Coating processes – With pretreatment of the base – Heating or drying pretreatment
Patent
1997-12-18
1999-08-03
Beck, Shrive
Coating processes
With pretreatment of the base
Heating or drying pretreatment
427209, 427299, 427443, B05D 300
Patent
active
059322870
ABSTRACT:
A method of manufacturing roofing felts, cap sheets, base sheets and similar built-up roofing products from fibrous mats includes: supplying a roofing mat to a manufacturing process; moisturizing the roofing mat by applying steam or a liquid mist to one or both major surfaces of the roofing mat during the manufacturing process to increase the moisture content of the roofing mat and reduce the amount of hot bitumen accepted by the roofing mat during a coating operation; and applying a hot bitumen coating to one or both major surfaces of the roofing mat during the manufacturing process after the moisture content of the roofing mat has been increased by the moisturizing step.
REFERENCES:
patent: 3783000 (1974-01-01), Takase et al.
patent: 4107375 (1978-08-01), Iwasaki et al.
patent: 4873303 (1989-10-01), Blackwood et al.
patent: 5169690 (1992-12-01), Zimmerman et al.
Lemonier Byron James
Lundholm Gary Allen
Michelsen Theodore W.
Olson Brian Francis
Barr Michael
Beck Shrive
Johns Manville International Inc.
Touslee Robert D.
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