Stock material or miscellaneous articles – Structurally defined web or sheet – Including variation in thickness
Patent
1994-05-31
1996-10-22
Lusignan, Michael
Stock material or miscellaneous articles
Structurally defined web or sheet
Including variation in thickness
83875, 427289, 427373, 4273898, B32B 328, B32B 330
Patent
active
055675042
ABSTRACT:
A glass fiber duct board has longitudinally extending, spaced-apart grooves in a major surface that facilitate the folding of the duct board into an air duct. The major surface, including the grooves, is coated with a polymeric latex coating to encapsulate glass fibers and dust within the surface of the duct board. The polymeric latex coating is applied to the surfaces of the grooves as a foam by application nozzles located downstream of groove cutting tools. The polymeric latex coating applied by the nozzles is distributed over the surfaces of the grooves and set to a predetermined thickness by wiper blades, located downstream of the nozzles, which have edge configurations complementary to the transverse configurations of the grooves being coated.
REFERENCES:
patent: 3875835 (1975-04-01), Roberts
patent: 4681722 (1987-07-01), Carter et al.
patent: 4781510 (1988-11-01), Smith et al.
patent: 4990370 (1991-02-01), Terry et al.
Coleman Robert R.
Matthews Kent R.
Morton Lowell K.
Schakel Eric G.
Lusignan Michael
Quinn Cornelius P.
Schuller International, Inc.
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