Abstract: An air filtration system includes a support structure, an enclosure coupled to the support structure and including an air outlet, a filter and a fan operatively coupled to the enclosure, and a diffusion screen configured to cover the air outlet. The diffusion screen includes a screen frame configured to be removably attachable to the enclosure with at least one releasable fastener, and at least a diffusion layer substantially spanning the screen frame to cover the air outlet to provide unidirectional or laminar air flow from the air outlet.

Abstract: An air filtration system includes a support structure, an enclosure coupled to the support structure and including an air outlet, a filter and a fan operatively coupled to the enclosure, and a diffusion screen configured to cover the air outlet. The diffusion screen includes a screen frame configured to be removably attachable to the enclosure with at least one releasable fastener, and at least a diffusion layer substantially spanning the screen frame to cover the air outlet to provide unidirectional or laminar air flow from the air outlet.

Abstract: The present disclosure relates generally to a tool for removing dried ink from whiteboards using a bonded media made of intertwined surface fibers in a semi-compact, sponge-like material. In one embodiment, the bonded media is made of laminated polyester or PVC with alternating high-melt and low-melt fibers to create weak layers in the bonded media. The bonded media is placed on a pad, mitten, or glove and bonded to a scrim.

Abstract: A filter frame including a panel having a plurality of V-shaped elements disposed on the first side thereof. Each V-shaped element includes a pair of slots each configured to receive and orient a filter element. A portion of the panel disposed between adjacent pairs of V-shaped elements has an opening form therein to define a handle for carrying the filter frame.

Abstract: An air flow filter assembly of the side-loading type includes a filter guide track adjacent a side access opening for supporting multiple air filter elements in an operative position across the air flow passage. An internal closed loop seal assembly provides an effective, independent peripheral seal for each track-mounted filter element. A gasket retainer, mounted within the air flow passage adjacent the filter track, includes frame segments forming a rectangular gasket frame bordering one or more air flow windows or cells. A seal gasket is mounted on each gasket frame, with each seal gasket including a resilient flange portion extending in a closed loop around each air flow window or cell. The closed loop flange portion projects from the gasket frame for engaging and resiliently sealing along the face of a filter element supported on the filter track in air flow alignment with the air flow window or cell.