A method for reducing cost and weight in paint roller manufacturing processes and other continuous processes for producing tubular goods from polymers. The method may utilize a perforated substrate such as a perforated polypropylene strip or may include a perforating step which removes overage from an...http://www.google.es/patents/US7846283?utm_source=gb-gplus-sharePatente US7846283 - Methods for manufacturing a paint roller with perforated substrate
Methods for manufacturing a paint roller with perforated substrate
