Blank joining module

A blank joining module comprising:

• an upper feeder device and a lower feeder device, each feeder device being configured to feed a respective first and second blank in a direction of transportation;
• a joining transfer comprising a lower transfer conveyor and an upper transfer conveyor, wherein the lower transfer conveyor comprises an inlet portion configured to transport a lower blank towards a junction point where an upper blank is positioned onto the lower blank such as to form a composed blank,
• wherein the lower transfer conveyor further comprises an outlet portion located downstream of the junction point,
• wherein the upper transfer conveyor comprises a downwardly sloping inlet portion located upstream of the junction point in the direction of transportation and a horizontal outlet portion,
• wherein the upper transfer conveyor comprises an upper conveyor belt, and
• wherein a contact roller is located in the junction point, the contact roller being configured to indirectly apply contact pressure to the composed blank by pressing onto an inner periphery of the upper conveyor belt, and wherein the contact roller is attached to a linearly movable piston rod.