Multi layer pleatable filter medium
AssigneeColumbus Industries, Inc.
InventorsThaddeus J. Ptak, Chrystal B. Gillilan, Russell Baldinger
Life of this patent
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Abstract
A filter media and a pleated filter with a first layer of filtration media, a layer of support material and a second layer of filtration media on the opposite side of the support material as the first layer of filter media. All three layers are laminated together and pleated. The support material provides the required stiffness and rigidity for the pleating process. The physical characteristics of the upstream layer of filtration media are contemplated to be different than the characteristics of the downstream layer of filtration media.
Claims16
A filtration media comprising:
- (a) a first filtration media layer having an upstream face and an opposing downstream face;
- (b) a perforated, rigid support layer having an upstream face and an opposing downstream face, the upstream face mounted to the downstream face of the first filtration media layer;
- and
- (c) a second filtration media layer having an upstream face mounted to the downstream face of the support layer.
A filter having a frame mounted in an enclosed air path through which air is forced, the filter comprising:
- (a) a first filtration media layer having an upstream face, an opposing downstream face and lateral edges;
- (b) a perforated, rigid support layer having an upstream face, an opposing downstream filtration media layer, the upstream face mounted to the downstream face of the first filtration media layer;
- and
- (c) a second filtration media layer having an upstream face mounted to the downstream face of the support layer and lateral edges that are substantially aligned with the lateral edges of the rigid support layer, wherein the rigid support layer maintains the first and second filtration media layers in a pleated configuration in a filter frame that surrounds the aligned lateral edges of the first and second filtration media layers.
Dependencies are inferred from the claim text.