Patents by Inventor Peter W. Hart
Peter W. Hart 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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Patent number: 11629460Abstract: A fiber blend includes a first amount of wood pulp fibers refined in an amount of at least about 150 kWh per metric ton of gross refining energy, and a second amount of wood pulp fibers refined in an amount of at most about 10 kWh per metric ton of gross refining energy.Type: GrantFiled: February 24, 2021Date of Patent: April 18, 2023Assignee: WestRock MWV, LLCInventors: Humphrey J. Moynihan, Peter W. Hart, Nichole Kilgore, John D. DeJarnette
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Publication number: 20230073443Abstract: A method for manufacturing bleached pulp from a feedstock that includes recycled paper. The method includes steps of: (1) impregnating the feedstock with cooking liquor to yield an impregnated material having a liquor-to-fiber mass ratio of at most about 4:1; (2) cooking the impregnated material to remove at least a portion of the lignin within the impregnated material, thereby yielding a cooked pulp; and (3) bleaching the cooked pulp.Type: ApplicationFiled: December 9, 2020Publication date: March 9, 2023Inventors: Peter W. HART, John D. DEJARNETTE, Fritz G. PAULSEN, Ashok K. GHOSH
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Publication number: 20220074139Abstract: A pulping method includes chemical cooking of softwood chips to retain a high lignin content of about 18% to about 28% by weight and fiberization of the cooked softwood chips to a low residual wood shive content of at most 15% by weight.Type: ApplicationFiled: September 8, 2021Publication date: March 10, 2022Inventors: Fritz G. PAULSEN, John D. DEJARNETTE, Peter W. HART
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Publication number: 20210180252Abstract: A fiber blend includes a first amount of wood pulp fibers refined in an amount of at least about 150 kWh per metric ton of gross refining energy, and a second amount of wood pulp fibers refined in an amount of at most about 10 kWh per metric ton of gross refining energy.Type: ApplicationFiled: February 24, 2021Publication date: June 17, 2021Applicant: WestRock MWV, LLCInventors: Humphrey J. Moynihan, Peter W. Hart, Nichole Kilgore, John D. DeJarnette
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Patent number: 10975520Abstract: The present disclosure relates to producing paper or paperboard having improved stiffness and strength, compared to the conventional paperboard at the same basis weight. It also discloses a method of wood pulping having a significantly increased yield and providing fiber pulps with enhanced properties such as strength and stiffness. Wood chips are chemically pulped to a high kappa number, providing a rejects component and an accepts component. The rejects component is subjected to a substantially mechanical pulping process, optionally in a presence of bleaching agent, prior to blending back into the accepts component. The resulting fiber blend is washed, optionally bleached, and subjected to a papermaking process to provide paper or paperboard with enhanced strength and stiffness at low basis weight.Type: GrantFiled: July 24, 2018Date of Patent: April 13, 2021Assignee: WestRock MWV, LLCInventors: Peter W. Hart, Darrell M. Waite, Dale E. Nutter, Jr., Jared Bradberry
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Patent number: 10961659Abstract: A fiber blend includes a first amount of wood pulp fibers refined in an amount of at least about 150 kWh per metric ton of gross refining energy, and a second amount of wood pulp fibers refined in an amount of at most about 10 kWh per metric ton of gross refining energy.Type: GrantFiled: August 8, 2019Date of Patent: March 30, 2021Assignee: WestRock MWV, LLCInventors: Humphrey J. Moynihan, Peter W. Hart, Nichole Kilgore, John D. DeJarnette
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Publication number: 20200048833Abstract: A fiber blend includes a first amount of wood pulp fibers refined in an amount of at least about 150 kWh per metric ton of gross refining energy, and a second amount of wood pulp fibers refined in an amount of at most about 10 kWh per metric ton of gross refining energy.Type: ApplicationFiled: August 8, 2019Publication date: February 13, 2020Inventors: Humphrey J. Moynihan, Peter W. Hart, Nichole Kilgore, John D. DeJarnette
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Publication number: 20190119854Abstract: Dry processing of cellulose fibers in an attritor mill produces small cellulose particles with properties useful for increasing the bulk of paperboard products. In contrast with the usual behaviour of small particles, the dry attritor-processed particles exhibit a further benefit of good drainage on a paper machine. Comparisons are made for the modulus, smoothness, and density of paperboard made with and without the dry-attrited cellulose particles.Type: ApplicationFiled: May 15, 2017Publication date: April 25, 2019Inventors: David E. Knox, Peter W. Hart, Humphery J. Moynihan, Nichole Kilgore
