Paper making and fiber liberation – Processes and products – Non-fiber additive
Patent
1974-09-20
1978-10-03
Bashore, S. Leon
Paper making and fiber liberation
Processes and products
Non-fiber additive
162175, 162181C, D21D 300
Patent
active
041182731
ABSTRACT:
Perlite insulation board is produced on a rotary vacuum forming machine utilizing an aqueous slurry containing ultrafine perlite particles. The fine perlite particles slow down the rate of stock deposition on the facing wire of the rotary vacuum former, and permit the rotary vacuum former to operate at a desirable forming speed.
REFERENCES:
patent: 2971878 (1961-02-01), Heilman et al.
patent: 3042578 (1962-07-01), Denning
patent: 3701672 (1972-10-01), Ruff
Casey, "Pulp & Paper", vol. II, (1960), p. 957.
MacDonald, "Pulp & Paper Manufacture Control, Secondary Fib., Struct. Board," (1969) p. 427, vol. II.
Godin Gilbert
Norgard Fred C.
Bashore S. Leon
Chin Peter
Johns-Manville Corporation
Kelly Joseph J.
Krone Robert M.
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