Patent ID: 8157881

Claim:
An air cleaner comprising: an enclosing structure, comprising: a first wall, a second wall and two side surfaces, and a first set of at least one support feature positioned adjacent the first wall and between the two side surfaces, and a second set of at least one support feature positioned adjacent the second wall and between the two side surfaces; and a collapsible filter, comprising: a pleated media filter having a first end and a second end, wherein the pleated media filter extends a first length, and a plurality of end structures extending a second length parallel to the first length, the first length being greater than the second length, at least one such end structure provided at each of the first and second ends of the pleated media filter such that the pleated media filter extends between the at least two end structures, wherein: after the collapsible filter is placed in the enclosing structure, each end structure interacts with one of 1) the first set of at least one support feature and the first wall or 2) the second set of at least one support feature and the second wall, such that an effective seal is provided between 1) at least one end structure and the first wall and 2) at least one end structure and the second wall.