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Publication number: 20180347110Abstract: The present disclosure relates to producing paper or paperboard having improved stiffness and strength, compared to the conventional paperboard at the same basis weight. It also discloses a method of wood pulping having a significantly increased yield and providing fiber pulps with enhanced properties such as strength and stiffness. Wood chips are chemically pulped to a high kappa number, providing a rejects component and an accepts component. The rejects component is subjected to a substantially mechanical pulping process, optionally in a presence of bleaching agent, prior to blending back into the accepts component. The resulting fiber blend is washed, optionally bleached, and subjected to a papermaking process to provide paper or paperboard with enhanced strength and stiffness at low basis weight.Type: ApplicationFiled: July 24, 2018Publication date: December 6, 2018Inventors: Peter W. Hart, Darrell M. Waite, Dale E. Nutter, Jr., Jared Bradberry
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Patent number: 10060075Abstract: The present disclosure relates to producing paper or paperboard having improved stiffness and strength, compared to the conventional paperboard at the same basis weight. It also discloses a method of wood pulping having a significantly increased yield and providing fiber pulps with enhanced properties such as strength and stiffness. Wood chips are chemically pulped to a high kappa number, providing a rejects component and an accepts component. The rejects component is subjected to a substantially mechanical pulping process, optionally in a presence of bleaching agent, prior to blending back into the accepts component. The resulting fiber blend is washed, optionally bleached, and subjected to a papermaking process to provide paper or paperboard with enhanced strength and stiffness at low basis weight.Type: GrantFiled: April 6, 2015Date of Patent: August 28, 2018Assignee: WestRock MWV, LLCInventors: Peter W. Hart, Darrell M. Waite, Dale E. Nutter, Jr., Jared Bradberry
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Patent number: 10000889Abstract: A method of wood pulping having a significantly increased yield is disclosed. Wood chips are chemically pulped to a high kappa number, providing a first accepts component and a first rejects component. The first rejects component is subjected to a high consistency pulping process such as a substantially mechanical pulping process to generate a second accepts component and a second rejects component. The first accepts component may be used in the production of saturating kraft paper with excellent saturability and resin pick up. The second accepts may be used as a second fiber source in the production of multiply linerboard and unbleached paperboard with enhanced stiffness, strength, and smoothness. Alternatively, the first accepts component may be blended with the second accepts component to produce fiber blends, which may be used in a production of paper-based products having enhanced strength and stiffness at low basis weight.Type: GrantFiled: April 6, 2015Date of Patent: June 19, 2018Assignee: WestRock MWV, LLCInventors: Peter W. Hart, Darrell M. Waite, Dale E. Nutter, Jr., Jared Bradberry
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Publication number: 20160333529Abstract: A method of wood pulping having a significantly increased yield is disclosed. Wood chips are chemically pulped to a high kappa number, providing a first accepts component and a first rejects component. The first rejects component is subjected to a high consistency pulping process such as a substantially mechanical pulping process to generate a second accepts component and a second rejects component. The first accepts component may be used in the production of saturating kraft paper with excellent saturability and resin pick up. The second accepts may be used as a second fiber source in the production of multiply linerboard and unbleached paperboard with enhanced stiffness, strength, and smoothness. Alternatively, the first accepts component may be blended with the second accepts component to produce fiber blends, which may be used in a production of paper-based products having enhanced strength and stiffness at low basis weight.Type: ApplicationFiled: April 6, 2015Publication date: November 17, 2016Inventors: Peter W. HART, Darrell M. WAITE, Dale E. NUTTER, JR., Jared BRADBERRY
