Patent ID: 8707891
Filing Date: 2014-04-29
Classification: B05C,Y10T

Abstract:
1. A spreading head for spreading at least a first adhesive and a second adhesive onto a substrate, comprising: a body for conveying said first adhesive and said second adhesive, two or more ducts formed within said body for introducing in said ducts said first and second adhesives, said ducts being mutually separate ducts such that said first and second adhesives are introduced mutually separately in said ducts, each duct being connected to a plurality of feed channels formed within said body for conveying said first and second adhesives to a plurality of extrusion chambers formed on an upper surface of said body, said plurality of feed channels exiting from each respective duct and being distributed and spaced along a longitudinal extension of each respective duct, and said plurality of feed channels being connected in output to said extrusion chambers by a plurality of valves which allow to selectively feed through said plurality of feed channels into said extrusion chambers said first and second adhesives from said ducts, an abutment element for said first and second adhesives which exit from said extrusion chambers being connected to said mutually separate ducts and being arranged at said upper surface of said body, said plurality of extrusion chambers comprising at least two extrusion chambers that are arranged mutually laterally adjacent with respect to a width of said body, said two mutually laterally adjacent extrusion chambers being connected with respective ones of said feed channels such that said first and second adhesives introduced mutually separately in said mutually separate ducts also being capable of exiting mutually separately from said two mutually laterally adjacent extrusion chambers so as to obtain at least two layers of adhesive which are arranged laterally mutually adjacent on said substrate and which include said first adhesive which is arranged laterally mutually adjacent to said second adhesive on said substrate.