Glen Ellyn, IL, United States

Leister Technologies , LLC

www.leister.com
Glen Ellyn, IL, United States

Leister AG is a manufacturer of hot air plastic welding equipment, laser welding systems and sensor equipment. The company is currently based in Kaegiswil, near Sarnen in Switzerland. It was founded in 1949 by German Karl Leister.Leister is a long-established Swiss company, consistently dedicated to customer satisfaction. This is ensured through extremely high production quality, permanent innovation, a wealth of experience shared by its employees and above-average service. Wherever you need to apply heat: Leister provides the ideal solution. For over 60 years now. Leister are worldwide leaders in the fields of plastic welding and industrial hot air solutions.Leister has been developing innovative and effective laser systems and pioneering microsystems for many years.Leister develop and produce all Leister products in Switzerland. 98% of Leister production is exported. For this reason Leister has established a dense network of sales and service centres throughout the world. Wikipedia.

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A water vapor permeable, waterproof textile laminate, comprising at least two layers made of planar web material, which are disposed on top of each other and bonded to each other, wherein an open fabric web comprising polymer fiber threads forms a top tier and a film-like, water vapor permeable, waterproof thermoplastic membrane web forms a bottom tier. The polymer fiber threads of the fabric web comprise raised thread regions, which are held bearing against the membrane web and/or are partially fused into the membrane web, wherein the membrane web comprises integral fusion areas with the raised thread regions, which are generated according to the invention by way of laser light in a laser transmission welding method.


Grant
Agency: European Commission | Branch: FP7 | Program: CP-FP | Phase: NMP.2012.2.1-1 | Award Amount: 3.34M | Year: 2013

The requirements of innovation and efficiency are pushing industrial manufacturing methods to a new stage, where novel materials and components with enhanced properties are required. Polymers and polymer based composites are able to provide strength, light weight, corrosion resistance, impact resistance, etc. which are highly demanded from advanced technological sectors such as automotive, aerospace, electronics, consumer goods and others. For this reason the main objective presented in this project is the development of innovative and reliable thermal joining methods to join dissimilar materials, such as metal-plastic hybrid parts, with the aim to produce high quality joints between dissimilar materials, ensuring the integrity of the structure throughout the design, production and life cycle performance. Therefore, Ybridio is focused on thermal joining methods, specifically laser transmission joining (LTJ) and induction joining (IJ), which have demonstrated excellent potential to be implanted in industry. Both techniques deliver the energy directly to the base material and transmit the heat by conduction to the polymer part, so that the entire surfaces of both materials are attached to each other without any adhesive. The Ybridio project aims to achieve the following results: Development of innovative and reliable new thermal joining techniques to join two or more different types of materials creating hybrid structures, such as metal with polymer and with composite laminates Improvement of the characteristics of structures and components, combining and complementing the properties of each material Simplification of industrial plants and processes to reduce manufacturing cost To create a specific control system based on IR and NIR cameras, to ensure the quality of the components during the manufacturing process Recycling and environmental impact: thermoplastic-metal joints can be disassembled easily by applying heat again which allows easy separation


Grant
Agency: European Commission | Branch: FP7 | Program: CP-IP | Phase: NMP-2008-4.0-4 | Award Amount: 10.20M | Year: 2009

PolyBright will develop high power high brilliance lasers with new wavelengths between 1500 and 1900 nm which are adapted to the absorption properties of polymers. With innovative beam manipulation systems for optimum adaption of energy, the project will provide high speed and flexible laser manufacturing technology to expand the limits of current plastic part assembly. Key innovations of the PolyBright project are high brilliance mid-IR-wavelength fibre and diode lasers with powers up to 500 W, high speed scanning and flexible beam manipulation systems, such as dynamic masks and multi kHz scanning heads. New laser polymer joining processes for optimized thermal management in combination with wavelength adapted polymers and additives will provide higher quality, high processing speed up to 1 m/s and robust manufacturing processes at lower costs. Compact lasers with very high beam quality and free form beam shaping will enable reconfigurable assembly machines, offering high productivity with sub second cycle times and unique flexibility for varying joining geometries. The project covers the whole process chain for laser based plastic part assembly and includes laser companies, optics suppliers, material and processing specialists as well as machine suppliers. The developed machine equipment and the new laser process approaches will be validated by end users from medical, consumer good, automotive and watch industry. With this initial step, PolyBright will break new paths in processing of advanced plastic products overcoming the quality and speed limitations of conventional plastic part assembly. PolyBright will thus open new markets for laser systems with a short term potential of over several 100 laser installations per year and a future much larger market share in a multi billion plastic market. PolyBright will hence establish a comprehensive and sustainable development activity on new high brilliance lasers that will strengthen the EUs laser system industry.


