Method and apparatus for quantifying pigment dispersion...

Image analysis – Applications – Manufacturing or product inspection

Reexamination Certificate

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C356S445000

Reexamination Certificate

active

07639862

ABSTRACT:
An automated computer-controlled method and apparatus for measuring the quality or fineness of a pigment dispersion sample, comprising placing the pigment dispersion at the deep end of the tapered path of a Hegman gage block, placing the Hegman gage block in a holder in a motorized drawdown device that draws the scraper along the length of the tapered path at an angle and to at a contact pressure and at a controlled rate, thereby creating a tapered film sample of paint whose thickness tapers from a maximum thickness of 100 micrometers to a minimum thickness of zero. An illuminator assembly illuminates the sample with a substantially collimated light source at an intensity level and the light reflected from the sample is collected by a lens onto a photodetector array in a digital camera. After a time interval the camera acquires an image of the sample. The image is digitized and stored in a memory in the computer and then a portion of the image within a region of interest corresponding to the sample in the tapered path is analyzed to detect and count pigment agglomerates that protrude above the surface of the sample.

REFERENCES:
patent: 2626707 (1953-01-01), Whately
patent: 3573081 (1971-03-01), Dietz
patent: 4445365 (1984-05-01), Selby
patent: 4450095 (1984-05-01), Finlayson
patent: 4832984 (1989-05-01), Hasegawa et al.
patent: 5249029 (1993-09-01), Sommer et al.
patent: 5268749 (1993-12-01), Weber et al.
patent: 5341824 (1994-08-01), Fletcher et al.
patent: 5474844 (1995-12-01), Sato et al.
patent: 5773492 (1998-06-01), Ferguson
patent: 5811481 (1998-09-01), Boutier et al.
patent: 6055329 (2000-04-01), Mufti
patent: 6177486 (2001-01-01), Ferguson
patent: 6306931 (2001-10-01), Ferguson
patent: 6409567 (2002-06-01), Amey et al.
patent: 6696375 (2004-02-01), Welsh et al.
patent: 6721055 (2004-04-01), Hatfield et al.
patent: 7176329 (2007-02-01), Smith et al.
patent: 2002/0067485 (2002-06-01), Hatfield et al.
patent: 2002/0174804 (2002-11-01), Rodrigues et al.
patent: 2004/0095573 (2004-05-01), Tsai et al.
CL2426 PCT International Search Report.
ASTM Standard D 1210-96—“Standard Test Method for Fineness of Dispersion of Pigment-Vehicle Systems by Hegman-Type Gage”.

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