Donaldson Comapny, Inc.

Other

John M Buettner

Mark Alan Gogins

Thomas M Weik

James A LeBlanc

Paul Anthony Way

Gregg T Geiger

Pleated filtration media, filtration media packs, and filtration elements containing projections are disclosed. The pleated filtration media includes projections on at least one surface, the projections configured to engage adjacent media sheets so as to reduce masking of the media. The pleated media and media pleat packs contain protrusions on the surface of the media. These protrusions are three dimensional structures that are on the surface of the media and are provided by forming the protrusion directly in the filtration media or applying structures, such as adhesive beads, or onto one or both faces of the media. Elongation of the adhesive bead can facilitate greater separation of the adjacent faces of pleated media if desired. These protrusions, also referred to herein as projections or dimples, can either contact each other or contact flat media and keep adjacent media faces from becoming in intimate contact with each other.

Filtration media, filter packs, and filter elements with protrusions

The filter structures commonly known as a bag house or a filter bag or an air filter with a bag construction can be made by preparing the bag assembly, either in a tubular or a bi-fold construction by placing a layer of fine fiber on the upstream surface of the filter media structure. The filter assembly includes a filter cabinet with an interior component. The filter component is suspended within the filter cabinet interior. The filter component includes a frame or support for the filter media. The frame or support holds the filter bags such that the filter bags are suspended from the frame in the cabinet interior. The intake air enters the cabinet, passes through the filter assembly and exits the cabinet. The air must pass first into the fine fiber layer, the filter media and then the exterior of the cabinet.

Industrial bag house elements

A high fidelity speaker array comprises a full range speaker board, a pair of tweeter boards disposed at an angle of from 120.degree. to 165.degree. with respect to said full range speaker board, and a pair of midrange speaker boards disposed at an angle between 5.degree. and 85.degree. with respect to said full range speaker board, each tweeter board being between and abutting said full range speaker board and a midrange speaker board.

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Stillwater, MN, United States of America

John M Buettner