Patents by Inventor Kareem Tawil
Kareem Tawil 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).
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Publication number: 20240075530Abstract: A valve configured to control flow of a material therethrough includes a body having a bore formed axially therethrough. The valve also includes a cooler positioned at least partially around or within the body. The cooler is configured to cool the material to below a melting point of the material to form a solid plug within the body to prevent the material from flowing therethrough. The valve also includes a heater positioned at least partially around or within the body. The heater is configured to re-heat the material to above the melting point of the material to allow the material to flow therethrough.Type: ApplicationFiled: September 7, 2022Publication date: March 7, 2024Applicant: XEROX CORPORATIONInventors: Kareem Tawil, Christopher T. Chungbin
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Publication number: 20240058870Abstract: A nozzle for a 3D printer includes a structure and a layer positioned at least partially within the structure. The layer is configured to decrease a settling time of a meniscus of a printing material after a drop of the printing material is ejected from the nozzle.Type: ApplicationFiled: August 17, 2022Publication date: February 22, 2024Applicant: XEROX CORPORATIONInventor: Kareem Tawil
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Publication number: 20240058866Abstract: A method includes forming or positioning a layer within a nozzle of a 3D printer. The layer is configured to decrease a settling time of a meniscus of a printing material after a drop of the printing material is ejected from the nozzle.Type: ApplicationFiled: August 17, 2022Publication date: February 22, 2024Applicant: XEROX CORPORATIONInventor: Kareem Tawil
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Patent number: 11883879Abstract: A 3D printer includes an ejector configured to receive a build material. The 3D printer also includes a valve configured to control flow of the build material into or through the ejector. The valve includes a cooler configured to cool the build material to below a melting point of the build material to form a solid plug to prevent the build material from flowing therethrough. The valve also includes a heater configured to re-heat the build material to above the melting point to allow the build material to flow therethrough. The 3D printer also includes a nozzle positioned downstream from the valve. The build material is ejected through the nozzle. The 3D printer also includes a substrate positioned below the nozzle. The build material lands on the substrate and cools and solidifies thereon to form a 3D object.Type: GrantFiled: September 7, 2022Date of Patent: January 30, 2024Assignee: ADDITIVE TECHNOLOGIES, LLCInventors: Kareem Tawil, Christopher T. Chungbin
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Patent number: 11745265Abstract: A three-dimensional (3D) metal object manufacturing apparatus is equipped with a liquid silicate application system to apply liquid silicate to a surface of a build platform prior to manufacture of a metal object. The liquid silicate layer is permitted to air dry and then the platform is heated to its operational temperature range for formation of a metal object with melted metal drops ejected by the apparatus. The liquid silicate layer forms a glassy, brittle layer on which the metal object is formed. This brittle layer is removed relatively easily with the object after the object is manufactured and the build platform is permitted to cool. The silicate layer improves the wetting of the surfaces of build platforms made with non-wetting materials, such as oxidized steel, while also preventing metal-to-metal welds with wetting materials, such as tungsten or nickel.Type: GrantFiled: December 2, 2021Date of Patent: September 5, 2023Assignee: Xerox CorporationInventors: Collin A. Ladd, Paul J. McConville, Mariusz Mika, Kareem Tawil
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Publication number: 20230256749Abstract: A dross extraction system for a printer is disclosed. The dross extraction system includes an ejector defining an inner cavity associated therewith, the inner cavity retaining a liquid printing material. The dross extraction system also includes an inlet coupled to the inner cavity and a conduit external to the ejector having a distal opening, positionable to contact the liquid printing material to attract dross therein, thereby extracting dross from the liquid printing material when a negative pressure is introduced between an internal volume of the conduit and the dross.Type: ApplicationFiled: February 16, 2022Publication date: August 17, 2023Applicant: XEROX CORPORATIONInventors: Joseph C. SHEFLIN, Chu-Heng LIU, Paul J. McCONVILLE, Joshua S. HILTON, Kareem TAWIL, Brian M. BALTHASAR, Christopher T. CHUNGBIN
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Patent number: 11697296Abstract: A printing system comprises a print fluid deposition assembly, a media transport device, and an air flow control system. The print fluid deposition assembly comprises a carrier plate and a printhead arranged to eject a print fluid through an opening of the carrier plate to a deposition region. The media transport device comprises a movable support surface to transport a print medium along a process direction through the deposition region, the media transport device holding the print medium against the movable support surface by vacuum suction. The air flow control system is arranged to selectively flow air through the opening of the carrier plate between the carrier plate and the printhead based on a location of a print medium transported by the media transport device relative to the printhead.Type: GrantFiled: March 29, 2021Date of Patent: July 11, 2023Assignee: Xerox CorporationInventors: Douglas K. Herrmann, Linn C. Hoover, Patrick Jun Howe, Joseph C. Sheflin, Robert Jian Zhang, John Patrick Baker, Brian M. Balthasar, Glenn Batchelor, Anthony Salvatore Condello, Ali R. Dergham, Timothy P. Foley, Richard A. Kalb, Peter John Knausdorf, Jason M. LeFevre, Jack T. Lestrange, Chu-Heng Liu, Paul J. McConville, Seemit Praharaj, Palghat S. Ramesh, Erwin Ruiz, Emmett James Spence, Rachel Lynn Tanchak, Kareem Tawil, Carlos M. Terrero, Megan Zielenski
