Patents Assigned to International Paper Company
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Patent number: 12146264Abstract: A process for making a paper product comprising: providing a forming fabric; causing the forming fabric to rotate such that an upper surface of the forming fabric moves in a machine direction; providing a multi-layer headbox comprising first and second inlet headers and a slice outlet; providing a first aqueous slurry of first fibers to the first inlet header and a second aqueous slurry of second fibers to the second inlet header; combining streams of the first and second aqueous slurries to define a jet exiting the slice outlet; emitting the jet onto the upper surface of the forming fabric to form a web; causing the forming fabric to oscillate in a direction transverse to the machine direction, whereby at least a significant number of the first fibers are caused to align in a direction that deviates from the machine direction; and forming the paper product from the web.Type: GrantFiled: September 12, 2022Date of Patent: November 19, 2024Assignee: INTERNATIONAL PAPER COMPANYInventor: John Mullaney Meazle
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Patent number: 12077914Abstract: Multiple groups of sensors are circumferentially spaced apart at each cross-directional position along a sensing roll of a nip press to measure and cancel or nearly cancel the effects of rotational variability which may be acting on the sensing roll. The strategically-placed sensors are designed to measure the pressure being placed against the web that is being advanced through the nip press. The average of the measurements of multiple sensors spaced circumferential apart provides a good cancellation of any rotational variability that might be found at a cross-directional position on the sensing roll. In this manner, a more true measurement of the nip pressure profile can be obtained and better adjustments made to reduce nip pressure profile variability. In addition, the nip variability profile may be used as a predictor of cover or bearing failures, resonant frequencies and other roll anomalies.Type: GrantFiled: April 18, 2023Date of Patent: September 3, 2024Assignee: INTERNATIONAL PAPER COMPANYInventor: Kerry D. Figiel
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Patent number: 12077912Abstract: Pulps, cellulose ether products, and methods of making pulps are described.Type: GrantFiled: June 6, 2022Date of Patent: September 3, 2024Assignee: INTERNATIONAL PAPER COMPANYInventors: Mengkui Luo, Michael Rea, Angela Dodd, Andrew Dodd, Amy Anderson-Gaber, Kris Lindenauer, Hugh West, Charles Miller
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Patent number: 12066109Abstract: A seal assembly including: a collar having an opening configured to receive a rotatable shaft, an annular member having an annular opening configured to receive the collar, and first and second end plates fixedly coupled to a respective one of the first and second end surfaces of the collar. An outer surface of the collar includes one or more helical threads. The collar has a first axial length defined between first and second end surfaces of the collar, and the annular member has a second axial length defined between first and second end surfaces of the annular member, in which the second axial length is less than the first axial length. Also provided are an assembly comprising a seal assembly in accordance with the present disclosure and a method for preventing contamination of a sealed chamber.Type: GrantFiled: May 16, 2022Date of Patent: August 20, 2024Assignee: INTERNATIONAL PAPER COMPANYInventor: Steven George Scheer
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Patent number: 11993433Abstract: A container is provided comprising: a bottom panel, at least one top panel, a first side panel, a second side panel, a plurality of front flanges and a plurality of back flanges, wherein the panels and flanges are connected together to define the container. Back lines of separation are formed in the first and second side panels, the at least one top panel and at an interface between the bottom panel and one of the back flanges such that a removable back portion can be separated from a remainder of the container via the back lines of separation so as to create a product exit opening. Front lines of separation are formed in one of the front flanges to define a tab, which is partially separable from a remainder of the one front flange.Type: GrantFiled: January 12, 2022Date of Patent: May 28, 2024Assignee: INTERNATIONAL PAPER COMPANYInventor: Alex Dean Bevier
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Patent number: 11982054Abstract: A refining member including a refining body with a refining surface including first and second refiner bars separated by first and second refiner grooves. The first and second refiner bars extend from respective first and second radially inward positions to respective first and second radially outward positions. The first and second refiner bars have a respective first and second height extending upward from a floor of a respective, adjacent first or second refiner groove. The second height is a minimum height of the second refiner bars and is spaced apart from the second radially inward position, with the second height being at least about 0.35 mm less than the first height. The first refiner bars are adapted to refine wood fibers and the second refiner bars are adapted to break up fiber bundles.Type: GrantFiled: August 22, 2022Date of Patent: May 14, 2024Assignee: INTERNATIONAL PAPER COMPANYInventor: Dwight Edward Anderson
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Patent number: 11965290Abstract: A refining member comprising a refining body with a refining surface comprising first and second refiner bars separated by first and second refiner grooves, respectively. The first refiner bars extend from a radially inward position to a first radially outward position. The second refiner bars extend to a second radially outward position that is nearer to an outermost part of the refining body than the first radially outward position. The second refiner bars have a longitudinal length from about 0.6 cm to about 10 cm. The first and second refiner bars have a respective first and second maximum height extending upward from a floor of a respective, adjacent first or second refiner groove. The second maximum height is at least 0.35 mm less than the first maximum height. The first refiner bars are adapted to refine wood fibers and the second refiner bars are adapted to break up fiber bundles.Type: GrantFiled: May 10, 2021Date of Patent: April 23, 2024Assignee: INTERNATIONAL PAPER COMPANYInventor: Dwight Edward Anderson
