CLOVERDALE, CA, June 30, 2015-

"Systems and methods for making fiber webs"; US 9,062,415 (Jun. 23, 2015); filed: May 7, 2011. Assignee: Hollingsworth & Vose Company (East Walpole, MA). Inventor(s): Milind Godsay, Mark S. Millar.

Systems and methods for forming fiber webs, including those suitable for use as filter media and battery separators, are provided. In some embodiments, the systems and methods involve designs which allow improved control of the fiber web forming process. For example, in certain embodiments involving the flowing of more than one fiber mixtures, the amount of mixing of the fiber mixtures may be controlled to produce fiber webs having different structural and/or performance characteristics. In some embodiments, the systems and methods can be used to form fiber webs having a gradient in a property across a portion of, or the entire, thickness of the fiber web.

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