Method and device for controlling and / or maintain the voltage in a strip which moves along a path of travel and application to the embodiment of an element of printing by thermal transfer

摘要

For controlling the voltage in a strip 16, 18 along a path of travel between a coil 84, 112 and a processing station 20, a motor 146, 162 is controllable torque is the torque to the coil. A feed mechanism 22, 142 caused to advance the strip in the treatment station. The sensors 190, 192 produce signals proportional to the advance of the strip and the advance of the coil. These signals are compares to produce an indication of the radius [0196 instantaneous of the strip on the reel. The donneespeuvent then be consultees for determining the activation of the engine is necessary to produce a torque which compensates for the variation of the radius of cookies containing 2, while maintaining the voltage in the band practically constant and independent of the transfer of the strip on the coil.