DEVICE AND EXTRUDED TUBULAR SECTION OBTAINED BY USING SAID DEVICE A device for measuring the wall thickness of an extruded tube 3 by means of ultrasonic pulses comprises a tube wall thickness measuring instrument 7 being rotatable about the circumference of the tube 3 and being connected to an arm 9 extending in a plane perpendicular to the tube 3. The arm 9 is hingedly 11 connected in said plane to a ring 8 perpendicular to the axis of the tube and concentrically about the tube 3. The arm 9 bears a weight 10 outside said ring 8. An adjustable pressure element 12, such as a spring or preferably a two way operable air cylinder, acts upon the arm 9. The measuring element may engage two supporting faces 14, the angle between the supporting faces being adjustable. Furthermore a detachable fixing element, such as a magnet 13, engages the arm 9 so that the arm can be disconnected form the magnet and may be moved from the plane perpendicular to the tube 4. The wall thickness is measured only by means of one echo coming from the inner wall of the tube when an ultrasonic pulse emitted by the device 7 hits said wall.
504986
Gowling Lafleur Henderson Llp
Wavin B.v.
LandOfFree
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