Process and apparatus for measuring optical parameters on liquid media
AssigneeE. I. Du Pont de Nemours and Company
InventorHans-Hendrik Hustert
Life of this patent
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Abstract
Process and apparatus for measuring optical, especially calorimetric, parameters on liquid, colored media, especially on wet lacquers, in which the liquid, colored medium is applied to a continuously moving, cylindrical support, a film of the liquid, colored medium forms on the continuously moving, cylindrical support, and optical, especially calorimetric, parameters are measured on the film of the liquid, colored medium.
Claims10
A process for measuring the optical parameters of a colored liquid lacquer which comprises the following steps:
- 1) applying the colored liquid lacquer from a container having a base with a slot like opening continuously to a rotating cylindrical support whereby a thin uniform film of the colored lacquer is formed on the cylindrical support;
- 2) rotating the film on the cylindrical support before a conventional optical measuring device whereby the optical measuring device measures the optical properties of the colored liquid lacquer, wherein the optical properties measured are brightness or colorimetric parameters or both.
An apparatus for measuring the optical parameters of a colored liquid lacquer, comprising:
- a rotatable cylindrical support;
- a container for holding colored liquid lacquer and having a slot-like opening wherein the colored liquid lacquer is applied as a film to the rotatable cylindrical support;
- a drive device connected to the rotatable cylindrical support that continuously rotates the cylindrical support;
- an optical device for measuring brightness or colorimetric parameters or both;
- and
- optionally, elements for connecting the cylindrical support and the container.
Dependencies are inferred from the claim text.