Patents Assigned to Weyerhaeuser Company
  • Unbleached pulp for lyocell products
    Patent number: 6833187
    Abstract: In accordance with the present invention, lyocell products can be made with unbleached pulps resulting in products with high amounts of hemicellulose and high amounts of lignin as compared to conventional lyocell products. The lyocell products of the present invention are advantageously less expensive to produce but retain the desirable strength of conventional lyocell products.
    Type: Grant
    Filed: April 16, 2003
    Date of Patent: December 21, 2004
    Assignee: Weyerhaeuser Company
    Inventors: Mengkui Luo, Amar Neogi
  • Cutter trimmer sorter
    Patent number: 6826990
    Abstract: An apparatus for cutting and sorting boards conveys the boards along a conveyor path. The apparatus senses the length of boards and the grade of boards, and cuts selected boards into first and second segments. The first and second segments are aligned against lumber lines respectively on each side of a conveyor path. The boards are then selectively sorted and dropped into bins successively positioned along each side of the conveyor path.
    Type: Grant
    Filed: March 26, 2002
    Date of Patent: December 7, 2004
    Assignee: Weyerhaeuser Company
    Inventor: David Olsen
  • Method for increasing filler retention of cellulosic fiber sheets
    Patent number: 6824649
    Abstract: A method for increasing filler retention of cellulosic fiber sheets is disclosed. In the method, cellulosic fibers with increased anionic sites are treated with either positively charged filler particles and/or amphoteric filler particles or a cationic retention aid and negatively charged filler particles and/or amphoteric filler particles. Cellulosic fiber sheets with retained filler particles are also disclosed.
    Type: Grant
    Filed: September 4, 2003
    Date of Patent: November 30, 2004
    Assignee: Weyerhaeuser Company
    Inventors: Richard A. Jewell, Amar N. Neogi, Steven J. White
  • Embryogenic culture initiation of douglas-fir by maltose
    Publication number: 20040237130
    Abstract: In one aspect, the present invention provides methods for producing Douglas-fir somatic embryos. In one aspect, the methods of the invention comprise the step of culturing Douglas-fir explants in, or on, an initiation medium comprising a principal carbohydrate source selected from the group consisting of maltose, glucose, and a combination thereof, to form embryonal suspensor masses comprising early-stage somatic embryos. In another aspect, the methods of the invention additionally comprise the step of culturing Douglas-fir embryonal suspensor masses in maintenance medium comprising a principal carbohydrate source selected from the group consisting of maltose, glucose, and a combination thereof, to form an established embryonal suspensor mass comprising early-stage somatic embryos.
    Type: Application
    Filed: April 7, 2004
    Publication date: November 25, 2004
    Applicant: Weyerhaeuser Company
    Inventors: Pramod K. Gupta, Diane G. Holmstrom, Doris Budworth
  • Method for making tissue and towel products containing crosslinked cellulosic fibers
    Patent number: 6821388
    Abstract: Tissue and towel products that include crosslinked cellulosic fibers. Methods for making tissue and towel products that include crosslinked cellulosic fibers.
    Type: Grant
    Filed: April 25, 2003
    Date of Patent: November 23, 2004
    Assignee: Weyerhaeuser Company
    Inventor: David G. Marsh
  • Methods for classification of somatic embryos
    Publication number: 20040224301
    Abstract: The present invention is directed towards methods for the classification of plant embryos by the application of one or more classification algorithms to analyze digitized images and absorption, transmittance, or reflectance spectra. The methods are generally applicable and emphasize the importance of acquiring and using as much image and absorption, transmittance, or reflectance spectral information as possible, based on objective criteria. The present invention allows automated selection of embryos most suitable for further culture and rejection of those seen as less suitable.
    Type: Application
    Filed: October 7, 2003
    Publication date: November 11, 2004
    Applicant: Weyerhaeuser Company
    Inventors: Roger Timmis, Mitchell R. Toland, Timnit Ghermay, William C. Carlson, James A. Grob
  • Flowable and meterable densified fiber flake
    Patent number: 6811879
    Abstract: The present invention is directed to a new form of pulp that is a flake having a specific size, density, and wet dispersibility. The flakes are easy to meter in specified quantities when adding to cementitious products, because bulk quantities of the flakes flow well in conduits and other enclosed containers. The pulp flakes can supply sufficient cellulose fiber to an extrusion process due to the flakes' high fiber density. The pulp flakes have a wet dispersability that is comparable to some pulp sheets that have not been hammermilled. In one embodiment of the invention, a pulp flake is provided that has a wet dispersion of from about 60 to about 240 counts as measured by a standard British disintegrator. Another embodiment of a pulp flake has a density of from about 0.3 to about 0.7 g/cc. In one embodiment, the pulp flake has a size of from about 3 to about 5 mm3.
    Type: Grant
    Filed: August 30, 2002
    Date of Patent: November 2, 2004
    Assignee: Weyerhaeuser Company
    Inventors: Ramon C. Dezutter, Brian Wester, Robert A. Veleber, Michael R. Hansen
  • Method for making an insulating paperboard
    Publication number: 20040211535
    Abstract: An insulating paperboard contains at least one layer of cellulose fibers. The one layer is at least partially composed of bulky fibers. The paperboard is sufficiently insulated to provide a hot water &Dgr;T across the paperboard of at least 0.7° C.±2.3° C. per 0.1 mm of caliper. The paperboard may be embossed to decrease surface transmission of heat. A hot cup may be produced from the insulating paperboard.
