Patents by Inventor Jie-Wei Chen

Jie-Wei Chen has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20110309068
    Abstract: The invention concerns a heating element for a hot air device with a heating resistor located in an airflow that comprises at least one air channel for the airflow, and with a heating conductor for converting electric energy to heat, and with a carrier element of thermally stable material for the heating conductor. Essentially, the heating resistor is made entirely of ceramic material. The carrier element has an electrically insulating ceramic material, and the heating conductor has an electrically conductive ceramic material. The ceramic materials of the carrier element and of the heating conductor are connected to each other with full surface-to-surface contact.
    Type: Application
    Filed: January 23, 2007
    Publication date: December 22, 2011
    Inventor: Jie-Wei Chen
  • Publication number: 20110134125
    Abstract: An image processing method for power saving is provided and includes the following steps. An original image is converted to a specific color space, so as to obtain a target image. A color converting table is created according to a color difference offset range, in which the color converting table records a plurality of power-saving pixel values. The color converting table is looked up, so as to convert original pixel values of a plurality of pixels of the target image into a part of power-saving pixel values. Furthermore, an output image is generated by using pixels with the part of the power-saving pixel values.
    Type: Application
    Filed: December 14, 2009
    Publication date: June 9, 2011
    Applicant: INSTITUTE FOR INFORMATION INDUSTRY
    Inventor: Jie-Wei Chen
  • Publication number: 20090314767
    Abstract: An electrical heating element, in particular for a hot-wedge film welding device, having two electrodes and a heating resistor arranged between the electrodes such that an application of an electrical voltage to the electrodes results in heat being produced along the length of the heating resistor. The heating resistor is designed to correspond to the shape of a heating wedge of a film welding machine, such that it can replace the heating cartridge and the hot wedge of a conventional film welding device. It is preferably produced from a conductive ceramic material and is distinguished by uniform heat distribution, good thermal conductivity and resistance to wear, as well as by excellent corrosion resistance.
    Type: Application
    Filed: January 25, 2007
    Publication date: December 24, 2009
    Inventors: Jie-Wei Chen, Alexander Greber
  • Patent number: 7297222
    Abstract: A method and device allows dynamic mask welding with online position adjustment in the high-speed welding of structured and endless plastic films. By a transparent driven mask roller provided with masks being arranged in a passive pressure roller surrounding the mask roller, detection can take place optically, and the mask roller and consequently the mask are synchronized with the film speed. Adjustment is detached from a film transport mechanism and does not influence the welding process and in this case, above all, the speed. High film transport speeds in the range of up to 1000 mm per second can be employed.
    Type: Grant
    Filed: May 3, 2004
    Date of Patent: November 20, 2007
    Assignee: Leister Process Technologies
    Inventor: Jie-Wei Chen
  • Patent number: 7285744
    Abstract: A method and apparatus for simultaneously heating materials, in particular for welding plastic components, having an arbitrary shape of a flat heating contour by laser radiation is provided. The apparatus has, an appropriate optical arrangement that is used to convert a laser beam into an annular laser beam and focus it onto the end wall of a light-guiding tube and couple it in. At an exit end, the tube is deformed in accordance with the desired heating contour such that the emerging laser beam has this heating contour.
    Type: Grant
    Filed: August 17, 2004
    Date of Patent: October 23, 2007
    Assignee: Leister Process Technologies
    Inventor: Jie-Wei Chen
  • Patent number: 7282665
    Abstract: A method for joining workpieces by welding with laser light, in which a plurality of workpieces are arranged between a lower pressure plate and a translucent upper pressure plate on a multiplicity of supporting segments movable in a vertical direction, whereby the workpieces are subsequently exposed through the upper pressure plate to a laser beam. The workpieces on the supporting are pressed together and towards the upper plate with a prescribed contact pressure, the spacing of the supporting segments from the upper pressure plate being set variably and independently from each other. A device for joining workpieces by welding with laser light, comprises at least one upper pressure plate of transparent material and a lower pressure plate with multiplicity supporting segments for the workpieces. The supporting segments are arranged side by side on the lower plate and are movable in a vertical direction by compressed air and can be set independently from each other.
    Type: Grant
    Filed: September 22, 2003
    Date of Patent: October 16, 2007
    Assignee: Leister Process Technologies
    Inventors: Jie-Wei Chen, Adolf Niederberger
  • Patent number: 7223315
    Abstract: Method and apparatus for heating plastic by laser beams with the aid of a number of laser points on the focal plane, the laser points being produced by an optical arrangement with the aid of a multiple wedge plate. The arrangement can be integrated in a processing head.
