Coating processes – Interior of hollow article coating – Removing excess coating material
Patent
1994-08-31
1995-10-24
Beck, Shrive
Coating processes
Interior of hollow article coating
Removing excess coating material
427239, 427443, 138145, B05D 722, B05D 118, F16L 9147
Patent
active
054608520
ABSTRACT:
A method of coating a corrugated pipe includes preparing an asphalt composition having a polymer constituent within the range of from about 3 to about 20 percent by weight, the composition having a softening point within the range of from about 180.degree. F. to about 250.degree. F. and a viscosity at a temperature of 360.degree. F. within the range of from about 600 to about 4000 cps, heating the asphalt composition to a temperature within the range of from about 340.degree. F. to about 390.degree. F. and coating the corrugated pipe by positioning at least a portion of the corrugated pipe in the heated asphalt composition for a time sufficient for the corrugated pipe to reach a temperature of at least 150.degree. F. The coated pipe is then removed from the asphalt composition for cooling.
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Janicki Richard T.
Keating Jay W.
Beck Shrive
Gegenheimer C. Michael
Gillespie Ted C.
Owens--Corning Fiberglas Technology, Inc.
Parker Fred J.
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