Patent ID: 9061234
Filing Date: 2015-06-23
Classification: B01D

Abstract:
1. 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.