Gas filter assemblies and methods for filtering gases
AssigneePall Corporation
InventorJoseph E. Lundquist
Life of this patent
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Abstract
A gas filter assembly includes a housing and a gas filter positioned in the housing. The gas filter includes a pleated filter pack, a spacer arrangement which includes solidified bonding material between adjacent pleat legs on the upstream surface of the filter pack, and insert spacers between adjacent pleat legs on the downstream surface of the filter pack.
Claims22
A gas filter comprising a housing having a gas inlet and a gas outlet and defining a gas flow path between the gas inlet and the gas outlet and a gas filter positioned in the housing across the gas flow path, the gas filter including a pleated filter pack which includes a plurality of pleats having longitudinally extending crests and roots and a pair of pleat legs extending from each crest to adjacent roots, wherein the pleated filter pack has an upstream surface, a downstream surface, and a pleated fibrous filter medium arranged to remove particulates from gas flowing from the upstream surface to the downstream surface of the filter pack, a spacer arrangement positioned between adjacent pleat legs along the upstream surface of the filter pack, the spacer arrangement including spaced, parallel beads of a solidified bonding material bonded to and extending along the upstream surface of the pleated filter pack, and insert spacers positioned between adjacent pleat legs along the downstream surface of the filter pack, wherein the insert spacers comprise a corrugated material having a plurality of gas flow channels and corrugations that are spaced from one another a distance which is less than a distance between adjacent parallel beads of solidified bonding material.
A gas filter assembly comprising a housing having a gas inlet and a gas outlet and defining a gas flow path between the gas inlet and the gas outlet, a pleated fibrous filter medium positioned in the housing across the gas flow path, the pleated fibrous filter medium including an upstream surface, a downstream surface, and a plurality of pleats, wherein the plurality of pleats has longitudinally extending crests and roots and a pair of pleat legs extending from each crest to adjacent roots and wherein the pleated fibrous fitter medium is arranged to remove particulates from gas flowing from the upstream surface to the downstream surface of the filter medium, hot-melt spacer beads positioned between adjacent pleat legs and bonded to the upstream surface of the filter medium, wherein a plurality of the hot-melt spacer beads are spaced from one another to define gas flow channels extending between adjacent pleat legs along the upstream surface of the filter medium, and corrugated insert spacers positioned between adjacent pleat legs along the downstream surface of the filter medium, wherein the corrugated insert spacers include a plurality of gas flow channels and corrugations that are spaced from one another by a distance that is less than a distance between adjacent hot-melt spacer beads.
Dependencies are inferred from the claim text.