Apparatus for determining the thickness of layer supports

Details Apparatus for determining the thickness of layer supports Apparatus for determining the thickness of layer supports

1988-08-15

1990-05-01

Hannaher, Constantine

Radiant energy

Invisible radiant energy responsive electric signalling

Ultraviolet light responsive means

250339, 250341, G01J 100

Patent

active

049221124

ABSTRACT:
An apparatus for on-line measurement of the layer thicknesses of moving flexible layer supports over the whole width of the web by photoelectric means is described. A light source (2) which emits UV light passes a beam of parallel or slightly converging rays through the layer support (1), the transmitted light is registered by a photoelectric receiver (3) which is sensitive to UV light and the registered signal is transmitted to an electronic interpretation mechanism (5) from which the layer thickness is determined and recorded on-line once calibration has been carried out (FIG. 1).

REFERENCES:
patent: 3397315 (1968-08-01), Johnston
patent: 3869211 (1975-03-01), Watanabe et al.
patent: 3956630 (1976-05-01), Mellows
patent: 4008388 (1977-02-01), McLafferty
patent: 4105293 (1978-08-01), Aizenberg et al.
patent: 4199682 (1980-04-01), Spector et al.
patent: 4511800 (1985-04-01), Harbeke et al.
patent: 4549079 (1985-10-01), Terasaka et al.
patent: 4766315 (1988-08-01), Hellstrom et al.

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