In 1997 The Hudson-Sharp Machine Company introduced INNO-LOK® and literally changed the way zippers are applied to packaging. INNO-LOK® Pre-Zippered Film can be used for barrier and non-barrier packaging applications. What is INNO-LOK® Pre-Zippered Film? It is a patented product and method for attaching reclosable fasteners transversely to packaging films, thereby producing a roll of pre-zippered film.