Method of treating zipper to remove camber
AssigneeIllinois Tool Works Inc.
InventorZdenek Machacek
Life of this patent
Estimating the term…
Abstract
A method and apparatus for removing camber from zipper with profiles having interlocking elements and or webs. The zipper is stretched longitudinally in a manner so that the interlocking elements stretch relative to each other. To this end, the zipper is fed to an idler wheel that may be spring loaded. From a set of first drive wheels and fed from the idler wheel by a set of second drive wheels. The second drive wheels are driven faster than the first drive wheels to effect the stretching. Alternately only the second set of drive wheels are driven and the stretch is provided by the spring loaded idler wheel or the zipper is driven around a static curved surface.
Claims10
A method of treating zipper having mated interlocking members and at least one web on each side of said mated interlocking members to remove camber in the zipper, said method comprising stretching the mated interlocking members relative to each other.
A method of treating zipper to remove camber in the zipper comprising the steps of:
- feeding a length of said zipper from a spool at a first speed to an idler roller;
- passing said zipper around said idler roller;
- and then feeding the zipper at a second speed from said idler roller, said second speed being greater than said first speed so as to stretch one interlocking member of said zipper relative to another interlocking member of the zipper.
A method of treating zipper to remove camber in the zipper compromising the steps of,
- feeding a length of zipper from a spool to an idler roller,
- passing said zipper around said idler roller,
- spring loading said idler roller,
- feeding said zipper to a second set of rollers and driving said second set of rollers so as to stretch one interlocking member relative to the other.
Dependencies are inferred from the claim text.