IMPROVEMENTS IN OR RELATING TO THE PRODUCTION OF SHEET MATERIALS
Patent
·
OSTI ID:4840760
A radiometric gage is designed for measuring the weight per unit area of thin films, e.g., rubber sheets. The gage comprises two sources of beta or gamma radiation, the first positioned to irradiate the feed material before it passes through the calendar and the second positioned to irradiate the worked material. Ionization chambers detect the scattered radiations, and the ionization current from the second source is compared with that from the first source which, being derived from a material of thickness greater than saturation thickness, is determined solely by the material composition. The gage may be used to maintain the worked material at a constant thickness. (D.L.C.)
- Research Organization:
- Originating Research Org. not identified
- NSA Number:
- NSA-15-030937
- OSTI ID:
- 4840760
- Report Number(s):
- GB 877685
- Country of Publication:
- United Kingdom
- Language:
- English
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