On-line web filtration efficiency test method

Details On-line web filtration efficiency test method On-line web filtration efficiency test method

1991-12-20

1993-04-20

Williams, Hezron E.

Measuring and testing

With fluid pressure

Porosity or permeability

73 377, G01N 1508

Patent

active

052032019

ABSTRACT:
An apparatus and method for measuring the filtration efficiency of a moving air-permeable web. The apparatus includes a sampling head with an upstream head and a downstream head disposed on opposite sides of the moving web and spaced apart to define a path for web travel. Particle laden air from the upstream head passes through the moving web and is collected in the downstream head where a sampling probe is disposed to collect filtered air for efficiency measurements. The method can be practice on-line in the media manufacturing process to continuously monitor the filtration characteristics and if necessary change the process condition to maintain the filtration characteristics within design parameters.

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patent: 4656865 (1987-04-01), Callan
patent: 4676092 (1987-06-01), Tuttle
patent: 4686848 (1987-08-01), Casselberry et al.
patent: 4875360 (1989-10-01), Ziemer
patent: 5081863 (1992-01-01), Reid

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