Patent ID: 7155988

Claim:
An air particle sample cassette to sample air, comprising: a first cover having a plurality of inlets, each of said inlets having a tapering cross section with a first opening wider than a generally opposed second opening; each of said second openings leading to a recessed area within said cassette, said recessed area being defined by sidewalls and a rib, and being capable of receiving a sample plate; said rib separating at least two of said second openings and preventing gas flow therebetween when said sample plate is positioned over said recessed area; and a second cover removably enclosing said recessed area, said second cover defining a vacuum aperture; whereby when a vacuum is applied to said vacuum aperture, air is pulled through at least one of said second openings to encounter said sample plate, with matter in said air being collected by said sample plate as said air travels to said vacuum aperture.