Patents Assigned to Institute of Paper Science and Technology
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Patent number: 6933038Abstract: The present invention relates to a method for reinforcing mineral-based materials using reinforced fiber material. More particularly, the present invention relates a method for more uniformly dispensing a fiber material with a mineral-based material, such as cement paste.Type: GrantFiled: November 6, 2001Date of Patent: August 23, 2005Assignee: Institute of Paper Science and Technology, Inc.Inventors: Hiroki Nanko, Kimberly E. Kurtis
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Publication number: 20050112981Abstract: The present invention relates to a method for reinforcing mineral-based materials using reinforced fiber material. More particularly, the present invention relates a method for more uniformly dispensing a fiber material with a mineral-based material, such as cement paste.Type: ApplicationFiled: October 26, 2004Publication date: May 26, 2005Applicants: Institute of Paper Science and Technology, Inc., Georgia Tech Research CorporationInventors: Hiroki Nanko, Kimberly Kurtis
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Patent number: 6610175Abstract: Methods and apparatus to enhance paper and board forming qualities with insert tubes and/or a diffuser block in the paper forming machine headbox component which generates vorticity in the machine direction (MD) which is superimposed on the streamwise flow to generate a swirling or helical flow through the tubes of the diffuser block. Tubes of the diffuser block are designed such that the direction of the swirl or fluid rotation of the paper fiber stock may be controlled and the direction thereof is controlled in such a way to provide effective mixing, coalescence and merging of the jets of fluid emanating from the tubes into the converging section, i.e., nozzle chamber of the headbox. Also disclosed is the effective mixing of the jets generating cross-machine direction (CD) shear between the rows of jets that form at the outlet of the tubes inside the nozzle chamber of the headbox to align paper fibers in the cross-machine direction.Type: GrantFiled: July 24, 2002Date of Patent: August 26, 2003Assignee: Institute of Paper Science and Technology, Inc.Inventor: Cyrus K. Aidun
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Publication number: 20030111194Abstract: A system and method for rapidly determining the pulp kappa number through direct measurement of the potassium permanganate concentration in a pulp-permanganate solution using spectrophotometry. Specifically, the present invention uses strong acidification to carry out the pulp-permanganate oxidation reaction in the pulp-permanganate solution to prevent the precipitation of manganese dioxide (MnO2). Consequently, spectral interference from the precipitated MnO2 is eliminated and the oxidation reaction becomes dominant. The spectral intensity of the oxidation reaction is then analyzed to determine the pulp kappa number.Type: ApplicationFiled: September 3, 2002Publication date: June 19, 2003Applicant: Institute of Paper Science and Technology, Inc.Inventors: Xin-Sheng Chai, Jun Yong Zhu
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Patent number: 6572733Abstract: System and method for oxidizing contaminants to alter specific properties, such as tack, of contaminants. The present invention reduces the tack of the stickies and pitch by exposing the materials for a short duration to low-energy pulsed electrical discharges between a pair of electrodes that are submerged in a liquid medium, such as a fiber stream, water, a pulp slurry, or whitewater. An electrical discharge in the liquid medium oxidizes materials, which may be dissolved or suspended therein, such as stickies, pitch, sulfide, ink, toner, and other substances, thereby reducing tack, odor, and/or zeta potential, as well as producing other desirable effect.Type: GrantFiled: September 26, 2001Date of Patent: June 3, 2003Assignee: Institute of Paper Science And Technology, Inc.Inventor: Sujit Banerjee
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Publication number: 20030089477Abstract: A system and method for altering the tack of a material, namely a polymer used as an adhesive, also known as stickies, or pitch. The present invention reduces the tack of the stickies and pitch by exposing the materials for a short duration to low-energy pulsed electrical discharges between a pair of electrodes that are submerged in a liquid medium, such as a fiber stream, water, a pulp slurry, or whitewater.Type: ApplicationFiled: December 18, 2002Publication date: May 15, 2003Applicant: Institute of paper science and technologyInventors: Sujit Banerjee, Howard Corcoran
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Publication number: 20030051844Abstract: Methods and apparatus to enhance paper and board forming qualities with insert tubes and/or a diffuser block in the paper forming machine headbox component which generates vorticity in the machine direction (MD) which is superimposed on the streamwise flow to generate a swirling or helical flow through the tubes of the diffuser block. Tubes of the diffuser block are designed such that the direction of the swirl or fluid rotation of the paper fiber stock may be controlled and the direction thereof is controlled in such a way to provide effective mixing, coalescence and merging of the jets of fluid emanating from the tubes into the converging section, i.e., nozzle chamber of the headbox. Also disclosed is the effective mixing of the jets generating cross-machine direction (CD) shear between the rows of jets that form at the outlet of the tubes inside the nozzle chamber of the headbox to align paper fibers in the cross-machine direction.Type: ApplicationFiled: July 24, 2002Publication date: March 20, 2003Applicant: Institute of Paper Science and Technology, Inc.Inventor: Cyrus K. Aidun
