Patent ID: 6238484
Filing Date: 2001-05-29
Classification: B05B,B05C,Y10T

Abstract:
A reactive hot-melt adhesive coating machine comprising, in combination:at least one adhesive applicator for applying a reactive hot-melt adhesive, said reactive hot-melt adhesive being molten in a heated condition and curable when reacting with moisture in ambient air;an adhesive storage tank for storing said reactive hot-melt adhesive in a molten state;an adhesive feeding passage feeding said reactive hot-melt adhesive in a molten state from said adhesive storage tank to said at least one applicator;a cleaning fluid and a cleaning fluid storage tank for storing said cleaning fluid which has a characteristic of not being reactive with said reactive hot-melt adhesive in a molten state to cure said reactive hot-melt adhesive and is not curable when reacting with ambient air or moisture in the ambient air at a normal temperature;a cleaning fluid feeding passage connected to said adhesive feeding passage through a change-over valve for feeding said cleaning fluid from said cleaning fluid storage tank to said adhesive feeding passage; andsaid change-over valve having a first position for allowing said reactive hot-melt adhesive to be fed to said at least one applicator through said adhesive feeding passage while preventing said cleaning fluid from being fed from said cleaning fluid feeding passage to said adhesive feeding passage when issuing said reactive hot-melt adhesive out of said at least one applicator, and a second position for preventing said reactive hot-melt adhesive from being fed to said at least one sprayer through said adhesive feeding passage while allowing said cleaning fluid to be discharged out of said at least one when cleaning said at least one sprayer.