    Type: Grant
    Filed: October 6, 2004
    Date of Patent: May 29, 2007
    Assignee: Leister Process Technologies
    Inventor: Jie Wei Chen
  • Patent number: 7211166
    Abstract: A method for joining workpieces made from plastic, the upper workpiece, facing a laser source, consisting of a material transparent to the laser beam, and the lower workpiece consisting of a material absorbent to the laser beam, such that the mutually bordering contact surfaces for the two workpieces melt and are joined to one another under pressure during a subsequent cooling, the guiding of the laser beam onto the site to be joined, and the mechanical compression of the workpieces being carried out simultaneously by a machining head. The corresponding device comprises a machining head with focussing devices for the laser beam onto the contact surface, and pressure-exerting devices for compressing the workpieces. A rotatably mounted glass ball or roller is particularly suitable as pressure-exerting device. The invention permits welding quality to be assured in conjunction with flexibility of the welding operation without expensive and complicated damping balls.
    Type: Grant
    Filed: September 22, 2003
    Date of Patent: May 1, 2007
    Assignee: Leister Process Technologies
    Inventors: Jie-Wei Chen, Adolf Niederberger
  • Publication number: 20060060304
    Abstract: A method for joining workpieces made from plastic, the upper workpiece, facing a laser source, consisting of a material transparent to the laser beam, and the lower workpiece consisting of a material absorbent to the laser beam, such that the mutually bordering contact surfaces for the two workpieces melt and are joined to one another under pressure during a subsequent cooling, the guiding of the laser beam onto the site to be joined, and the mechanical compression of the workpieces being carried out simultaneously by a machining head. The corresponding device comprises a machining head with focussing devices for the laser beam onto the contact surface, and pressure-exerting devices for compressing the workpieces. A rotatably mounted glass ball or roller is particularly suitable as pressure-exerting device. The invention permits welding quality to be assured in conjunction with flexibility of the welding operation without expensive and complicated damping balls.
    Type: Application
    Filed: October 20, 2005
    Publication date: March 23, 2006
    Inventors: Jie-Wei Chen, Adolf Niederberger
  • Patent number: 6966968
    Abstract: Process and apparatus for joining endless polymer materials by means of the transillumination technique. According to the invention, in order to be joined, the endless materials are guided through two contrarotating rollers that press against each other. The first roller consists of a material that is transparent to laser beams and is tubular. The second roller is formed from a material that can be deformed easily at the surface, so that its surface can adapt to the shape of the first roller. Devices for producing a laser beam at the contact surface between the materials to be joined are arranged in the first roller. In this case, the beam is formed as a linear laser beam longitudinally with respect to the direction of movement of the materials so that during the passage, continuous heating of the material up to the melting point is achieved, without an excessively high laser output having to be provided. By means of the process and the apparatus, continuous joining is possible at high speed.
    Type: Grant
    Filed: June 13, 2002
    Date of Patent: November 22, 2005
    Assignee: Leister Process Technologies
    Inventors: Jie-Wei Chen, Adolf Niederberger
  • Publication number: 20050167407
    Abstract: Process and apparatus for joining components, in particular plastic components, by laser beams using a transmission welding process. To ensure that the laser beams are simultaneously introduced into the region of the joint seam even in the case of relatively large components, a clamping element is provided. The clamping element includes devices for diverting the laser beam onto the joint seam. In addition, there is a clamping part which is matched to the shape of the components and is transparent to the laser beam, by which clamping part the components are pressed together and the laser beam is introduced into the region of the joint seam. This allows a scanner process to be used without restriction for all possible components in particular in the case of simultaneous welding. The process can also be used to solder connections for electronic components.
    Type: Application
    Filed: September 20, 2004
    Publication date: August 4, 2005
    Inventors: Jie-Wei Chen, Christiane Leister
  • Publication number: 20050077276
    Abstract: A method and apparatus for simultaneously heating materials, in particular for welding plastic components, having an arbitrary shape of a flat heating contour by laser radiation is provided. The apparatus has, an appropriate optical arrangement that is used to convert a laser beam into an annular laser beam and focus it onto the end wall of a light-guiding tube and couple it in. At an exit end, the tube is deformed in accordance with the desired heating contour such that the emerging laser beam has this heating contour.
    Type: Application
    Filed: August 17, 2004
    Publication date: April 14, 2005
    Inventor: Jie-Wei Chen
  • Publication number: 20050039855
    Abstract: An apparatus for welding over a large area according to the laser transmission method, in particular for welding plastic strips to form a grid structure. To this end, a multiplicity of processing heads are assembled to form a unit, so that a high production throughput can be achieved. Spacer devices for setting the distance of the top transparent material strips to be welded are also located between the individual processing heads.
    Type: Application
    Filed: September 22, 2003
    Publication date: February 24, 2005
    Inventors: Jie-Wei Chen, Marcel Pironato
  • Publication number: 20040231788
    Abstract: Laser joining method for connecting different workpieces by the transmission welding method. The laser beam is formed in such a way that the energy density of the laser radiation along the direction of propagation is dependent on the distance from the laser source. A beam constriction in which the maximum energy density is located is produced. A contact surface between the workpieces is arranged in such a way that it is located in the region of high energy density. The plastics material outside the zone of the beam constriction is not effectively heated. The method permits the mass production of welded structured workpieces.
