Patent ID: 9126751
Filing Date: 2015-09-08
Classification: B05B,B05C,B65D,F16K

Abstract:
1. A hot melt adhesive dispensing system, comprising: a nozzle assembly including an adhesive cut-off module, wherein the adhesive cut-off module is configured to cut-off a hot melt adhesive stream free of an angel hair formation by dispensing a non-adhesive liquid; a hot melt adhesive delivery system configured to deliver a hot melt adhesive to the nozzle assembly; and a liquid delivery system configured to deliver the non-adhesive liquid to the nozzle assembly; wherein the adhesive cut-off module includes a spool valve assembly including an adhesive chamber and a liquid chamber, wherein the adhesive chamber and the liquid chamber are two separate chambers divided by a wall therebetween, the spool valve assembly having an adhesive dispensing position and a liquid dispensing position, wherein the nozzle assembly dispenses the hot melt adhesive stream from the adhesive chamber in the adhesive dispensing position, and dispenses the non-adhesive liquid from the liquid chamber in the liquid dispensing position, wherein the hot melt adhesive stream is cut-off when the position of the spool valve assembly is changed from the adhesive dispensing position to the liquid dispensing position.