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US 8,007,623 B2Granted
Apparatus and method for intermittent application of stretchable web to target web
AssigneeCurt G. Joa, Inc.
InventorRobert E Andrews
Life of this patent
Estimating the term…
Abstract
Apparatus and methods are provided to allow for cutting a stretchable first web into segments and securing the segments to a second web. The apparatus includes an infeed rate adjustment apparatus, a tension control device, a cutting apparatus, and means for securing the segments to the second web. The infeed rate adjustment apparatus is sized and configured to adjust the speed of the infeed of the first web to the cutting apparatus to space apart the segments.
Claims18
A method for intermittently applying segments of a first web of material onto a second web of material comprising:
- providing a first continuous web of material, the first web being of a stretchable material;
- providing a rotatable anvil having a peripheral surface and a cutting roll positioned to cut segments from the first web against said anvil, said anvil being supplied interiorly with a reduced air pressure and being provided with openings through said peripheral surface, said anvil being sized and configured to continuously rotate at a first velocity;
- feeding said first web toward said anvil at an infeed velocity;
- and
- varying said infeed velocity between a first infeed velocity and a second infeed velocity while said web is being fed toward said anvil;
- intermittently cutting a succession of segments against said peripheral surface of said anvil while said infeed velocity is at said first infeed velocity and conveying each of said segments successively on said rotating peripheral surface, using said reduced air pressure to hold said segments against said peripheral surface, and then varying said infeed velocity to said second infeed velocity;
- providing a second continuous web of material traveling, in close proximity, but displaced from said anvil;
- intermittently applying the successive segments to the second web.
5 more elements
An apparatus comprising:
- a cylindrical anvil roll with a pattern of vacuum openings on a peripheral surface thereof and means for drawing a vacuum within said cylindrical anvil;
- means for feeding a continuous web of stretchable material onto said anvil at a variable rate, said rate variable between a first velocity and a second velocity;
- means for controlling the tension in the first web;
- a knife roll, the knife roll positioned to cut said web of stretchable material against said anvil to create a succession of spaced apart segments;
- means for transporting a second web in contact with said anvil.
2 more elements
Dependencies are inferred from the claim text.