    Type: Application
    Filed: May 18, 2004
    Publication date: November 25, 2004
    Inventors: Jie-Wei Chen, Andreas Danzer
  • Publication number: 20040231787
    Abstract: A method and device allows dynamic mask welding with online position adjustment in the high-speed welding of structured and endless plastic films. By a transparent driven mask roller provided with masks being arranged in a passive pressure roller surrounding the mask roller, detection can take place optically, and the mask roller and consequently the mask are synchronized with the film speed. Adjustment is detached from a film transport mechanism and does not influence the welding process and in this case, above all, the speed. High film transport speeds in the range of up to 1000 mm per second can be employed.
    Type: Application
    Filed: May 3, 2004
    Publication date: November 25, 2004
    Inventor: Jie-Wei Chen
  • Publication number: 20040154737
    Abstract: A method for joining workpieces made from plastic, the upper workpiece, facing a laser source, consisting of a material transparent to the laser beam, and the lower workpiece consisting of a material absorbent to the laser beam, such that the mutually bordering contact surfaces for the two workpieces melt and are joined to one another under pressure during a subsequent cooling, the guiding of the laser beam onto the site to be joined, and the mechanical compression of the workpieces being carried out simultaneously by a machining head. The corresponding device comprises a machining head with focussing devices for the laser beam onto the contact surface, and pressure-exerting devices for compressing the workpieces. A rotatably mounted glass ball or roller is particularly suitable as pressure-exerting device. The invention permits welding quality to be assured in conjunction with flexibility of the welding operation without expensive and complicated damping balls.
    Type: Application
    Filed: September 22, 2003
    Publication date: August 12, 2004
    Inventors: Jie-Wei Chen, Adolf Niederberger
  • Publication number: 20040065406
    Abstract: A method for machining workpieces by means of a laser beam, wherein the workpieces being fixed and subsequently exposed at least partially to the laser beam. A device for machining workpieces, comprises a laser source, a support as lower pressure plate for the workpieces, and a beam-passing upper plate on the workpieces for fixing the workpieces during the machining as upper pressure plate.
    Type: Application
    Filed: September 22, 2003
    Publication date: April 8, 2004
    Inventors: Jie-Wei Chen, Adolf Niederberger
  • Publication number: 20030213552
    Abstract: Process and apparatus for joining endless polymer materials by means of the transillumination technique. According to the invention, in order to be joined, the endless materials are guided through two contrarotating rollers that press against each other. The first roller consists of a material that is transparent to laser beams and is tubular. The second roller is formed from a material that can be deformed easily at the surface, so that its surface can adapt to the shape of the first roller. Devices for producing a laser beam at the contact surface between the materials to be joined are arranged in the first roller. In this case, the beam is formed as a linear laser beam longitudinally with respect to the direction of movement of the materials so that during the passage, continuous heating of the material up to the melting point is achieved, without an excessively high laser output having to be provided. By means of the process and the apparatus, continuous joining is possible at high speed.
    Type: Application
    Filed: June 13, 2002
    Publication date: November 20, 2003
    Inventors: Jie-Wei Chen, Adolf Niederberger
  • Patent number: 6608280
    Abstract: A process and a device for joining or separating various workpieces, in particular made of plastic or plastic and other materials, by means of curtain-like laser beams. To join workpieces in a particular joining area of the contact surface, a mask, made of a laser-impermeable material, is arranged between the laser source and the workpieces to be joined. The laser beam and the mask are moved relative to each other. To generate high energy density in the joining area, laser beams of at least two diode lasers are brought together, and subsequently, differing laser line lengths are generated by means of a zoom optics arrangement.
    Type: Grant
    Filed: May 4, 2002
    Date of Patent: August 19, 2003
    Assignee: Leister Process Technologies
    Inventors: Jie-Wei Chen, Christiane Leister
  • Patent number: 6465757
    Abstract: A method and a device for laser joining of plastics or for joining plastics to other materials, which are brought into contact with pressure, with the workpiece closest to the laser beam source being largely transparent for the laser beam, and the second workpiece being as absorbent as possible. By producing a laser beam shaped in the form of a line on the contact surface between the workpieces and by a relative movement of the laser beam relative to the workpieces, designed according to the desired joint seam structure, the workpieces are bonded together accurately only in the desired joining areas. This permits a highly accurate bonding with the smallest possible joint seam distances, so that even parts for micro-systems engineering can also be produced with a short cycle time.
    Type: Grant
    Filed: January 20, 2000
    Date of Patent: October 15, 2002
    Assignee: Leister Process Technologies
    Inventor: Jie-Wei Chen