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Patent number: 11939332Abstract: Disclosed herein are synthesis methods for coelenterazine. Also disclosed are articles including the coelenterazine and coelenterazine derivatives. Representative absorbent articles include disposable diapers and adult incontinence products.Type: GrantFiled: November 4, 2020Date of Patent: March 26, 2024Assignee: INTERNATIONAL PAPER COMPANYInventors: Rajagopala Reddy Duvvuru, Rama Bhatt, Anil Kumar
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Patent number: 11932990Abstract: Disclosed herein are treated pulp sheets comprising cellulose pulp fibers treated with a densifying agent and having a relatively low moisture content. In certain embodiments, the treated pulp sheets are used to produce fiberized pulp having an unexpectedly low knot content, while maintaining density and softness properties usually associated with similarly treated pulp that is fiberized at higher moisture content. Methods of making fiberized pulp from the treated pulp sheets, as well as products comprising the treated pulp sheets or fiberized pulp from the treated pulp sheets, are also provided.Type: GrantFiled: September 12, 2022Date of Patent: March 19, 2024Assignee: INTERNATIONAL PAPER COMPANYInventor: Andre Stephan Hajnal
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Patent number: 11926624Abstract: Disclosed herein are synthesis methods for coelenterazine and intermediates. Also disclosed are articles including the coelenterazine and coelenterazine derivatives. Representative absorbent articles include disposable diapers and adult incontinence products.Type: GrantFiled: June 23, 2021Date of Patent: March 12, 2024Assignee: INTERNATIONAL PAPER COMPANYInventor: Rajagopala Reddy Duvvuru
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Patent number: 11905658Abstract: A refining member for a pulp refiner comprising a refining body with a refining surface comprising refiner bars separated by refiner grooves and teeth. Each of the refiner bars extend from a radially inward position on the refining surface to a first radially outward position on the refining surface, and the teeth extend to a second radially outward position on the refining surface. The second radially outward position is nearer to an outermost part of the refining body than the first radially outward position. The refiner bars are adapted to refine wood fibers, and the teeth are adapted to break up fiber bundles.Type: GrantFiled: October 6, 2020Date of Patent: February 20, 2024Assignee: INTERNATIONAL PAPER COMPANYInventor: Dwight Edward Anderson
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Patent number: 11834786Abstract: A method for controlling a fiber fractionation system for fractionating an input material into a long fraction (LF) stream comprising LF fibers and a short fraction (SF) stream comprising SF fibers includes measuring an average LF fiber length at one or more locations post-fractionation, and maintaining the average LF fiber length within a target variability range by automatically altering a rotational speed of a rotor of the fiber fractionation system.Type: GrantFiled: December 14, 2020Date of Patent: December 5, 2023Assignee: INTERNATIONAL PAPER COMPANYInventors: Jyrki Tapio Jaakkola, Antti Heikkinen
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Patent number: 11788231Abstract: Paper substrates which incorporate covert marking pigments (CMPs) which are one or more infrared (IR) anti-Stokes pigments. Also, processes for incorporating such CMPs into a paper substrate other than by a printing technique, such as, for example, by using a size press or spraying, as well as processes for identifying the presence of such CMPs incorporated into a paper substrate sheet with an infrared (IR) pigment sensor of, for example, a copier or printer for the purpose of adjusting the quantity of printer pigment deposited on a paper substrate sheet or to determine whether the paper substrate sheet is an authentic or counterfeit document.Type: GrantFiled: June 24, 2019Date of Patent: October 17, 2023Assignee: International Paper CompanyInventors: David Verd Reed, Matthew James Bovee, James D. Regel, Benny Joe Skaggs, Maria A. Dannemiller
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Patent number: 11780637Abstract: A corrugated cardboard blank for making a collapsible container including one or more panels joined to a bottom panel. The bottom panel is divided into first and second sectional panels on opposing sides of an interface comprising perforated portions extending from a first pair of diagonally opposing corners of the bottom panel. Each perforated portion includes an inner end, wherein the inner ends of the perforated portions are longitudinally spaced from each other. First and second fold lines extend diagonally at least partially between a second pair of diagonally opposing corners of the bottom panel and respective perforated portions. A frangible central portion of the interface extends between the inner ends of the perforated portions, wherein a plurality of unbroken flutes of the corrugated material extend laterally across the central portion of the interface.Type: GrantFiled: August 15, 2022Date of Patent: October 10, 2023Assignee: INTERNATIONAL PAPER COMPANYInventor: Alex Dean Bevier
