Patent ID: 6165240
Filing Date: 2000-12-26
Classification: B01D,Y10S

Abstract:
A filter apparatus comprising:a fan folded filter sheet made of a woven polypropylene material,said sheet comprising panels separated by heat sealed fanfolds between said panels of said sheet,heat sealed finished edges disposed around a periphery of said fan folded sheet,adjacent ones of said heat sealed fanfolds are heat sealed from opposite sides of said fan folded sheet,said filter sheet removably disposed in a removable rectangular filter frame for mounting said filter material assembly in a forced air ventilation system,said filter frame having four substantially perpendicular top, bottom, and two opposed side walls between an open front end and an open back end, andat least one crank shaft rotatably disposed between said side walls and having cranks that are engageable with and substantially conforming to said fanfolds of said filter material assembly.