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Publication number: 20150211188Abstract: A method of wood pulping having a significantly increased yield is disclosed. Wood chips are chemically pulped to a high kappa number, providing a first accepts component and a first rejects component. The first rejects component is subjected to a high consistency pulping process such as a substantially mechanical pulping process to generate a second accepts component and a second rejects component. The first accepts component may be used in the production of saturating kraft paper with excellent saturability and resin pick up. The second accepts may be used as a second fiber source in the production of multiply linerboard and unbleached paperboard with enhanced stiffness, strength, and smoothness. Alternatively, the first accepts component may be blended with the second accepts component to produce fiber blends, which may be used in a production of paper-based products having enhanced strength and stiffness at low basis weight.Type: ApplicationFiled: April 6, 2015Publication date: July 30, 2015Inventors: Peter W. HART, Darrell M. WAITE, Dale E. NUTTER, JR., Jared BRADBERRY
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Publication number: 20150211184Abstract: The present disclosure relates to producing paper or paperboard having improved stiffness and strength, compared to the conventional paperboard at the same basis weight. It also discloses a method of wood pulping having a significantly increased yield and providing fiber pulps with enhanced properties such as strength and stiffness. Wood chips are chemically pulped to a high kappa number, providing a rejects component and an accepts component. The rejects component is subjected to a substantially mechanical pulping process, optionally in a presence of bleaching agent, prior to blending back into the accepts component. The resulting fiber blend is washed, optionally bleached, and subjected to a papermaking process to provide paper or paperboard with enhanced strength and stiffness at low basis weight.Type: ApplicationFiled: April 6, 2015Publication date: July 30, 2015Inventors: Peter W. HART, Darrell M. WAITE, Dale E. NUTTER, JR., Jared BRADBERRY
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Publication number: 20130306256Abstract: A method for wood pulping including chemically pulping wood chips to a kappa number sufficient to generate a first amount of pulp including a first accepts component and 6 to 50 percent by weight of the first amount of pulp of a first rejects component, separating the first accepts component from the first rejects component, performing a high consistency, substantially mechanical pulping of the first rejects component to generate a second amount of pulp including a second accepts component and a second rejects component, and separating the second accepts component from the second rejects component.Type: ApplicationFiled: July 31, 2013Publication date: November 21, 2013Applicant: MeadWestvaco CorporationInventors: Peter W. Hart, Darrell M. Waite, Dale E. Nutter, Jared Bradberry
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Publication number: 20100175840Abstract: A method of wood pulping having a significantly increased yield is disclosed. Wood chips are chemically pulped to a high kappa number, providing a first accepts component and a first rejects component. The first rejects component is subjected to a high consistency pulping process such as a substantially mechanical pulping process to generate a second accepts component and a second rejects component. The first accepts component may be used in the production of saturating kraft paper with excellent saturability and resin pick up. The second accepts may be used as a second fiber source in the production of multiply linerboard and unbleached paperboard with enhanced stiffness, strength, and smoothness. Alternatively, the first accepts component may be blended with the second accepts component to produce fiber blends, which may be used in a production of paper-based products having enhanced strength and stiffness at low basis weight.Type: ApplicationFiled: April 21, 2008Publication date: July 15, 2010Inventors: Peter W. Hart, Darrell M. Waite
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Publication number: 20080308239Abstract: The present disclosure relates to producing paper or paperboard having improved stiffness and strength, compared to the conventional paperboard at the same basis weight. It also discloses a method of wood pulping having a significantly increased yield and providing fiber pulps with enhanced properties such as strength and stiffness. Wood chips are chemically pulped to a high kappa number, providing a rejects component and an accepts component. The rejects component is subjected to a substantially mechanical pulping process, optionally in a presence of bleaching agent, prior to blending back into the accepts component. The resulting fiber blend is washed, optionally bleached, and subjected to a papermaking process to provide paper or paperboard with enhanced strength and stiffness at low basis weight.Type: ApplicationFiled: June 12, 2007Publication date: December 18, 2008Inventors: Peter W. Hart, Darrell M. Waite, Dale E. Nutter