Patent ID: 7435278

Claim:
A filter assembly, comprising: a filter medium having first and second opposite faces, through which air to be filtered can pass, the first and second opposite faces being separated by a distance; and a frame including two or more opposing side faces to provide support to the filter medium, each of the two or more opposing side faces having a length perpendicular to the distance between the first and second opposite faces, the frame including a first sheet that includes a first portion that extends along a majority of the length of one of the two or more opposing side faces and a second portion that extends along at least part of the first opposite face and a second sheet that includes a first portion that also extends along a majority of the length of the one of the two or more opposing side faces and a second portion that extends along at least part of the first opposite face, wherein at least part of the second portion of the first sheet that extends along at least part of the first opposite face is secured to at least part of the second portion of the second sheet that extends along at least part of the first opposite face.