Patent ID: 7052267

Claim:
An extrusion device for manufacturing a product based on a rubber mix, comprising: a drivable rotary roller having an external surface and an axis of rotation; a vault partially circumferentially covering the external surface of the roller and having an internal surface facing the external surface of the roller and forming an air gap therebetween, the internal surface of the vault carrying a plurality of projecting threads which delimit with the external surface of the roller a zone forming a chamber for plasticization of the rubber mix, at least two of the threads extending axially of the roller; an inlet orifice for introducing the rubber mix into the air gap between the roller and the vault; and an extrusion orifice spaced circumferentially from the inlet orifice, the extrusion orifice defining the profile of the product, the extrusion orifice formed by and between the roller's external surface and a wall facing the roller's external surface; the internal surface of the vault only partially circumscribing the external surface of the roller and not extending circumferentially past the extrusion orifice.