Back to results
US 7,455,636 B2Granted
Application of zippers to film material
AssigneeIllinois Tool Works Inc.
InventorMurray Edward Bruce Leighton
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
AssigneeIllinois Tool Works Inc.
InventorMurray Edward Bruce Leighton
Estimating the term…
An apparatus for application of zippers to film material 10 comprises an applicator bar 22 for presenting pre-cut lengths of zipper 26 to the film and a heated sealing bar 34 for sealing the pre-cut lengths to the film. The applicator bar, the sealing bar, feed rollers 30a, 30b and a zipper cutter 32 are mounted for movement with the film on a linear motor 14. A pneumatic cylinder 18 raised the application bar towards the film 10. The applicator bar moves in direction C to apply the zipper to the film 10 moving in direction A, then moves with the sealing bar and the film in direction B, away from the film in direction C′, back to its starting position in direction B′, then towards the film again in direction C. A further length of zipper may be fed to the applicator bar at any time after the bar has moved away from the film in direction C′ and therefore during an end portion of the forward stroke of the motor, or during its return stroke.
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;
A method of applying a zipper strip to a moving film transversely to the direction of movement of the film, the method comprising moving the film continuously in said direction, supplying lengths of zipper strip to an applicator means from a zipper-supply means;
Dependencies are inferred from the claim text.