Patent ID: 7455636
Filing Date: 2008-11-25
Classification: B31B,B65B

Abstract:
1. An apparatus for applying a zipper strip to a moving film transversely to the direction of movement of the film, comprising means for producing continuous movement of the film in the said direction, applicator means arranged to receive the zipper strip, to present it to the film at a first location and to move with the film in the said direction to a second location, a zipper-supply means arranged to supply lengths of zipper strip to the applicator means; and sealing means arranged to move together as a unit with the applicator means and zipper-supply means in the said direction from the first to the second location to effect sealing of the zipper strip to the film during the said movement, the applicator means and the sealing means being arranged for reciprocal return movement in a direction opposite to the said direction from the second location to the first location.