System for joining ends of rubber strips to supply an extruder

A system for joining ends of two or more rubber strips selected in accordance with a predetermined rubber mixture recipe in order to feed at least one extruder with a complex strip of rubber material made from the joined rubber strips, the system comprising:

• at least one conveyor that transports the rubber strips from an inlet of the system to an outlet of the system;
• a frame that operationally supports the conveyor to allow the continuous transport of the rubber strips and to allow the simultaneous joining of the ends of the rubber strips fed to the system;
• and
• a roller system that joins the ends of the rubber strips, the roller system comprising at least one upper roller and one lower roller, each roller having a center through which an axis of rotation of the roller extends and each roller having a cylindrical body of predetermined diameter that extends perpendicularly and rotates about its axis of rotation with respect to the frame that supports the roller system, the two rollers being disposed such that the two axes of rotation remain in the same plane with the axes of rotation parallel to one another, and the upper roller having a toothed surface along which a length of contact is established between a first fed rubber strip and the toothed surface while the first fed rubber strip passes through the roller system, the toothed surface comprising a plurality of teeth disposed consecutively along a common axis defined with respect to two opposite ends of the cylindrical body of the upper roller.