Pall Corporation

Joseph Verschneider

Tanweer Ul Haq

Thomas Welch, Jr

John D Miller

Thomas C Welch, Jr

Fluid treatment arrangements and elements and methods for making and using fluid treatment arrangements are disclosed. A ribbon including a permeable fluid treatment medium may be spirally wound in a plurality of windings to form a fluid treatment element having a disk-shaped body. Two or more fluid treatment elements may be positioned along a core assembly with spaces between at least some of the adjacent fluid treatment elements. Posts may be located in some of the spaces and may be bonded to the adjacent fluid treatment elements. Bands may encircle some of the spaces to block radial fluid flow into or out of the spaces.

Fluid treatment elements and fluid treatment arrangements with posts and/or bands between fluid treatment elements and methods for making and using them

Fluid treatment arrangements having at least first and second radially displaced sets () of fluid treatment elements and methods for making and using them are disclosed: A ribbon including a permeable fluid treatment medium may be spirally wound in a plurality of windings to form a fluid treatment element of either set. At least two and as many as fifty or more fluid treatment elements (&#x2033;) may be positioned along a hollow core assembly () in each set. Fluid may be directed to or from the interior of the core assembly through a fluid treatment element of the first set and a fluid treatment element of the second set. In each fluid treatment element, fluid flows generally edgewise through the permeable fluid treatment medium.

Fluid treatment arrangements with sets of fluid treatment elements and methods for making and using them

Fluid treatment arrangements and methods for making and using fluid treatment arrangements are disclosed. A ribbon including a permeable fluid treatment medium may be spirally wound in a plurality of windings to form a fluid treatment element having a disk-shaped body. For some embodiments, the ribbon may comprise a composite having first and second layers. At least two and as many as many as fifty or more fluid treatment elements may be positioned along a core assembly with spaces between at least some of the adjacent fluid treatment elements. Many, most, or substantially all of the spaces may be substantially free of structure. A fluid treatment arrangement may be contained in a housing to form a fluid treatment assembly. The housing may include an inlet port and an outlet port and may define a fluid flow path between the inlet port and the outlet port. The fluid treatment arrangement may be positioned in the housing across the fluid flow path.

Fluid treatment elements and fluid treatment arrangements with spaces between fluid treatment elements and methods for making and using them

A filter may comprise a plurality of pleats, at least one pleat including a pair of pleat legs and pleat tip region. In some embodiments, a thickness of pleat tip region at a point spaced about one to four pleat leg thicknesses from the end of the pleat tip region may be less than or equal to about twice the pleat leg thickness or may be less than or equal to a distance between corresponding points on opposing outer surfaces of the pleat legs. A filter may comprise a pleated structure having a plurality of pleats. In some embodiments, the pleated structure may have more than one layer and at least one of the pleats may have a reformed pleat tip region. In other embodiments, the pleated structure may have a pair of pleat legs and at least one of the pleats may have a reformed pleat tip region and contacting pleat legs. A filter may comprise a plurality of pleats, at least one pleat including a pleat tip region having contacting inner surfaces. A method of making a filter may comprise forming a plurality of pleats having pleat tip regions and applying pressure to opposing outer surfaces of at least one pleat tip region. A method of making a filter may also comprise forming a plurality of pleats free of bulbous pleat tip regions. A method of making a filter may comprise forming a plurality of pleats wherein a thickness of each pleat tip region at a point spaced about one to about four pleat leg thicknesses from the end of the pleat tip region is less than or equal to about twice the pleat leg thickness or is less than or equal to a distance between corresponding points on opposing outer surfaces of the pleat legs. An apparatus may comprise one or more dies arranged to reform a pleat tip region of a pleat.

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Cortland, NY, United States of America

Joseph Verschneider