The invention relates to an assembly for adhesively connecting substantially congruent gluing surfaces of a first and second joining partner over their full surface, comprising: the first joining partner (1); the second joining partner (2); an adhesive layer (3) of a polar, flowable adhesive applied to the gluing surface (1a) of the first joining partner (1); means (8) for holding the second joining partner (2) above the adhesive layer (1a) of the first joining partner (1), such that the gluing surface (2a) of the second joining partner (2) faces the adhesive layer (3) on the first joining partner (1) and is disposed so as to be spaced therefrom across an air gap (5), and the spacing defined by the air gap (5) between the first joining partner (1) and the second joining partner (2) is dimensioned in such a way that a capillary volume is formed; means (7) for generating an electric field (10) in order to cause, by means of electric influence, a local charge displacement (11) on and/or in the second joining partner (1), and the charge displacement (11) is suitable for attracting the polar adhesive in such a way that it wets the gluing surface (2a) of the second joining partner (2) first in the area of the local charge displacement (11), wherein the means for generating the electric field comprise an electrode (7), which is disposed on the side of the second joining partner (2) facing away from the gluing surface (2a) and is electrically insulated from said partner (2).

The invention relates to a welding unit (1) for the welding of film tubes for a waterless toilet, the welding unit (1) comprising welding jaws (2, 3), the welding jaws (2, 3) comprising welding means covers (4, 5), characterized in that the welding means covers (4, 5) are detachably arranged on the welding jaws (2, 3), in particular are detachably connected to the welding jaws (2, 3).

The invention relates to a welding unit (1) for the welding of film tubes for a waterless toilet, the welding unit (1) comprising welding jaws (2, 3), the welding jaws (2, 3) comprising welding means covers (4, 5), characterized in that the welding means covers (4, 5) are detachably arranged on the welding jaws (2, 3), in particular are detachably connected to the welding jaws (2, 3).

A method of welding a sleeve (10) to a tube (20) includes putting onto end portions (11) of the sleeve (10) respective protective elements (40), of a material that cannot be fused with the materials of the sleeve (10) and of the outer coating (24) of the tube (20); applying on each end portion (11) of the sleeve (10) covered by a protective element (40) a respective heat-shrink element (30); supplying each heat-shrink element (30) with a quantity of heat (Q) which by heating it causes it to shrink and compress the respective end portion (11) of the sleeve (10) against the tube (20), where this quantity of heat (Q) is transmitted to the end portion (11) of the sleeve (10) to obtain a welding of the sleeve (10) to the tube (20) and produce a device (1) comprising the tube (20) with the sleeve (10).

A method of welding a sleeve (10) to a tube (20) includes putting onto end portions (11) of the sleeve (10) respective protective elements (40), of a material that cannot be fused with the materials of the sleeve (10) and of the outer coating (24) of the tube (20); applying on each end portion (11) of the sleeve (10) covered by a protective element (40) a respective heat-shrink element (30); supplying each heat-shrink element (30) with a quantity of heat (Q) which by heating it causes it to shrink and compress the respective end portion (11) of the sleeve (10) against the tube (20), where this quantity of heat (Q) is transmitted to the end portion (11) of the sleeve (10) to obtain a welding of the sleeve (10) to the tube (20) and produce a device (1) comprising the tube (20) with the sleeve (10).

In a method for printing a three dimensional structure, a continuous length of fiber that includes, interior to a surface of the fiber, a plurality of different materials arranged as an in-fiber functional domain, with at least two electrical conductors disposed in the functional domain in electrical contact with at least one functional domain material, is dispensed through a single heated nozzle. After sections of the length of fiber are dispensed from the heated nozzle, the sections are fused together in an arrangement of a three dimensional structure. The structure can thereby include a continuous length of fiber of least three different materials arranged as an in-fiber functional device, with the continuous length of fiber disposed as a plurality of fiber sections that are each in a state of material fusion with another fiber section in a spatial arrangement of the structure.

A rechargeable sealer with storage function includes a casing, an electric heating module, a circuit board, a supporting base, a press bar, a spring-back mechanism, and a sliding plate. The casing is provided with an accommodating chamber, in which are provided with a fore contact element and a rear contact element. A rechargeable battery is positioned in and between the fore contact element and the rear contact element. The circuit board, provided with an external slot, is disposed in the accommodating chamber, featured in charging the rechargeable battery. The press bar is provided with a sliding slot, and is pivotally connected with the pivoting shaft of the supporting base, served as a pressing structure corresponding to the casing.

A rechargeable sealer with storage function includes a casing, an electric heating module, a circuit board, a supporting base, a press bar, a spring-back mechanism, and a sliding plate. The casing is provided with an accommodating chamber, in which are provided with a fore contact element and a rear contact element. A rechargeable battery is positioned in and between the fore contact element and the rear contact element. The circuit board, provided with an external slot, is disposed in the accommodating chamber, featured in charging the rechargeable battery. The press bar is provided with a sliding slot, and is pivotally connected with the pivoting shaft of the supporting base, served as a pressing structure corresponding to the casing.

Aspects of the disclosure relate to manufacturing a balloon envelope for use in a stratospheric balloon system. For instance, a stream of polyethylene mixture us extruded. through an extruder in order to orient molecules of polymer chains of polyethylene and to provide an oriented film. The oriented film is passed through an electron beam and thereby crosslinking the polymer chains to provide a cross-linked film. The cross-linked film is heat sealed to form the balloon envelope

Aspects of the disclosure relate to manufacturing a balloon envelope for use in a stratospheric balloon system. For instance, a stream of polyethylene mixture us extruded. through an extruder in order to orient molecules of polymer chains of polyethylene and to provide an oriented film. The oriented film is passed through an electron beam and thereby crosslinking the polymer chains to provide a cross-linked film. The cross-linked film is heat sealed to form the balloon envelope