Thickness measuring apparatus for non-metallic sheet-shaped bodi

Details Thickness measuring apparatus for non-metallic sheet-shaped bodi Thickness measuring apparatus for non-metallic sheet-shaped bodi

1980-09-09

1982-01-19

Punter, William H.

Optics: measuring and testing

By polarized light examination

With light attenuation

250560, 356381, G01B 1106, G01B 1114

Patent

active

043113923

ABSTRACT:
A thickness measuring apparatus for non-metallic sheet-shaped bodies formed of rubber, plastic or the like which is simple in construction and small in size and can accurately measure the thickness of the non-metallic sheet-shaped body irrespective of high temperature change. It comprises a sheet position detecting mechanism including a light detector for receiving an image of the surface of the non-metallic sheet-shaped body and scanning the image and operative to detect the surface position of the sheet-shaped body on the basis of the output from the light detector. A roll position detecting mechanism detects that surface position of a metal roll which lies near the surface position of the sheet-shaped body to be detected. A processing mechanism calculates the thickness of the sheet-shaped body on the basis of the surface positions of the sheet-shaped body and the metal roll.

REFERENCES:
patent: 2773412 (1956-12-01), Huck
patent: 3667283 (1972-06-01), Takenaka et al.
patent: 3697867 (1972-10-01), Kleesattel
patent: 3713739 (1973-01-01), Zarezankov et al.
patent: 4078171 (1978-03-01), Stauffer
patent: 4207003 (1980-06-01), Niemiro
patent: 4226536 (1980-10-01), Dreyfus et al.

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