Method and apparatus for measuring contaminating impurities in p

Details Method and apparatus for measuring contaminating impurities in p Method and apparatus for measuring contaminating impurities in p

1994-12-27

1996-04-30

Lacey, David L.

Paper making and fiber liberation

Processes and products

With measuring, inspecting and/or testing

162262, 162263, 356 36, G01N 2189, D21F 700, G01B 1128

Patent

active

055121373

ABSTRACT:
A method and apparatus for detecting impurities in raw pulp slurry at high precision using samples on-line. The pulp slurry is passed through a flat mesh wire to accumulate pulp fiber on the wire surface and prepare a wet mat, after which the surface of the wet mat is detected by a CCD camera in a catoptric system while pressed against a flat transparent plate, and the image is processed to measure the area of impurities per unit area of the wet mat.

REFERENCES:
patent: 4897159 (1990-01-01), Bone et al.

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