Colorant presentation for pad printing

Details Colorant presentation for pad printing Colorant presentation for pad printing

B - Operations, Transporting

41

K

B41K 3/54 (2006.01)

Patent

CA 2560962

The present invention provides systems and methods for providing colorant to a colorant cup apparatus that is adjacent to a pad printing cliche. The fluid colorant is fed from a colorant container through a feed conduit to the cup and an inline viscometer external to the colorant container measures the viscosity of colorant within the feed conduit. A control mechanism can dispense colorant solvent into the colorant container based upon a viscosity measurement performed by the inline viscometer . The disclosed systems, colorant cups and methods are useful in the preparation of tinted contact lenses.

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