Abstract: This invention relates to a sealing device for flexible closures for building openings, especially aircraft hangars, gymnasiums, etc. The device comprises elongate flexible sealing gaskets located alongside and substantially coextensive with each of the vertical building members on each side of the opening. The gaskets decline inwardly toward one another and each has a convex outer surface, which is skewed outwardly from the opening. The gaskets contact the flexible door along its vertical edges to seal it when closed and assist in preventing wrinkles or uneven winding of the flexible door on its roller.

Abstract: The invention is a compact in-line fluid filter. Two nested filter baskets have circumferential walls of fine mesh filtering media which is capture molded into a supporting structure. A magnet, transversely mounted to the fluid flow, attracts and retains ferromagnetic particles traveling in the fluid. This configuration provides a fluid filter with a larger filter area in a small package which is not position sensitive. Fluid entering the filter is divided into two parallel paths which have a low pressure drop. By distributing the flow and therefore trapped particles over the large filter area, a long service life is also attained.

Abstract: A device for releasably retaining together in air-tight relationship the edges of a plurality of film layers which may be used, for example, in an inflatable structure. The device includes a pair of elongate strips, one of which is snapped into the other with the edges of the film layers positioned therebetween, thereby forming a seam at the film edges. The strips are preferably extruded shapes which are coextensive in length with the edges of the film to be sealed together. Means are provided for anchoring the strips to the ground after they have been engaged with the film layer edges, with the anchor means designed to enhance the locking force placed on the device.

Abstract: A water mattress construction is disclosed. The construction involves a folded one-piece vinyl sheet wherein the only longitudinal seam is located on the bottom, thereby avoiding side seams on the mattress and wherein the end seams are located below the upper mattress surface. Lap seams are used throughout for additional strength.