A device for positioning at least one masking strip in a machine for metallizing wide film, enabling a film to be obtained with metallized zones and non-metallized zones. This device has at least two rollers with smooth surfaces which drive the masking strips, and are positioned to bring the masking...http://www.google.de/patents/US5211757?utm_source=gb-gplus-sharePatent US5211757 - Device for positioning masking strips in a metallizing machine
