Radioactive ray gauge

Details Radioactive ray gauge Radioactive ray gauge

1977-11-09

1980-06-17

Smith, Alfred E.

Radiant energy

Coded record and readers; invisible radiant energy type

250308, G01T 116, H01J 3900

Patent

active

042085810

ABSTRACT:
In a radioactive ray gauge system, a measuring head continuously detects the thickness of coated material on an advancing sheet. The head has a non-contact type sheet surface-to-head distance detector thereon. The distance detector continuously detects the distance so as to maintain the distance constant thereby eliminating error in the thickness measurement caused by sheet thickness variation, sheet-bending, warping or fluttering.

REFERENCES:
patent: 3499152 (1970-03-01), Hetenhouser

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