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Patent number: 6521134Abstract: A system and method for altering the tack of a material, namely a polymer used as an adhesive, also known as stickies, or pitch. The present invention reduces the tack of the stickies and pitch by exposing the materials for a short duration to low-energy pulsed electrical discharges between a pair of electrodes that are submerged in a liquid medium, such as a fiber stream, water, a pulp slurry, or whitewater.Type: GrantFiled: May 10, 2000Date of Patent: February 18, 2003Assignee: Institute of Paper Science and Technology, Inc.Inventors: Sujit Banerjee, Howard Corcoran
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Patent number: 6492174Abstract: The present invention provides methods for initiating embryogenic cultures of plants. The methods include the use of novel media compositions and elevated atmospheric pressure treatments to improve the frequency of embryogenic culture initiation. The methods are well suited for initiating embryogenic cultures in recalcitrant conifer varieties. The method is also well suited for producing somatic embryos that can be further cultured to produce large numbers of plants. Further, the invention provides novel methods that may be used to enhance somatic embryogenesis in a broad range of species.Type: GrantFiled: October 11, 2000Date of Patent: December 10, 2002Assignee: Institute of Paper Science & TechnologyInventors: Gerald S. Pullman, Gary Peter
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Patent number: 6470597Abstract: A process and an apparatus for removing water from a material are disclosed. The material can be selected from the group consisting of fibrous webs, textiles, plastics, non-woven webs, building materials, or any combination thereof, and may comprise an agricultural product, a food product, a pharmaceutical product, a biotechnology product, etc. The process comprises providing a material; providing an oscillatory flow-reversing impingement gaseous media having predetermined frequency; providing a gas-distributing system designed to emit the oscillatory flow-reversing impingement gas onto the material; and impinging the oscillatory flow-reversing gas onto the material, thereby removing moisture from the material.Type: GrantFiled: May 3, 2000Date of Patent: October 29, 2002Assignee: Institute of Paper Science and Technology, Inc.Inventor: Gordon Keith Stipp
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Publication number: 20020148585Abstract: Methods and apparatus to enhance paper and board forming qualities with insert tubes and/or a diffuser block in the paper forming machine headbox component which generates vorticity in the machine direction (MD) which is superimposed on the streamwise flow to generate a swirling or helical flow through the tubes of the diffuser block. Tubes of the diffuser block are designed such that the direction of the swirl or fluid rotation of the paper fiber stock may be controlled and the direction thereof is controlled in such a way to provide effective mixing, coalescence and merging of the jets of fluid emanating from the tubes into the converging section, i.e., nozzle chamber of the headbox. Also disclosed is the effective mixing of the jets generating cross-machine direction (CD) shear between the rows of jets that form at the outlet of the tubes inside the nozzle chamber of the headbox to align paper fibers in the cross-machine direction.Type: ApplicationFiled: April 12, 2002Publication date: October 17, 2002Applicant: Institute of Paper Science and Technology, Inc.Inventor: Cyrus K. Aidun
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Patent number: 6462257Abstract: The present invention provides novel vicilin-like gene promoters. The promoter of the present invention may be operably linked to a desired sequence such as a gene or fragment thereof. A promoter-gene construct is also embodied by the present invention. Methods of producing and expressing polypeptides in plants are also provided. The present invention further provides methods for monitoring the embryo development of conifers.Type: GrantFiled: June 1, 1999Date of Patent: October 8, 2002Assignee: Institute of Paper Science and Technology, Inc.Inventors: Ranjan Perera, John Cairney, Gerald S. Pullman
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Publication number: 20020119258Abstract: System and method for diffusing chemicals rapidly and evenly into and through fibrous material, such as wood. Chemicals are introduced into the fibrous material by applying the chemicals to the fibrous material. After treating the fibrous material with the chemicals, the fibrous material is maintained under low-headspace conditions. Thermal energy or dielectric heating, such as microwave or radio frequency energy, is applied to the fibrous material. As a result, the chemicals are able to distribute evenly and quickly throughout the fibrous material.Type: ApplicationFiled: April 24, 2002Publication date: August 29, 2002Applicant: Institute of Paper Science and Technology, Inc.Inventors: Sujit Banerjee, Earl Malcolm
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Publication number: 20020117285Abstract: Methods and apparatus to enhance paper and board forming qualities with insert tubes and/or a diffuser block in the paper forming machine headbox component which generates vorticity in the machine direction (MD) which is superimposed on the streamwise flow to generate a swirling or helical flow through the tubes of the diffuser block. Tubes of the diffuser block are designed such that the direction of the swirl or fluid rotation of the paper fiber stock may be controlled and the direction thereof is controlled in such a way to provide effective mixing, coalescence and merging of the jets of fluid emanating from the tubes into the converging section, i.e., nozzle chamber of the headbox. A specific flow inside the headbox distributes the fibers in an isotropic form, i.e., uniform in all directions, in the sheet substantially eliminating the MD preferential fiber orientation to produce an isotropic and uniform sheet.Type: ApplicationFiled: February 7, 2002Publication date: August 29, 2002Applicant: Institute of Paper Science and Technology , Inc.Inventor: Cyrus K. Aidun
