Patent ID: 8216413

Claim:
A method for making a pocket filter assembly comprising: providing two side and two end header elements wherein each header element has a pair of longitudinally extending side walls and a longitudinally extending bottom wall forming a longitudinally extending channel; joining each of said header elements together at ends forming a rectangular header with two opposing sides and two opposing ends wherein said bottom walls and said side walls of each of said opposing sides and said bottom walls and said side walls of each of said opposing ends become adjacent forming a rectangular header with a continuous bottom wall and continuous inner and outer side walls, the downstream side of said header having a continuous channel; inserting an upstream perimeter portion of a filter element between said inner and outer side walls of said header in said channel, said filter element having a plurality of pockets; placing a liquid polymeric material between said inner and outer side walls of said header; and solidifying said liquid polymeric material forming a header frame having said upstream perimeter portion of said filter element unitary therewith.