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Publication number: 20230182201Abstract: A method includes ejecting a plurality of drops of a build material from a nozzle of a 3D printer. The build material cools and solidifies after being ejected to form a 3D object. The method also includes controlling an oxidation of the drops, the 3D object or both to create different oxidation levels in first and second portions of the 3D object.Type: ApplicationFiled: February 8, 2023Publication date: June 15, 2023Applicant: XEROX CORPORATIONInventors: Viktor Sukhotskiy, David A. Mantell, Palghat S. Ramesh, Kareem Tawil, Alexander J. Fioravanti, Dinesh Krishna Kumar Jayabal
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Publication number: 20230173580Abstract: A three-dimensional (3D) metal object manufacturing apparatus is equipped with a liquid silicate application system to apply liquid silicate to a surface of a build platform prior to manufacture of a metal object. The liquid silicate layer is permitted to air dry and then the platform is heated to its operational temperature range for formation of a metal object with melted metal drops ejected by the apparatus. The liquid silicate layer forms a glassy, brittle layer on which the metal object is formed. This brittle layer is removed relatively easily with the object after the object is manufactured and the build platform is permitted to cool. The silicate layer improves the wetting of the surfaces of build platforms made with non-wetting materials, such as oxidized steel, while also preventing metal-to-metal welds with wetting materials, such as tungsten or nickel.Type: ApplicationFiled: December 2, 2021Publication date: June 8, 2023Inventors: Collin A. Ladd, Paul J. McConville, Mariusz Mika, Kareem Tawil
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Patent number: 11623458Abstract: A printing system comprises a print fluid deposition assembly, a media transport device, and an air flow control system. The print fluid deposition assembly comprises a printhead to eject a print fluid through an opening of a carrier plate to a deposition region. The media transport device holds a print medium against the movable support surface by vacuum suction and transports the print medium through the deposition region. The air flow control system is to flow air through the carrier plate to the movable support surface via a port through the carrier plate on an inboard side the carrier plate and to control a flow rate of the air flowed through the port based on a size of a print medium transported by the media transport device.Type: GrantFiled: March 29, 2021Date of Patent: April 11, 2023Assignee: Xerox CorporationInventors: Linn C. Hoover, Erwin Ruiz, Rachel Lynn Tanchak, Kareem Tawil, Carlos M. Terrero
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Patent number: 11607724Abstract: A three-dimensional (3D) printer includes an ejector and a heating element configured to heat a solid printing material in the ejector, thereby causing the solid printing material to change to a liquid printing material within the ejector. The 3D printer also includes a coil wrapped at least partially around the ejector. The 3D printer also includes a power source configured to supply one or more pulses of power to the coil, which cause one or more drops of the liquid printing material to flow out of the ejector through a nozzle of the ejector. The 3D printer also includes a gas-controlling device configured to control a gas in the 3D printer.Type: GrantFiled: August 12, 2020Date of Patent: March 21, 2023Assignee: XEROX CORPORATIONInventors: Viktor Sukhotskiy, David A. Mantell, Palghat S. Ramesh, Kareem Tawil, Alexander J. Fioravanti, Dinesh Krishna Kumar Jayabal
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Patent number: 11565475Abstract: A method operates a three-dimensional (3D) metal object manufacturing system to compensate for errors that occur during object formation. In the method, thermal image data and dimensional image data of a metal object being formed by the 3D metal object manufacturing system is generated prior to completion of the metal object. Thermal conditions are identified from these data and compared to predetermined ranges corresponding to the identified thermal conditions to identify one or more errors. For identified errors outside a corresponding predetermined difference range, the method performs an error compensation technique. The error compensation includes modification of a surface data model, modification of machine-ready instructions, or operation of a subtractive device.Type: GrantFiled: April 10, 2020Date of Patent: January 31, 2023Assignee: Xerox CorporationInventors: David A. Mantell, Christopher T. Chungbin, Chu-Heng Liu, Scott J. Vader, Zachary S. Vader, Viktor Sukhotskiy, Denis Cormier, Kareem Tawil
