Apparatus for the detection of holes and plugged spots

Details Apparatus for the detection of holes and plugged spots Apparatus for the detection of holes and plugged spots

1996-09-18

1998-03-10

Chin, Peter

Paper making and fiber liberation

Apparatus

Measuring, testing, inspecting, indicating or illuminating

162275, 162198, 73 38, 73 377, G01N 1508, D21F 706

Patent

active

057257370

ABSTRACT:
The invention relates to an apparatus for detecting plugged sites and holes and for measuring of the water permeability properties of pervious machine fabrics. Plugged sites in a permeable fabric are detected by sensing water pressure pulses occurring in the nozzle at the moment when a stream of water flowing through the nozzle contacts a plugged site on a fast running fabric. The apparatus can be used on-line to simultaneously detect plugged sites and holes on a moving pervious fabric while monitoring its water permeability properties.

REFERENCES:
patent: 3577767 (1971-05-01), Stedile
patent: 3762211 (1973-10-01), Poulsen
patent: 4385517 (1983-05-01), Sorce et al.
patent: 4401147 (1983-08-01), Beck et al.
patent: 4555934 (1985-12-01), Freeman et al.
patent: 4880499 (1989-11-01), Pikulik
patent: 4892621 (1990-01-01), Eskelinen
patent: 5349845 (1994-09-01), Blom
patent: 5412976 (1995-05-01), Vogt

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