Patent attributes
A reclosable zipper strip is dispensed through a feeding mechanism and, when an optical sensor detects one of the splotch seal portions of the zipper strip, a desired length of zipper strip is advanced over an elevator platform. A knife is then signaled to descend and sever the advanced portion of zipper strip, which is thus deposited onto the elevator platform. As the selected portion of the zipper strip is being positioned and deposited onto the elevator, the web of flexible film is being positioned above the platform. A sealing head is then positioned over the web of flexible film, while at the same time the elevator platform is driven upwardly so that the zipper strip portion positioned thereon comes into contact with the web of flexible film. The heat passing through the web of flexible film creates an airtight seal of the zipper strip to the web.