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Patent number: 6436486Abstract: System and method for diffusing chemicals rapidly and evenly into and through fibrous material, such as wood. Chemicals are introduced into the fibrous material by applying the chemicals to the fibrous material. After treating the fibrous material with the chemicals, the fibrous material is maintained under low-headspace conditions. Thermal energy or dielectric heating, such as microwave or radio frequency energy, is applied to the fibrous material. As a result, the chemicals are able to distribute evenly and quickly throughout the fibrous material.Type: GrantFiled: May 12, 2000Date of Patent: August 20, 2002Assignee: Institute of Paper Science and Technology, Inc.Inventors: Sujit Banerjee, Earl Malcolm
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Patent number: 6425984Abstract: Methods and apparatus to enhance paper and board forming qualities with insert tubes and/or a diffuser block in the paper forming machine headbox component which generates vorticity in the machine direction (MD) which is superimposed on the streamwise flow to generate a swirling or helical flow through the tubes of the diffuser block. Tubes of the diffuser block are designed such that the direction of the swirl or fluid rotation of the paper fiber stock may be controlled and the direction thereof is controlled in such a way to provide effective mixing, coalescence and merging of the jets of fluid emanating from the tubes into the converging section, i.e., nozzle chamber of the headbox. Also disclosed is the effective mixing of the jets generating cross-machine direction (CD) shear between the rows of jets that form at the outlet of the tubes inside the nozzle chamber of the headbox to align paper fibers in the cross-machine direction.Type: GrantFiled: April 4, 2001Date of Patent: July 30, 2002Assignee: Institute of Paper Science and Technology, Inc.Inventor: Cyrus K. Aidun
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Patent number: 6406595Abstract: Methods and apparatus to enhance paper and board forming qualities with insert tubes and/or a diffuser block in the paper forming machine headbox component which generates vorticity in the machine direction (MD) which is superimposed on the streamwise flow to generate a swirling or helical flow through the tubes of the diffuser block. Tubes of the diffuser block are designed such that the direction of the swirl or fluid rotation of the paper fiber stock may be controlled and the direction thereof is controlled in such a way to provide effective mixing, coalescence and merging of the jets of fluid emanating from the tubes into the converging section, i.e., nozzle chamber of the headbox. Also disclosed is the effective mixing of the jets generating cross-machine direction (CD) shear between the rows of jets that form at the outlet of the tubes inside the nozzle chamber of the headbox to align paper fibers in the cross-machine direction.Type: GrantFiled: August 25, 2000Date of Patent: June 18, 2002Assignee: Institute of Paper Science and Technology, Inc.Inventor: Cyrus K. Aidun
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Patent number: 6387211Abstract: The present invention provides methods for reducing fluorescence in a paper-containing sample. Methods for destroying fluorescent whitening agents in a paper-containing sample are also provided.Type: GrantFiled: June 25, 2001Date of Patent: May 14, 2002Assignee: Institute of Paper Science and Technology, Inc.Inventors: Fadi Selim Chakar, Arthur Jonas Ragauskas
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Patent number: 6368460Abstract: Methods and apparatus to enhance paper and board forming qualities with insert tubes and/or a diffuser block in the paper forming machine headbox component which generates vorticity in the machine direction (MD) which is super imposed on the streamwise flow to generate a swirling or helical flow through the tubes of the diffuser block. Tubes of the diffuser block are designed such that the direction of the swirl or fluid rotation of the paper fiber stock may be controlled and the direction thereof is controlled in such a way to provide effective mixing, coalescence and merging of the jets of fluid emanating from the tubes into the converging section, i.e., nozzle chamber of the headbox. A specific flow inside the headbox distributes the fibers in an isotropic form, i.e., uniform in all directions, in the sheet substantially eliminating the MD preferential fiber orientation to produce an isotropic and uniform sheet.Type: GrantFiled: December 11, 2000Date of Patent: April 9, 2002Assignee: Institute of Paper Science and Technology, Inc.Inventor: Cyrus K. Aidun
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Patent number: 6365240Abstract: The present invention is directed to a method for removal of VOCs from wood products prior to drying the wood products. The method of the invention includes the steps of providing a chamber having an opening for receiving wood and loading the chamber with green wood. The wood is loaded to an extent sufficient to provide a limited headspace in the chamber. The chamber is then closed and the wood is heated in the chamber for a time and at a temperature sufficient to saturate the headspace with moisture and to substantially transfer VOCs from the wood product to the moisture in the headspace.Type: GrantFiled: January 26, 2000Date of Patent: April 2, 2002Assignee: Institute of Paper Sciences and Technology, Inc.Inventors: Sujit Banerjee, James Robert Boerner, Wei Su