3m Innovative Properties Company

Minnesota Mining and Manufacturing Company

Donald E Young

Dean R Duffy

Douglas C Sundet

Lowell E Christensen

Thomas I Insley

James F Dyrud

Daniel E Meyer

Richard Allan Kirchner

Francis E Porbeni

Cynthia Y Tamaki

Chris Manderfeld

Gregory M Jellum

Kenneth J Snider

John J Reese

A filter frame assembly is disclosed comprising a perimeter member surrounding a fluid aperture adapted to accommodate a fluid flow from an upstream direction to a downstream direction, the perimeter member comprising a perimeter upstream surface, a perimeter downstream surface, and a perimeter outer surface connecting the perimeter upstream surface to the perimeter downstream surface. A gasket carrier is attached to the perimeter member and comprises a carrier outer portion facing generally away from the fluid aperture and a first outer portion sealing member projecting from the carrier outer portion.

Filter frame assembly with seal

The present invention is a filter that includes a length of filter media and a continuous, substantially nonlinear adhesive strand. The filter media has a front face and a rear face. The filter media has a plurality of pleats defined by a plurality of fold lines, each fold line being intermediate oppositely sloping first and second wall surfaces. The plurality of fold lines comprise a first plurality of pleat tips and a second plurality of pleat valleys. The adhesive strand is provided on the front face of the filter media in discontinuous contact with the filter media. The adhesive strand contacts the filter media at a pleat tip and contacts the filter media at a portion of a first wall surface and contacts the filter media at a portion of a second wall surface.

Self-supporting pleated filter media

The method of forming pleated filter media includes providing a generally planar web of filter material, folding the web to form a pleated web having a plurality of fold lines, arranging the plurality of pleats in a first spaced configuration defined by a first distance between adjacent pleat tips, applying a continuous strand of adhesive to the web, and adjusting the arrangement of the plurality of pleats into a second spaced configuration defined by a second distance between adjacent pleat tips. The web has a front face and a rear face. Each fold line is intermediate oppositely sloping first and second wall surfaces. The plurality of fold lines form a plurality of pleats having a first plurality of pleat tips and a second plurality of pleat valleys. The second distance is different from the first distance.

Method of forming self-supporting pleated filter media

A method of making a microfibrous sorbent article is provided. The method includes the steps of a) extruding molten thermoplastic fiber forming polymer from multiple orifices in a fiber-forming die, said orifices being aligned along the face of the die; b) attenuating the fibers in a stream of hot air to form a fiber stream of microfibers; and c) collecting said microfibers on a collector having a forming surface, said surface being aligned with said die and substantially parallel to and equidistant from said die such that the fibers form a spirally wound microfibrous sorbent article which is supported on its exterior surface by said forming surface and which is drawn across said forming surface substantially parallel to said die. Also provided is a microfibrous sorbent article prepared according to the method.

Method of making sorbent articles

A shipping or secondary container, which can safely transport a plurality of breakable primary containers of a variety of sizes and shapes, has a pair of rigid shells that mate. A batt of sorptive material fills each shell, and a normally tacky, discontinuous adhesive layer covers the exposed face of at least one batt. The shells can be vacuum formed from a sheet of thermoplastic resin that is 0.25 to 0.5 mm in thickness. The two shells preferably are identical to each other. To permit them to interlock, each shell has an upstanding wall that is formed with both tongues and grooves which telescopically mate with the tongues and grooves of the other shell.

Universal shipping container for hazardous liquids

Growing community of inventors

Forest Lake, MN, United States of America

Donald E Young