The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 25, 2008
Filed:
Jan. 21, 2005
Murray Edward Bruce Leighton, Whitley Bay, GB;
Murray Edward Bruce Leighton, Whitley Bay, GB;
Illinois Tool Works Inc., Glenview, IL (US);
Abstract
An apparatus for application of zippers to film materialcomprises an applicator barfor presenting pre-cut lengths of zipperto the film and a heated sealing barfor sealing the pre-cut lengths to the film. The applicator bar, the sealing bar, feed rollersand a zipper cutterare mounted for movement with the film on a linear motor. A pneumatic cylinderraised the application bar towards the film. The applicator bar moves in direction C to apply the zipper to the filmmoving 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.