EP0046664A1 — Extrusion nozzle assembly and hot melt adhesive dispenser incorporating same

USPTO Abstract

An extrusion nozzle (19) adapted to be removably secured to one end of a hot melt adhesive dispenser (10), which end terminates in a heated flat metal surface (32) having an outlet passage (14) therein, characterised in that the extrusion nozzle comprises, a unitary heat insulative plastics holder (20) having an axial passage (25) therethrough, the holder having threaded fastener means (26) formed thereon for removably securing the holder to said end of the dispenser, a heat transmitting metal insert (21) fixedly secured within the axial passage of the holder, the insert having an axial passage (23) extending therethrough terminating in an outlet orifice (24), the insert having a flat end surface (30) remote from the outlet orifice adapted to be placed in metal to metal surface contact with the flat end surface (32) of the dispenser when the holder is secured onto the dispenser, and a resilient seal (22) contained within the holder surrounding the flat end surface of the insert, the seal being operable to form a liquid tight seal between the nozzle and dispenser when the nozzle is secured onto the dispenser.