A panel member for a cyclorama includes a concavo-convex body having integrally-formed first and second side portions with an intermediate portion therebetween. The first side portion, the second side portion, and the intermediate portion have a radius of curvature in a Y-Z plane, and the first and second side portions have a radius of curvature in an X-Y plane that is different from the radius of curvature in the Y-Z plane to uniformly reflect or diffuse sound and light incident on the panel member.

A system and method for primarily erecting curvilinear buildings using a plurality of interconnected structural tubes/sandwich panels is provided. Fabricating structural tubing comprises: connecting a fibrous and flexible lining to an inner surface of a flexible outer membrane, wherein the lining is saturated in a curable material that forms into a solid foam material when cured; and curing the curable material. Fabricating a sandwich panel comprises: connecting a first fibrous and flexible lining to an inner surface of a first flexible outer membrane, wherein the first lining is saturated in a curable material that forms into a solid foam when cured; connecting a second fibrous and flexible lining to an inner surface of a second flexible outer membrane, wherein the second lining is saturated in a curable material that forms into a solid foam when cured; and curing the curable material of the first lining and second linings.

A panel member for a cyclorama includes a concavo-convex body having integrally-formed first and second side portions with an intermediate portion therebetween. The first side portion, the second side portion, and the intermediate portion have a radius of curvature in a Y-Z plane, and the first and second side portions have a radius of curvature in an X-Y plane that is different from the radius of curvature in the Y-Z plane to uniformly reflect or diffuse sound and light incident on the panel member.

A method for the manufacture of a foldable building plate element by providing a flat plate (1), providing of at least one folding groove (2) in the flat plate, providing a folding profile (6), comprising two side wings (7) and an interposed folding portion (8), and fitting the folding groove into the folding profile in such a way, for example by gluing, that the side wings thereof form a strong connection with the two side faces (5) of the folding groove. The side wings are interconnected with each other through a bridging strip (9), which will be removed when the plate is folded. The wings are further provided with connecting means (10) that snap-connect with each other when the side wings are folded towards each other. If desired, a filler strip (11) can be inserted between the side wings.

A pure wood connection structure, having pure wood units, self tapping screws, a first pure wood edge sealing unit and a second pure wood edge sealing unit; an upper side and a lower side of each pure wood unit are provided respectively with a contraction slit, and are applied with wood adhesives; in each pure wood unit, the self tapping screws are screwed into the pure wood unit from the contraction slit on the upper side, through the contraction slit on the lower side, and down into the upper side of an adjacent pure wood unit, so that the upper side of each pure wood unit is connected with the lower side of a corresponding adjacent pure wood unit; all the pure wood units are likewise mutually connected one adjacent to another to form a board structure.

A thermoacoustic soundproofing panel, constituted by at least one first mat and one second mat, each provided with individual and distinct pockets, which are mutually adjacent and are filled with an inert material; the first mat and second mat being mutually adjacent and mutually offset along a horizontal axis and/or a vertical axis.

A system and method for primarily erecting curvilinear buildings using a plurality of interconnected structural tubes/sandwich panels is provided. Fabricating structural tubing comprises: connecting a fibrous and flexible lining to an inner surface of a flexible outer membrane, wherein the lining is saturated in a curable material that forms into a solid foam material when cured; and curing the curable material. Fabricating a sandwich panel comprises: connecting a first fibrous and flexible lining to an inner surface of a first flexible outer membrane, wherein the first lining is saturated in a curable material that forms into a solid foam when cured; connecting a second fibrous and flexible lining to an inner surface of a second flexible outer membrane, wherein the second lining is saturated in a curable material that forms into a solid foam when cured; and curing the curable material of the first lining and second linings.

The construction kit consisting of wall elements and connectors to be inserted therebetween is designed in order to erect room dividers. The wall elements are produced by compressing fiber material and have at least one connecting flank which is systematically provided with contours. The connectors are designed as a profiled rail on which there is at least one connection which has systematically arranged mating contours. The contours on the wall elements can be brought into form-fitting engagement with the mating contours on the connectors. The fiber material used for producing the wall elements is a compressed polyester nonwoven fabric or a mixture of natural and synthetic fibers. The connector is an extruded profile, preferably made of aluminum. The construction kit essentially comprises rectilinear wall elements, differently curved wall elements and a three-winged wall element with three connecting flanks.

A clad duct comprising an outer sheet of thermoplastic material and an inner duct of rigid foam is disclosed. The outer sheet of thermoplastic material is bonded to the inner duct. The outer sheet has a first edge and a second edge and a seal is provided to seal the first edge and the second edge.

A clad duct comprising an outer sheet of thermoplastic material and an inner duct of rigid foam is disclosed. The outer sheet of thermoplastic material is bonded to the inner duct. The outer sheet has a first edge and a second edge and a seal is provided to seal the first edge and the second edge.