Hot melt foam adhesive system

Details Hot melt foam adhesive system Hot melt foam adhesive system

B - Operations, Transporting

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B05C 11/00 (2006.01) B01F 5/14 (2006.01) B05C 5/04 (2006.01) B29B 7/74 (2006.01) B29B 13/02 (2006.01)

Patent

CA 1208003

HOT MELT FOAM ADHESIVE SYSTEM Abstract of the Disclosure A hot melt foam adhesive system including a gear pump wherein gas is mixed under pressure into the molten adhesive and is driven into solution with the adhesive. The gas is supplied to the pump via a one-way check valve operative to prevent the back flow of molten adhesive to a gas flow control valve, regu- lator, and gauge. The check valve is positioned above the level of the pump so that molten adhesive cannot flow by gravity into the check valve. The check valve is so constructed that it is biased into a closed position by a spring on the gas side of the valve so that adhesive cannot collect around and foul the spring of the valve.

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