Stock material or miscellaneous articles – Structurally defined web or sheet – Nonplanar uniform thickness material
210150, 261 94, 261 95, 261DIG72, 428182, 428332, B05D 312
A spherical packing element for biological film processes which is formed of a flat circular base plate having a central, throughgoing opening therein, a flat and imperforate disk reinforcing plate extending along the opening and lying in a plane perpendicular to the base plate and a plurality of spaced apart, imperforate and mutually parallel circular lamellae perpendicular to both plates, traversing the opening, and spaced apart in the direction of the diameter. The packing element has a surface area of at least 250 m.sup.2 /m.sup.3, and wall thickness of the plates and lamellae are 0.1-2 mm.
patent: D232236 (1974-07-01), La Borde
patent: D232237 (1974-07-01), La Borde
patent: 2212932 (1940-08-01), Fairlie
patent: 3825119 (1974-08-01), Rost
patent: 4425285 (1984-01-01), Shimoi et al.
patent: 4554114 (1985-11-01), Guen et al.
patent: 4668442 (1987-05-01), Lang
"Hungaria" Muanyagfeldolgozo Vallalat
Lesmes George F.
Melyepitesi Tervezo Vallalat
Monroe James B.
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