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Patent number: 11483442Abstract: A method is disclosed. For example, the method executed by a processor of a multi-function device (MFD) includes monitoring operating parameters of a component in the MFD, calculating a life set point for the component based on the operating parameters, and changing a default life set point for the component stored in a memory of the MFD to the life set point that is calculated based on the operating parameters.Type: GrantFiled: December 22, 2020Date of Patent: October 25, 2022Assignee: Xerox CorporationInventors: Rachel Lynn Tanchak, Erwin Ruiz, Carlos M. Terrero, Kareem Tawil, Linn C. Hoover
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Publication number: 20220305815Abstract: A printing system comprises a print fluid deposition assembly, a media transport device, and an air flow control system. The print fluid deposition assembly comprises a carrier plate and a printhead arranged to eject a print fluid through an opening of the carrier plate to a deposition region. The media transport device comprises a movable support surface to transport a print medium along a process direction through the deposition region, the media transport device holding the print medium against the movable support surface by vacuum suction. The air flow control system is arranged to selectively flow air through the opening of the carrier plate between the carrier plate and the printhead based on a location of a print medium transported by the media transport device relative to the printhead.Type: ApplicationFiled: March 29, 2021Publication date: September 29, 2022Applicant: XEROX CORPORATIONInventors: Douglas K. HERRMANN, Linn C. HOOVER, Patrick Jun HOWE, Joseph C. SHEFLIN, Robert Jian ZHANG, John Patrick BAKER, Brian M. BALTHASAR, Glenn BATCHELOR, Anthony Salvatore CONDELLO, Ali R. DERGHAM, Timothy P. FOLEY, Richard A. KALB, Peter John KNAUSDORF, Jason M. LeFEVRE, Jack T. LESTRANGE, Chu-Heng LIU, Paul J. McCONVILLE, Seemit PRAHARAJ, Palghat S. RAMESH, Erwin RUIZ, Emmett James SPENCE, Rachel Lynn TANCHAK, Kareem TAWIL, Carlos M. TERRERO, Megan ZIELENSKI
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Publication number: 20220305818Abstract: A printing system comprises a print fluid deposition assembly, a media transport device, and an air flow control system. The print fluid deposition assembly comprises a printhead to eject a print fluid through an opening of a carrier plate to a deposition region. The media transport device holds a print medium against the movable support surface by vacuum suction and transports the print medium through the deposition region. The air flow control system is to flow air through the carrier plate to the movable support surface via a port through the carrier plate on an inboard side the carrier plate and to control a flow rate of the air flowed through the port based on a size of a print medium transported by the media transport device.Type: ApplicationFiled: March 29, 2021Publication date: September 29, 2022Applicant: XEROX CORPORATIONInventors: Linn C. HOOVER, Erwin RUIZ, Rachel Lynn TANCHAK, Kareem TAWIL, Carlos M. TERRERO
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Publication number: 20220201131Abstract: A method is disclosed. For example, the method executed by a processor of a multi-function device (MFD) includes monitoring operating parameters of a component in the MFD, calculating a life set point for the component based on the operating parameters, and changing a default life set point for the component stored in a memory of the MFD to the life set point that is calculated based on the operating parameters.Type: ApplicationFiled: December 22, 2020Publication date: June 23, 2022Inventors: Rachel Lynn Tanchak, Erwin Ruiz, Carlos M. Terrero, Kareem Tawil, Linn C. Hoover
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Publication number: 20210046541Abstract: A three-dimensional (3D) printer includes an ejector and a heating element configured to heat a solid printing material in the ejector, thereby causing the solid printing material to change to a liquid printing material within the ejector. The 3D printer also includes a coil wrapped at least partially around the ejector. The 3D printer also includes a power source configured to supply one or more pulses of power to the coil, which cause one or more drops of the liquid printing material to flow out of the ejector through a nozzle of the ejector. The 3D printer also includes a gas-controlling device configured to control a gas in the 3D printer.Type: ApplicationFiled: August 12, 2020Publication date: February 18, 2021Applicant: XEROX CORPORATIONInventors: Viktor Sukhotskiy, David A. Mantell, Palghat S. Ramesh, Kareem Tawil, Alexander J. Fioravanti, Dinesh Krishna Kumar Jayabal
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Publication number: 20200324486Abstract: A method operates a three-dimensional (3D) metal object manufacturing system to compensate for errors that occur during object formation. In the method, thermal image data and dimensional image data of a metal object being formed by the 3D metal object manufacturing system is generated prior to completion of the metal object. Thermal conditions are identified from these data and compared to predetermined ranges corresponding to the identified thermal conditions to identify one or more errors. For identified errors outside a corresponding predetermined difference range, the method performs an error compensation technique. The error compensation includes modification of a surface data model, modification of machine-ready instructions, or operation of a subtractive device.Type: ApplicationFiled: April 10, 2020Publication date: October 15, 2020Inventors: David A. Mantell, Christopher T. Chungbin, Chu-Heng Liu, Scott J. Vader, Zachary S. Vader, Viktor Sukhotskiy, Denis Cormier, Kareem Tawil