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Patent number: 11725339Abstract: Bleached polyacrylic acid crosslinked cellulose fibers with reduced furfural content are disclosed. The reduced furfural content is accompanied by a strong reduction of malodor associated with crosslinked fibers. Methods of furfural reduction include treatment with hydrogen peroxide in the absence of alkaline or other bleaching agents subsequent to curing polyacrylic acid crosslinked cellulose fibers. Some embodiments of treated polyacrylic acid crosslinked cellulose fibers have a furfural content lower than 1.3 ppm. In some embodiments, the reduction of furfural content of the treated crosslinked fibers compared to untreated crosslinked fibers is at least 55%. in some embodiments, furfural content decreases with aging of the treated crosslinked fibers.Type: GrantFiled: February 11, 2020Date of Patent: August 15, 2023Assignee: INTERNATIONAL PAPER COMPANYInventors: Angel Stoyanov, Joerg Endres, Holger Beruda, Ludwig Busam
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Publication number: 20230212341Abstract: Grafted, crosslinked cellulosic materials include cellulose fibers and polymer chains composed of at least one monoethylenically unsaturated acid group-containing monomer (such as acrylic acid) grafted thereto, in which one or more of said cellulose fibers and said polymer chains are crosslinked (such as by intra-fiber chain-to-chain crosslinks). Some of such materials are characterized by a wet bulk of about 10.0-17.0 cm3/g, an IPRP value of about 1000 to 7700 cm2/MPa·sec, and/or a MAP value of about 7.0 to 38 cm H2O. Methods for producing such materials may include grafting polymer chains from a cellulosic substrate, followed by treating the grafted material with a crosslinking agent adapted to effect crosslinking of one or more of the cellulosic substrate or the polymer chains. Example crosslinking mechanisms include esterfication reactions, ionic reactions, and radical reactions, and example crosslinking agents include pentaerythritol, homopolymers of the graft species monomer, and hyperbranched polymers.Type: ApplicationFiled: February 27, 2023Publication date: July 6, 2023Applicant: INTERNATIONAL PAPER COMPANYInventors: Karen Brogan, Charles E. Miller, Angel Stoyanov, Torsten Lindner, Maike Siemons
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Patent number: 11679908Abstract: A container including a bottom portion and a plurality of peripheral wall portions extending from the bottom portion and defining an interior area of the container. At least one peripheral wall portion has an inner surface including a feature defining an inner ledge extending into the interior area, the inner ledge being located between the bottom portion and an upper edge of the container. The at least one peripheral wall portion has an outer surface including a feature defining an outer ledge located between the bottom portion and the upper edge of the container. The inner ledge is positioned to engage the outer ledge of a similarly-configured container whereby a spacing between a stack of nested containers is defined by the outer ledge of the similarly-configured container seated on the inner ledge of the container.Type: GrantFiled: August 14, 2020Date of Patent: June 20, 2023Assignee: INTERNATIONAL PAPER COMPANYInventor: Alex Dean Bevier
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Patent number: 11643240Abstract: A corrugated cardboard blank for making a collapsible container including one or more panels joined to a bottom panel. The bottom panel is divided into first and second sectional panels on opposing sides of an interface comprising perforated portions extending from a first pair of diagonally opposing corners of the bottom panel. Each perforated portion includes an inner end, wherein the inner ends of the perforated portions are longitudinally spaced from each other. First and second fold lines extend diagonally at least partially between a second pair of diagonally opposing corners of the bottom panel and respective perforated portions. A frangible central portion of the interface extends between the inner ends of the perforated portions, wherein a plurality of unbroken flutes of the corrugated material extend laterally across the central portion of the interface.Type: GrantFiled: October 7, 2019Date of Patent: May 9, 2023Assignee: INTERNATIONAL PAPER COMPANYInventor: Alex Dean Bevier
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Patent number: 11629461Abstract: Multiple groups of sensors are circumferentially spaced apart at each cross-directional position along a sensing roll of a nip press to measure and cancel or nearly cancel the effects of rotational variability which may be acting on the sensing roll. The strategically-placed sensors are designed to measure the pressure being placed against the web that is being advanced through the nip press. The average of the measurements of multiple sensors spaced circumferential apart provides a good cancellation of any rotational variability that might be found at a cross-directional position on the sensing roll. In this manner, a more true measurement of the nip pressure profile can be obtained and better adjustments made to reduce nip pressure profile variability. In addition, the nip variability profile may be used as a predictor of cover or bearing failures, resonant frequencies and other roll anomalies.Type: GrantFiled: February 1, 2021Date of Patent: April 18, 2023Assignee: INTERNATIONAL PAPER COMPANYInventor: Kerry D. Figiel
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Patent number: 11618607Abstract: A leak resistant bliss-type container comprising a first blank defining a bottom wall, opposed first side walls hingedly connected to longitudinal edges of the bottom wall and extending upwardly from the bottom wall, a vertical side flange hingedly connected to each of a pair of opposing lateral edges of the first side walls, and opposing bottom flanges hingedly connected to lateral edges of the bottom wall and extending upwardly in overlapping relation to the vertical side flanges. Second and third identical end blanks are provided, each end blank defining at least an end wall secured in overlapping relation to the vertical side flanges. A corner piece is defined by a web of material, each corner piece extending between a longitudinal edge of one of the vertical side flanges and a longitudinal edge of the bottom flange to define a leak resistant corner.Type: GrantFiled: July 21, 2021Date of Patent: April 4, 2023Assignee: INTERNATIONAL PAPER COMPANYInventor: James William Sloan, II