Patent ID: 8034145

Claim:
An air filter cartridge comprising: (a) a stack of strips of filter media; (i) each strip of filter media comprising a sheet of corrugated media secured to facing media; (A) each strip of filter media having front and rear edges and side edges extending therebetween; (B) the stack of strips defining opposite inlet and outlet flow faces with a set of inlet flutes and a set of outlet flutes extending therebetween; (C) the stack of strips having first and second, opposite, side faces extending between the inlet and outlet flow faces; and, (D) the stack of strips comprising individual strips stepped from one another to form an inlet flow face that is not perpendicular to a direction of air flow through the stack and an outlet flow face that is not perpendicular to a direction of air flow through the stack; (b) first and second opposite, separately molded, side pieces; (i) the first molded side piece having a first side edge of each strip of filter media in the stack of strips embedded therein, during molding of the first molded side piece, to seal the first side edge of each strip of filter media; and, (ii) the second molded side piece having a second side edge of each strip of media in the stack of strips embedded therein, during molding of the second molded side piece, to seal the second side edge of each strip of filter media; and, (c) a housing seal arrangement including a perimeter seal extending around the stack of strips and the first and second, opposite, molded side pieces; (i) the perimeter seal comprising an axial pinch seal; and, (ii) the housing seal arrangement having sections extending across the first and second molded side pieces at an acute slant angle, to an axial direction between the inlet and outlet flow faces.