Measuring and testing – With fluid pressure – Porosity or permeability
Patent
1988-12-21
1990-03-06
Williams, Hezron E.
Measuring and testing
With fluid pressure
Porosity or permeability
15345, G01N 1508, A47L 514
Patent
active
049055003
ABSTRACT:
A surface cleaner that may take the form of a surface strength tester or lint remover for paper wherein lint or like material is freed from the surface of a paper web travelling past the cleaner. The cleaner includes a material pick-up head having an air bearing surface through and along which an air stream is passed to generate an air bearing and a significant negative air pressure between the bearing surface and web. The negative pressure tends to hold the web and air bearing surface in close proximity to each other and causes lint material to be freed from the web surface. The freed lint material is carried in the air stream. A vacuumed pick up has its inlet opening located relative to the air bearing surface such that material freed and carried in the air stream is sucked into the inlet. If the cleaner is used as a tester the pickup head may extend over only a small portion of the web surface and the amount of material measured thereby to provide an indication of the linting propensity of the web. If the cleaner is to clean the surface of the web the pickup head will extend over substantially the full width of the web.
REFERENCES:
patent: 2919573 (1960-01-01), Berkley et al.
patent: 3248930 (1966-05-01), Speegle et al.
patent: 3775806 (1973-12-01), Olbrant et al.
patent: 4385517 (1983-05-01), Sorce et al.
patent: 4594748 (1986-06-01), Warfvinge
patent: 4672841 (1987-06-01), Schuster et al.
patent: 4730481 (1988-03-01), Schlipf
`The Characterization of Offset Lint and the Testing of Offset Papers` by Browning and Parker from the Proceedings of the Symposium on Mechanical Pulp, Jun. 22-24, 1970 Oslo.
MacMillan Bloedel Limited
Roskos Joseph W.
Williams Hezron E.
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