Patent ID: 8109229

Claim:
A spreading head for spreading adhesives onto a substrate, comprising: an extrusion tool in fluid communication with at least a first adhesive and a second adhesive for application onto said substrate; a body for conveying said first adhesive and said second adhesive to said extrusion tool; 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; for each respective duct of said ducts, a plurality of feed channels formed within said body and exiting from each respectively duct and distributed and spaced along a longitudinal extension of each respective duct, and said plurality of feed channels connected in output to said extrusion tool by a plurality of valves which allow to selectively feed through said plurality of feed channels into said extrusion tool said first and second adhesives from said ducts; and a plurality of extrusion channels comprising at least two extrusion channels that are arranged mutually laterally adjacent in said extrusion tool with respect to a width of said extrusion tool, said two mutually laterally adjacent extrusion channels being connected with respective ones of said feed channels such that said first and second adhesives introduced mutually separately in said two mutually separate ducts also being capable of exiting mutually separately from said two mutually laterally adjacent extrusion channels 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.