Radiometric measuring of thin fluid films
AssigneeMicroFluid AB
InventorLeif Cronvall
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Abstract
The present invention relates to radiometric measurement of a thin fluid film using absorption of IR radiation. At least one IR radiator is directed to send signals to an IR detector via a bed on which the fluid film is placed. The IR detector is set to receive IR radiation in a band around a characteristic absorption band of the fluid of the fluid film. The invention is developed for printing presses, where the thickness of fountain solution on the printing plate and the proportion of printing ink in an emulsion of printing ink and fountain solution may be controlled.
Claims15
A method for radiometric measurement of thin fluid films where absorption of IR radiation is used, the method comprising:
- directing at least one IR radiator to send signals to a connected IR detector by means of the fluid film to be measured, wherein the method is used for a printing press and the fluid film comprises fountain solution or an emulsion of fountain solution and printing ink, received on a printing plate;
- wherein several points of measurement are monitored and the power of IR radiation in at least one of the points of measurement is set in relation to a specific printing ink.
A device for radiometric measurement of thin fluid films where absorption of IR radiation is used, comprising:
- at least one unit comprising an IR radiator and an IR detector;
- a signal processing system and other support systems provided at a printing press, wherein the at least one unit measures on a non-printing area and a printing area of the printing plate;
- a control unit for receiving information from further sensors or meters;
- wherein several points of measurement are monitored and the power of IR radiation in at least one of the points of measurement is set in relation to a specific printing ink.
Dependencies are inferred from the claim text.