Abstract: The invention relates to a method of adhesively bonding articles, in which an agent for preparation for bonding is applied and, prior to adhesive bonding, conditioning is performed. In this method it is envisaged that conditioning take place with brushing.

Abstract: The invention provides for improved welding of thermoplastic sheets by selectively reducing and optimizing the temperature gradient from the edge of the weld to the unheated body of the sheet by adding heating-surface-area, beyond that required to achieve a weld, to a heating tool for the purpose of raising the temperature of the material adjacent to and along the edge of the weld, in a controlled manner.

Abstract: The invention provides for improved welding of thermoplastic sheets by selectively controlling the amount of heat transferred from an improved heated tool to various areas of the weld, by modifying the heat transfer efficiency of selected areas of the tool's heating surfaces.

Abstract: Thermoplastic materials are welded by preheating by conduction and probably damaging the adjacent areas of the surfaces to above the melting point of the thermoplastic material using a suitable heated contact member; depositing a continuous layer of molten thermoplastic material over the adjacent preheated areas of the two surfaces; and allowing the deposited material and the material of the surfaces to solidify.

Abstract: Welding surfaces of thermoplastics material together by depositing a continuous layer of molten thermoplastic welding material over adjacent areas of the surfaces to be joined, the deposition of at least part of the molten welding material being effected with a smearing action in which the material is subjected to shear forces acting across the surfaces, and allowing the deposited material to solidify.

Abstract: This disclosure relates to the production of an ultimately continuous weld between sheets of heat fusible material using a welding apparatus which includes a supporting frame and at least one assembly of electrodes mounted on the frame and being movable between positions in which the electrodes are biased towards each other and positions in which they are disengaged from each other, the apparatus being characterized in that the electrodes are movable longitudinally in the frame together with material being welded thereby during each welding cycle and the movement of the electrodes between welding cycles is such that each individual weld at least abuts the adjacent welds after passage of the material through the apparatus.

Abstract: Welding surfaces of thermoplastics material together by depositing a continuous layer of molten thermoplastic welding material over adjacent areas of the surfaces to be joined, the deposition of at least part of the molten welding material being effected with a smearing action in which the material is subjected to shear forces acting across the surfaces, and allowing the deposited material to solidify.