Method and apparatus for inspection by radioactive gage of a mov

Details Method and apparatus for inspection by radioactive gage of a mov Method and apparatus for inspection by radioactive gage of a mov

1983-12-28

1986-05-06

Howell, Janice A.

X-ray or gamma ray systems or devices

Specific application

Absorption

378 61, 2503581, G01N 2300

Patent

active

045876673

ABSTRACT:
A strip (B), generally trapezoidal in cross-section, traverses a measurement plane at the level of a line of passage (L). Two identical collimated radioactive sources (120, 121) are disposed to provide a substantially constant flux of radiation at the level of the line of passage (L). An elongate ionization chamber (310) receives at least all the radiation traversing the strip. The variations in the output signal of the ionization chamber indicate the presence in the strip of possible localized air inclusions or overweights.
The invention can be applied in particular to the inspection of rubber strip intended for the manufacture of tires.

REFERENCES:
patent: 3125680 (1964-03-01), Schlaechter
patent: 3852600 (1974-12-01), Faulkner et al.
patent: 4047036 (1977-09-01), Smith et al.
"An Archiv fur Technisches Messen".
Robert C. McMaster--"Nondestructive Testing Handbook", 1959--vol. 1--pp. 1-33.

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