Patent ID: 6866495

Claim:
An apparatus, comprising: at least one primary extrusion head; a preforming device; at least one auxiliary extrusion head; an auxiliary feeding channel; and an extrusion die, wherein the preforming device comprises: a primary preforming channel operatively connected to the at least one primary extrusion head, a preformer-holding drawer; and a preformer, wherein the preformer is operatively housed in the drawer, and wherein the primary preforming channel is formed between the drawer and the preformer, wherein the auxiliary feeding channel is operatively connected to the at least one auxiliary extrusion head, wherein the auxiliary feeding channel connects to the primary preforming channel, wherein a direction of the auxiliary feeding channel forms an angle between approximately 30° and 160° relative to a direction of the primary preforming channel, wherein the extrusion die is connected to the preforming device, wherein the extrusion die comprises an extrusion outlet, and wherein the auxiliary feeding channel connects to the primary preforming channel substantially near the extrusion outlet.