Patent ID: 7077921
Filing Date: 2006-07-18
Classification: B01D,F24F,Y10S,Y10T

Abstract:
1. A method of manufacture comprising the steps: a. laminating together a pleated filter media with an expanded wire forming a laminate; b. pleating the laminate forming a filter pack with a pleated first edge and a pleated second edge; c. forming an inner frame selected from the group consisting of plastic, cardboard, heavy paper, coated paper, and combinations thereof, wherein the inner frame comprises an inner front panel, an inner back panel, an inner top side with a first flap and a second flap, an inner bottom side with a third flap and a fourth flap; d. adhering the pleated first edge to the inner top side; e. inserting a support wire between the inner frame and the filter media; f. adhering the first flap to the second flap and adhering the third flap to the fourth flap forming an inner box to contain the filter media; g. forming an outer frame selected from the group consisting of plastic, cardboard, heavy paper, coated paper and combinations thereof, wherein the outer frame comprises an outer front panel an outer back panel, an outer top side with a fifth flap and a sixth flap, an outer bottom side with a seventh flap and an eighth flap; h. adhering the fifth flap to the sixth flap and adhering the seventh flap to the eighth flap forming an outer box and forming an outer first side and an outer second side; i. inserting a first clip to engage the outer frame with the inner frame; and j. inserting a second clip to engage the outer frame to the inner frame forming an expandable air filter.