Coating processes – Vacuum utilized prior to or during coating
Patent
1979-10-22
1981-09-08
Lusignan, Michael R.
Coating processes
Vacuum utilized prior to or during coating
118 50, 427373, 4273898, C23C 1308, B05D 300, B05D 302
Patent
active
042884756
ABSTRACT:
A method and apparatus for impregnating a fibrous web is disclosed having a conveyor for advancing the fibrous web. The fibrous web having a first surface and a second surface. An applicator is provided for applying a foamed binder to the first surface of the fibrous web and the foamed binder seals the first surface of the web. A vacuum chamber is positioned adjacent the second surface of the web. The vacuum chamber contains a narrow slot adjacent the second surface of the web for applying a vacuum to the web. The vacuum acts upon the web to reduce the thickness of the web and to draw the foamed binder material into the web to impregnate the web.
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