Patent ID: 8414674

Claim:
A collapsible air cleaner filter comprising: a pleated media filter having a first end, a second end, and a filter media extending between the first and second ends, wherein the filter media includes a first plurality of flexible end portions and a second plurality of flexible end portions, the first and second plurality of flexible end portions being separated by a plurality of pleats, and the filter media extending a first length between the first and second plurality of flexible end portions; a first end member coupled to the first end of the pleated media filter, the first end member extending a second length parallel to the first length, the first length being greater than the second length; a second end member coupled to the second end of the pleated media filter, the second end member extending a third length parallel to the first length, the first length being greater than the third length; a frame for an in-duct air cleaner, the frame includes a first wall, a second wall, two opposing side surfaces, a first support feature provided adjacent the first wall and between the two side surfaces, and a second support feature provided adjacent the second wall and between the two side surfaces, wherein: after the collapsible filter is placed into the frame, the first end member interacts with the first support feature and the first wall, the second end member interacts with the second support feature and the second wall, such that an effective seal is provided between the first end member and the first wall and the second end member and the second wall in the presence of air flow.