Patent ID: 7083722

Claim:
A filter comprising: a) at least two surperposed layers of filtration material, each superposed layer having superposed side edges, and one of the layers having an opening there through spaced inwardly from the side edges; b) the superposed side edges of the two superposed layers each having been formed by an ultrasonic weld tool severing a marginal area from a larger piece of filtration material; c) the superposed side edges being sealed together by the ultrasonic weld tool simultaneously sealing the edges as they are formed by said severing, the weld formed in the superposed side edges defining a sealed severed edge; and d) the filtration material having a fitment attached thereto in the area of said opening, the fitment having flanges that are larger than the opening, covering both surfaces of the layer of filtration material, thus completely surrounding the opening.