Patent ID: 8221567

Claim:
Filter media, comprising a corrugated porous filter media layer including a top surface and a bottom surface, wherein the corrugated porous filter media layer includes one or more peaks separated by valleys; a second porous filter media layer including a top surface and a bottom surface, the valleys of the corrugated porous filter media proximate the second porous filter media layer; and an ultrasonically weldable material layer disposed between the valleys of the corrugated porous filter media layer and the top surface of the second porous filter media layer, wherein the corrugated porous filter media layer, the second porous filter media layer and the ultrasonically weldable material layer collectively form: at least one ultrasonic bond that joins the corrugated porous filter media to the second porous filter media layer, wherein the at least one ultrasonic bond includes: a portion of the lower surface of the corrugated porous filter media layer, a portion of the upper surface of the second porous filter media layer, and a thickness of the ultrasonically weldable material layer arranged between and ultrasonically bonded to each of: the portion of the lower surface of the corrugated porous filter media layer and the portion of the upper surface of the second porous filter media layer.