Abstract: A cup is made from sheet material. The cup has two opposite side sections for forming a cylinder with one of a gutter-like and spout-like shape in an open state of the cup, a rectangular including square bottom for serving as a base for the cup in the open state of the cup, and folding lines in the side sections that form sides and bases of two isosceles triangles. The folding lines that form the bases of the two isosceles triangles form two of four edges of the bottom. A central folding line in the bottom is parallel with the other two of the four edges of the bottom and runs along a center line of the bottom, connects to the folding lines of the bases of the two isosceles triangles and continues up along the perpendicular of the two isosceles triangles and the side sections to a rim of the side sections and cup. This divides the side sections into pairwise congruent surfaces with insides that bear upon each other when the cup is in a collapsed state.

Abstract: A composite panel, with a core member; a cover plate glued to the upper side of the core member, and also a cover plate glued to the lower side; and with an edge strip secured to the rim of the core member. The composite panel substantially avoids dimensional tolerance problems which can arise at the edge strip, and high demands made during technical use, and by designers, can be met by the panel. The edge strip includes two corner strips which extend centrally from the edge strip and which have a width which is precisely, i.e. with negligible tolerance, predetermined. The edge strip also has a central strip. The core member comprises peripheral ledges which extend centrally from the upper and lower sides with precisely predetermined thickness, and an intermediate component arranged between the ledges. The thickness of the peripheral ledges is adapted to the width of the corner strips of the edge strip.

Abstract: A composite panel, with a core member; a cover plate glued to the upper side of the core member, and also a cover plate glued to the lower side; and with an edge strip secured to the rim of the core member. The composite panel substantially avoids dimensional tolerance problems which can arise at the edge strip, and high demands made during technical use, and by designers, can be met by the panel. The edge strip includes two corner strips which extend centrally from the edge strip and which have a width which is precisely, i.e. with negligible tolerance, predetermined. The edge strip also has a central strip. The core member comprises peripheral ledges which extend centrally from the upper and lower sides with precisely predetermined thickness, and an intermediate component arranged between the ledges. The thickness of the peripheral ledges is adapted to the width of the corner strips of the edge strip.

Abstract: An expansion element comprises a plurality of identical hook or spiral shaped members which are interleaved such that when one of the members is caused to move radially outward it cooperates with adjacent members to move them outward also. The outward movement may be initiated by a centrally located plug which may either rotate or move axially.

Abstract: This invention concerns a set of assembly elements consisting of assembly rails fitted to engage each other along a nodal line, and which may be intended for the assembly of sheet elements; the individual rail may be attached along the edge of each sheet element by its underside by generally known means, such as screws, glue or tongued and grooved joints; the cross-section of the individual assembly rail consisting of a basic part and a hook-shaped part; at least the basic parts, duly assembled, will bear against each other, preferably along radial surfaces.

Abstract: An assembling component for rigidly interlocking with one or more identical components, to lock plates and the like together including a base and a hook-shaped member integral with the base and having an outer side and an inner side with the hook-shaped member shaped such that a portion along the outer side is congruent with a portion of the inner side of a second identical assembling component when the base is bearing against the base of the identical assembling component and the hook-shaped members are interlocking.