Patent ID: 9656455
Date: 2017-05-23
CPC Classifications: B26F,B41F,B65H

Claim:
1. Drive device for unwinding a reel of stamping foil in an unwinding module for a stamping machine, the module having a driver, said drive device having an inactive position disengaged from the driver and from the reel, and an active position in engagement with the driver and with the reel, said drive device comprising, a belt on the drive device, having an inactive configuration in which it is disengaged from the driver and from the reel, and an active configuration for contacting a peripheral circumferential surface of the driver and of the reel, the belt being thereby driven by the driver of the module so as to unwind the reel, a series of rollers, maintaining the belt in the inactive configuration and in the active configuration, a translatable roller, which engages the belt and thereby compensates for variations in length when the belt moves from the inactive configuration to the active configuration, and a biasing arrangement, attached to the translatable roller and thereby keeping the belt tensioned in both the inactive configuration and in the active configuration, a joining element joining the drive device to a first rod of the module, comprising an arm which is pivotable about the first rod for pivoting the drive device from the inactive position to the active position and vice versa, the joining element including an actuator, characterized in that the biasing arrangement is operable to be actuated by the actuator so as to keep the belt tensioned when the belt is pivoted from the inactive configuration to the active configuration and vice versa.