Grant
Agency: European Commission | Branch: H2020 | Program: IA | Phase: FoF-12-2015 | Award Amount: 5.87M | Year: 2015

Multimaterial systems combining metals with thermoplastic fiber reinforced polymer composites (TP-FRPC) are the key for light weight design in the automotive industry. However, the joining of the material partners remains main issue. Currently, no approach exists which sufficiently meets the three core requirements: weight neutrality, cost- and time efficiency and bonding strength. Technologies like adhesive bonding or bolted joints show good results for one or two of the criterions, but not for all three of them. The FlexHyJoin project aims at the development of a joining process for hybrid components, which satisfies all three criterions. Induction Joining (IJ) and Laser Joining (LJ) are combined, since they have complementary fields of application and most of all they do not require additional material and are therefore weight neutral joining methods. Thus, the full lightweight potential is preserved. Additionally, a surface texturing method for the metal is integrated in the approach, which leads to a form closure bonding, providing a high mechanical bonding performance. Finally, a main aspect of the FlexHyJoin project is to integrate the surface texturing as well as both joining methods in a single, continuous, and fully automatized pilot process with an overall process control and supervision system. This leads to a maximum of time- and cost-efficiency and will allow the future application of the approach in the mass production of automotives. The key for the automation is an online process control and quality assurance. The FlexHyJoin project provides an essential enabler technology for future mobility concepts. The final result is an innovative joining process for fiber reinforced polymers and metals, suiting the strict requirements of automotive industry and enabling the broad application of hybrid material systems.


Patent
Leister Technologies , LLC | Date: 2012-01-25

An antimicrobial composition, including a synergistic combination of three or more agents as an active ingredient. Each of the three or more potentiating agents can be selected from the following types of compounds: sequestering agents, carbohydrates and carbohydrate derivatives, terpenes/terpenoids, amines and amine derivatives, plant-derived oils, sulfonates, phenols, fatty acids, dibenzofuran derivatives, organo isothiocyanates, quaternary ammonium compounds, peroxides and peroxide donors, and macrolide polyenes. At least two of the three or more potentiating agents are not of the same type of compound. The antimicrobial composition can have strong antimicrobial efficacy in control of microorganisms having resistance to currently used antimicrobials.


Patent
Leister Technologies , LLC | Date: 2015-02-20

A hot-wedge welding device for overlap welding plastic webs, comprising a hot wedge, a pressure device for pressing the plastic webs against the hot wedge which comprises a respective pressure unit associated with one of the hot-wedge flat sides, and further comprising two mutually opposing pressure rollers. The hot wedge is pivotably mounted on a bearing shaft by way of a bearing bushing, which extends between the two hot-wedge flat sides parallel to the hot-wedge front edge at a distance therefrom. The hot wedge is mounted to have defined degrees of freedom with respect to the bearing shaft in the longitudinal direction and in the transverse direction of the bearing bushing, which in addition to the rotational movement of the hot wedge about the transverse axis thereof, also allow a tilting movement of the hot wedge about the longitudinal axis thereof and a vertical displacement of the hot wedge.


A water vapor permeable, waterproof textile laminate, comprising at least two layers made of planar web material, which are disposed on top of each other and bonded to each other, wherein an open fabric web comprising polymer fiber threads forms a top tier and a film-like, water vapor permeable, waterproof thermoplastic membrane web forms a bottom tier. The polymer fiber threads of the fabric web comprise raised thread regions, which are held bearing against the membrane web and/or are partially fused into the membrane web, wherein the membrane web comprises integral fusion areas with the raised thread regions, which are generated according to the invention by way of laser light in a laser transmission welding method.


Patent
Leister Technologies , LLC | Date: 2011-12-15

A method for measuring transport properties of cell membranes or lipid bilayers by providing at least a substrate having a topside and a backside and plurality of nano- or micro-pores and a cell membrane covering the plurality of pores being accessible from both sides of the cell membrane for measurement, a material layer at least in the region of the pores to support the cell membrane at the pores but not hindering the transport through the cell membrane and the pores arranged on the substrate, either on the topside or on the backside, applying a fluid containing at least one molecule to the topside of the membrane in order to allow the molecule to move through the membrane, one of the pores and the material layer, and monitoring of the molecules having passed the material layer by using an optical detection method.


The hand-held hot air device, preferably for the local heating of thermoplastic materials, with a housing that forms a wand-shaped handle part with air inlet openings, and with an air guidance tube that protrudes from the handle part and radially delimits an air canal, with an electric heating element contained in the air guidance tube and an electric motor with a fan wheel contained in the handle part, and with an electronic control system arranged inside the handle part with one semiconductor power switch each arranged upstream of both the heating element and the electric motor, and with a display screen and an operating device for the hand-held hot air device arranged on the outside of the handle part. The electronic control system is implemented as microprocessor control system, the display screen as an electronic digital display, and the operating device as a digital operating device, with the digital operating device comprising a single universal operating element that is movable in at least two directions relative to the handle part for the purpose of switching the hand-held hot air device on and/or off and for determining control data of the microprocessor control system.


Patent
Leister Technologies , LLC | Date: 2011-10-19

A flow sensor for measuring the flow of a gaseous or liquid medium with a sensor housing in which, between an inlet channel and an outlet channel, a flow channel extends that comprises a main channel and a measuring channel that is arranged parallel to the main channel. At least one main channel choke point is arranged in the main channel, and the measuring channel comprises a sensor element for measuring the flow. A measuring channel choke point in the measuring channel on the inlet and/or the outlet side, is arranged with the main channel choke point having at least one passage and the measuring channel choke point having a passage, both passages being of identical shape and extending parallel to each other in the flow direction.

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