Patent ID: 6311899
Filing Date: 2001-11-06
Classification: B05B,B05C

Abstract:
A nozzle device for applying adhesive by spraying in a spiral spray pattern of adhesive fiber comprising:(a) a nozzle base having an adhesive supply hole at a center thereof and a plurality of pressurized air holes arranged concentrically with said adhesive supply hole,(b) an inverted truncated cone connected to an underside of said nozzle base, having at a center thereof an adhesive hole connected to said adhesive supply hole and located at an inner center side from lower ends of said plurality of pressurized air holes, whereby pressurized air flow from said plurality of pressurized air holes is rotated and flowed down along a circumferential surface of the inverted truncated cone,(c) a nozzle projection of partly cut away conical form or partly cut away tubular form connected to an underside of the inverted truncated cone, having at a center thereof an adhesive hole connected to the adhesive hole of the inverted truncated cone and a pair of opposed downward slanting surfaces whose upper side is a round shape having an area which is substantially equal to or less than that of the underside of the inverted truncated cone and whose underside is a non-circular shape having a minor axis in a direction where lower ends of the downward slanting surfaces exist and a major axis in a direction where the lower ends of the downward slanting surfaces do not exist, said opposed downward slanting surfaces converging relative to each other in a direction of the pressurized air flow, and(d) an adhesive exposing surface formed at a part of the downward slanting surface by exposing an adhesive hole at a tip portion of the downward slanting surfaces,whereby rotating pressurized air flow flowing down as it rotates along a circumferential surface of the truncated cone and around a circumference of the nozzle projection partially touches the downward slanting surfaces so as to deviate its rotating direction and to rotate a spiral spray pattern of adhesive fiber in elliptical form and also rotating pressurized air flow partially touches adhesive flowing down from the adhesive hole of the nozzle projection so as to stretch it preliminarily and to rotate the spiral spray pattern of adhesive fiber at high speed in elliptical form.