Paper making and fiber liberation – Processes of chemical liberation – recovery or purification... – With washing
Patent
1997-12-04
2000-01-25
Chin, Peter
Paper making and fiber liberation
Processes of chemical liberation, recovery or purification...
With washing
2103803, 210402, 68196, 68139, 454 67, 8156, D21C 902, D06F 1700, B01D 3306, B08B 1502
Patent
active
060174161
ABSTRACT:
An improved hood enclosure for isolating wood pulp washing equipment from the ambient environment. The hood has a pair of end members, a pair of skirts along each side to connect to the end member together, and an upper spine also connected at each end to the end members. A pair of clamshell style doors are mounted to the spine along longitudinal hinge lines and are opened vertically. A plurality of access doors are positioned within the skirts, and a plurality of spray or shower pipes penetrate the hood through an end panel to deliver wash liquid to the internal wash drums positioned within the wash vat. Several sealing methods are incorporated to provide sealable access for the access doors, the clamshell doors, and access to the interior of the washing vat for the shower pipes. The clamshell doors abut a peripheral neoprene sealing gasket and are held against the gasket by their own weight. The access doors abut and enclose a raised comb on the hood skin and an elastomeric closure strap biases the access door against a neoprene gasket positioned along the contact area of the door against the raised comb, thereby sealing the door when closed. At the penetration point of the hood, the washer spray pipes are seated in a saddle flange on one side and a series of half portals correspondingly positioned with saddle flange portals on the other side.
REFERENCES:
patent: 2291463 (1942-07-01), Gerlach
patent: 3454970 (1969-07-01), Sutherland
patent: 4205541 (1980-06-01), Zucker
patent: 4545857 (1985-10-01), Wells
patent: 4616489 (1986-10-01), Wood et al.
Bonded Fiberglass Co.
Bush Kenneth M.
Chin Peter
Veal Robert J.
Walls Dionne A.
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