Abstract: An assay chip for investigation the functionality of membrane proteins and their interactions with molecules includes a nanopore array having a plurality of nanopores in a suitable support layer deposited on the nanopore substrate and being a substantially planar support layer having a plurality of nanopores corresponding to the nanopores of the nanopore substrate. The chip includes further a biologically effective layer capable to host at least a non-lipid molecule or functional molecule, deposited on the support layer and covering the plurality of nanopores, resulting in accesible nanopores from both sides of the biologically effective layer for measurement or imaging. The structured support allows generating a biologically effective membrane, such as a lipid bilayer membrane, having high and reliable stability in a manner that its fluidity is sustained in order to keep integrated membrane proteins in the lipid bilayer in its full biological functionality.

Abstract: The invention concerns a laser device for joining work pieces made of plastic by means of beam welding technology, with a processing head that has focusing devices for the laser beam. Here, the focusing device that is closest to the work pieces has a rotatably supported cylinder lens in the shape of a roller that focuses the laser beam along a single axis and presses the work pieces together in the form of a line in an area around the impact point of the laser beam. In order to enable the cylinder lens to always contact the surface of the work piece facing the processing head in a precisely tangential manner, the processing head has a pendulum-type suspension for the rotatable cylinder lens. This also makes it possible for the contact pressure exerted by the processing head to always act perpendicularly on the work pieces so that they are pressed together in all welding places in the same way in a defined manner during the welding process.

Abstract: The invention relates to a method for connecting material webs disposed with overlapping edges, wherein an automatic welding machine having a driven chassis and a drive unit disposed thereon and a welding unit is guided along the overlap zone of the material webs to be connected, such that the carried welding unit connects the edges to be connected to one another. The invention further relates to an automatic welding machine for performing the method.

Abstract: The invention relates to a handheld welding tool with external air supply for welding thermoplastic synthetic material, with a preferably wand-shaped housing containing at least one hot air generating device, and with flexible supply lines for air and power supply that are combined in a supply line package. The supply lines of the supply line package are connected with rear connection elements on the housing, to the supply line for the air supply encasing the power supply line as a sheath. The invention proposes to connect the supply line package rotatably to a common rear non-rotatable connection piece of the housing. This makes it possible to rotate the handheld welding tool with little force in relation to the supply line package in order to facilitate the handling of the handheld welding tool.

Abstract: A hot air welding nozzle for a hot air welding device for welding overlapping webs of sealing material. The hot air welding nozzle includes a connection for a hot air supply, a top and a bottom heat plate forming an air space, and at least one rear outlet between the top and bottom heat plate on a facing side that is oriented in a direction opposite to the moving direction of the hot air welding device, with at least one front outlet relative to the moving direction of the hot air welding device, and with air guides that extend beyond the facing sides of the heat plates, at least on the inner side.

Abstract: A welding machine for joining overlapping webs of sealing material, with a powered chassis supported by rolls, with a heating system for local heating of the webs of sealing material that is mounted laterally to the chassis (4) and can be placed between the webs of sealing material in edge regions, with at least a first pressure roll installed on the chassis for pressing together the webs of sealing material to be joined by means of heat, where a second pressure roll serving as a replacement pressure roll is placed in the chassis, whose weight rests on the drive shaft and which can be exchanged without tools for the first pressure roll that is coupled to the drive shaft of the welding machine and presses together the bitumen webs to be joined. In addition, the pressure roll (3) may have at least one contact surface made of hard metallic material; and a stripper element is provided whose free end contacts the contact surface or is in close proximity to the same.

Abstract: The invention concerns a laser device for joining work pieces made of plastic by means of beam welding technology, with a processing head that has focusing devices for the laser beam. Here, the focusing device that is closest to the work pieces has a rotatably supported cylinder lens in the shape of a roller that focuses the laser beam along a single axis and presses the work pieces together in the form of a line in an area around the impact point of the laser beam. In order to enable the cylinder lens to always contact the surface of the work piece facing the processing head in a precisely tangential manner, the processing head has a pendulum-type suspension for the rotatable cylinder lens. This also makes it possible for the contact pressure exerted by the processing head to always act perpendicularly on the work pieces so that they are pressed together in all welding places in the same way in a defined manner during the welding process.

Abstract: Handheld extruder welding device for welding thermoplastic synthetic materials, including an extrusion screw with an attachment shaft and a device for the axial attachment of the extrusion screw with the attachment shaft to a gear-equipped drive system; where a one-piece gear housing for holding the gear is equipped with a front-side bearing flange for accepting the extrusion screw; where an output shaft arranged in the bearing flange has an output gear attached to it at the cup-side end and has an opening for inserting the attachment shaft; where a two-part annular clamping flange for clamping the extrusion screw in the bearing flange is provided; and where the clamping flange can be placed on the bearing flange from outside and can be clamped. In addition, the clamping flange may contain at least one feed channel for the welding wire. This design offers a compact, stable, and short gear output where the extrusion screw can be exchanged easily.

Abstract: Handheld extruder welding device for welding thermoplastic synthetic materials, including an extruder screw, a drive system for the extruder screw in an axial extension of the extruder screw, and a hot air unit with a blower, where the blower and the drive system are integrated in a housing including several parts, and where a cooling body with air inlets is located on the housing on the screw side. This cooling body transfers the axial and radial forces between the drive system and the screw cylinder and supports the housing. In this handheld extruder welding device, all drive components are integrated in one housing which makes it suitable for robust use and a long service life. Its design with a cooling body as the support base for the entire device represents a special function.