Methods and apparatus for elastic deactivation in a laminate
AssigneeCurt G. Joa, Inc.
InventorsRyan Ferguson, Dennis Faucher, Robert E. Andrews, Gottfried Jason Hohm
Life of this patent
Estimating the term…
Abstract
A variable interference anvil and knife combination is provided to selectively sever elastics in a laminate and preferably not sever the nonwoven portions of the laminate. The distance between the anvil and the knife can be programmatically altered to provide for smaller or larger gaps as processing speeds are changed.
Claims13
A method for operating a system having a blade roll unit revolving in a first direction about a first axis and carrying a compression blade thereon, having an anvil roll unit revolving in a second direction about a second axis and carrying a working anvil surface that faces away from the second axis and that is sloped toward the second axis from a higher leading end to a lower trailing end, and having servo motors configured to rotatably drive the blade roll unit in the first direction and the anvil roll unit in the second direction, the method comprising:
- operating the servo motors to control the rotational positioning of the blade roll unit relative to the anvil roll unit, so as to control positioning of the compression blade relative to the working anvil surface, and thereby control a force applied onto the working anvil surface by the compression blade as the compression blade and the working anvil surface rotate past each other.
An apparatus comprising:
- a blade roll unit supported for revolution in a first direction about a first axis, the blade roll unit carrying a compression blade thereon that rotates with the blade roll unit;
- an anvil roll unit supported for revolution in a second direction about a second axis, the anvil roll unit carrying a working anvil surface that is sloped toward the second axis from a higher leading end to a lower trailing end;
- and
- servo motors configured to rotatably drive the blade roll unit in the first direction and the anvil roll unit in the second direction, wherein the servo motors are operated to control the rotational positioning of the blade roll unit relative to the anvil roll unit, so as to control positioning of the compression blade relative to the working anvil surface, wherein the servo motors control positioning of the compression blade relative to the working anvil surface to control an amount of force applied by the compression blade onto the working anvil surface as the compression blade and the working anvil surface rotate past each other.
Dependencies are inferred from the claim text.