Patent ID: 6723194
Filing Date: 2004-04-20
Classification: B29C,B29D,B65H

Abstract:
A method for wrapping a rubber strip around a forming drum, with the help of a rubber strip wrapping apparatus comprising an injection device operative for extruding an unvulcanized rubber strip from an extrusion outlet and a guide roll device connected to said injection device and having a guide roll rotatable about a guide roll axis and movable to and between an extended state and a retracted state, relative to the injection device the method comprising the steps of:extruding said unvulcanized rubber strip from said extrusion outlet of said injection device; providing said extruded unvulcanized rubber strip directly from said extrusion outlet to said guide roll; pressing said rubber strip by said guide roll, when said guide roll is in the extended state, against said forming drum under tension, said guide roll and said extrusion outlet of said injection device disposed apart from one another at a length defining a space therebetween, the space sized to receive overshoot amounts of the extruded rubber strip while extruding the unvulcanized rubber strip; rotating said forming drum in synchronism with extrusion of said rubber strip so that said guide roll is driven when in the extended state; and wrapping the rubber strip guided by said guide roll around said forming drum while extruding the unvulcanized rubber strip.