초록 ▼

A fluid filter includes a first batting of high loft, non-woven, fibrous fluid-permeable material with a plurality of openings formed through the thickness thereof across the length and width of the batting. A second layer of high loft, non-woven, fluid-permeable fibrous batting is attached to the f

A fluid filter includes a first batting of high loft, non-woven, fibrous fluid-permeable material with a plurality of openings formed through the thickness thereof across the length and width of the batting. A second layer of high loft, non-woven, fluid-permeable fibrous batting is attached to the first layer and extends across the entire length and width of the first layer. Preferably, the first and second layers are adhered together to form a single integral fluid filter. In the preferred form of the invention, the openings in the first batting have side walls which are perpendicular to the upper surface of the batting, such that fluid flow impacts on the upper surface of the batting, rather than directly impacting on the side walls.

대표청구항 ▼

[ I claim:] [14.] A method of filtering particulate material from a generally unidirectional fluid stream, comprising the steps of:providing a layer of fluid-permeable material, having an upper surface, a lower surface, a pair of opposing, spaced-apart side edges and a width measured between said si

[ I claim:] [14.] A method of filtering particulate material from a generally unidirectional fluid stream, comprising the steps of:providing a layer of fluid-permeable material, having an upper surface, a lower surface, a pair of opposing, spaced-apart side edges and a width measured between said side edges, a pair of opposing longitudinal ends and a length measured between said ends, and a thickness measured between the upper and lower surfaces, said layer having a plurality of spaced apart openings extending less than the entire thickness of the layer from the upper surface towards the lower surface, said openings having a bottom surface and defining a plurality of walls separating said openings, s aid walls having an upper surface and side wall surfaces formed at an angle relative to the upper surface;positioning the layer in the fluid stream with the layer upper surface oriented up-stream of the layer lower surface, whereby said fluid stream initially passes through said wall upper surfaces and opening bottom surfaces, thence through the walls and layer of material, and thence outwardly through the lower surface of the layer.