Paper making and fiber liberation – Processes and products – Mineral fiber
Patent
1973-11-21
1976-07-06
Lindsay, Jr., Robert L.
Paper making and fiber liberation
Processes and products
Mineral fiber
162181D, 162218, 162221, 162222, 162228, D21F 1100
Patent
active
039680045
ABSTRACT:
A dilute slurry that includes mineral wool fibers, a clay binder, other binders and a flocculent is introduced into a forming tank at several elevations and with sufficient velocity to circulate toroidally therein. A mandrel having the desired configuration of one surface of the shaped article is lowered into the forming tank and rotated at a preselected speed. Vacuum is applied to the rotating mandrel and a substantially uniform layer of solids is deposited on the outer surface of the mandrel while the filtrate is withdrawn through an internal portion of the mandrel and conveyed to a filtrate recovery tank. After a layer of a preselected thickness is deposited on the outer surface of the mandrel, the mandrel is removed from the forming tank and vacuum is maintained on the mandrel to reduce the water content of the accreted fibers to between about 40 to 65% by weight water. Thereafter, while on the mandrel, the accreted fiber-shaped article is trimmed to provide an outer surface of a desired configuration. The trimmed article is thereafter sprayed with a coating material while vacuum is maintained on the mandrel so that the coating material penetrates the surface of the shaped article. The shaped article is thereafter removed from the mandrel and trimmed to provide a fibrous shaped article having a desired configuration and thickness.
REFERENCES:
patent: 1551257 (1925-08-01), Little
patent: 2124745 (1938-07-01), Morgan
patent: 2383066 (1945-04-01), McDermott
patent: 2700326 (1955-01-01), Curtis
patent: 2732295 (1956-01-01), Hollenberg
patent: 3028911 (1962-04-01), De Lear
patent: 3093533 (1963-06-01), Hella et al.
patent: 3585107 (1967-05-01), Williams
Coffey Fred Simms
Johnson Howard Beattie
Weaver Harold Lloyd
Chin Peter
Lindsay, Jr. Robert L.
Pittsburgh Corning Corporation
Price, Jr,. Stanley J.
LandOfFree
Process for making a shaped fibrous article by a vacuum forming does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Process for making a shaped fibrous article by a vacuum forming , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for making a shaped fibrous article by a vacuum forming will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1531893