Patent ID: 8622200

Claim:
Feeding device for feeding bands of materials including a lower base band ( 1 ) and an overlying band ( 2 ) that is longer than the lower base band and that is bound at both ends thereof to the lower base band in a direction transverse to a direction in which the bands are fed, the feeding device comprising a driving roller (R 1 ) and a rubber pressure roller (R 2 ), wherein the driving roller (R 1 ) is driven by a first brushless motor (M 1 ) and the pressure roller (R 2 ) is driven by a second brushless motor (R 2 ), said feeding device being driven by an electronic driving means that permits the pressure roller (R 2 ) to turn at a greater speed than the driving roller (R 1 ), permitting the movement of the overlying band ( 2 ) placed above the lower base band ( 1 ) during the advance feed, maintaining the necessary tension constant and eliminating the twisting of the overlying band in correspondence with the transversal bonding with the lower base band.