    Type: Application
    Filed: May 14, 2004
    Publication date: October 28, 2004
    Applicant: Weyerhaeuser Company
    Inventor: Donald D. Halabisky
  • Hot cup made from an insulating paperboard
    Publication number: 20040213930
    Abstract: An insulating paperboard contains at least one layer of cellulose fibers. The one layer is at least partially composed of bulky fibers. The paperboard is sufficiently insulated to provide a hot water &Dgr;T across the paperboard of at least 0.7° C.±2.3° C. per 0.1 mm of caliper. The paperboard may be embossed to decrease surface transmission of heat. A hot cup may be produced from the insulating paperboard.
    Type: Application
    Filed: May 14, 2004
    Publication date: October 28, 2004
    Applicant: Weyerhaeuser Company
    Inventor: Donald D. Halabisky
  • Insulating paperboard
    Publication number: 20040213978
    Abstract: An insulating paperboard contains at least one layer of cellulose fibers. The one layer is at least partially composed of bulky fibers. The paperboard is sufficiently insulated to provide a hot water &Dgr;T across the paperboard of at least 0.7° C.±2.3° C. per 0.1 mm of caliper. The paperboard may be embossed to decrease surface transmission of heat. A hot cup may be produced from the insulating paperboard.
    Type: Application
    Filed: May 14, 2004
    Publication date: October 28, 2004
    Applicant: Weyerhaeuser Company
    Inventor: Donald D. Halabisky
  • Embossed insulating paperboard
    Publication number: 20040213961
    Abstract: An insulating paperboard contains at least one layer of cellulose fibers. The one layer is at least partially composed of bulky fibers. The paperboard is sufficiently insulated to provide a hot water &Dgr;T across the paperboard of at least 0.7° C.±2.3° C. per 0.1 mm of caliper. The paperboard may be embossed to decrease surface transmission of heat. A hot cup may be produced from the insulating paperboard.
    Type: Application
    Filed: May 14, 2004
    Publication date: October 28, 2004
    Applicant: Weyerhaeuser Company
    Inventors: Donald D. Halabisky, William C. Johnston
  • Hopper box
    Patent number: 6808092
    Abstract: The present invention includes a blank and a container constructed from containerboard material cut and scored to form an inner and an outer housing. The outer housing includes opposing side and end walls that are hingedly attached to a plurality of bottom panels that form a container bottom. The bottom panels include a hopper bore defined therethrough. An inner housing includes an interior upper region and an interior lower region. At least a portion of the interior upper region is substantially rigidly attached to an inner surface of the outer housing. The interior lower region is configured to form a plurality of inwardly angled interior panels that are angled substantially in the direction of the hopper bore. A removable closure panel is configured to close or otherwise substantially selectively seal the hopper bore.
    Type: Grant
    Filed: January 6, 2003
    Date of Patent: October 26, 2004
    Assignee: Weyerhaeuser Company
    Inventor: Ronald D. Timbrook
  • Labeling paint for use with metallic stencils on oriented strandboard finishing line
    Patent number: 6808750
    Abstract: The invention is a method for applying a stable, labeling paint suitable for use on an OSB finishing line in conjunction with metal stencils. The labeling paint is water-based and can include opacifying agents, viscosity enhancing agents, surfactants, a polymeric binding agent with a glass transition temperature that is greater than about 25° C., and a debonding agent, which is active on metal surfaces.
    Type: Grant
    Filed: April 2, 2003
    Date of Patent: October 26, 2004
    Assignee: Weyerhaeuser Company
    Inventor: Jack G. Winterowd
  • Method of making a modified unbleached pulp for lyocell products
    Publication number: 20040206463
    Abstract: In accordance with the present invention, lyocell products can be made with unbleached pulps resulting in products with high amounts of hemicellulose and high amounts of lignin as compared to conventional lyocell products. The lyocell products of the present invention are advantageously less expensive to produce but retain the desirable strength of conventional lyocell products.
    Type: Application
    Filed: April 16, 2003
    Publication date: October 21, 2004
    Applicant: Weyerhaeuser Company
    Inventors: Mengkui Luo, Amar Neogi
  • UNBLEACHED PULP FOR LYOCELL PRODUCTS
    Publication number: 20040209078
    Abstract: In accordance with the present invention, lyocell products can be made with unbleached pulps resulting in products with high amounts of hemicellulose and high amounts of lignin as compared to conventional lyocell products. The lyocell products of the present invention are advantageously less expensive to produce but retain the desirable strength of conventional lyocell products.
    Type: Application
    Filed: April 16, 2003
    Publication date: October 21, 2004
    Applicant: Weyerhaeuser Company
    Inventors: Mengkui Luo, Amar Neogi
  • Use of thinnings and other low specific gravity wood for lyocell pulps method
    Patent number: 6797113
    Abstract: The use of low specific gravity wood from thinning operations, for example, will produce a lower brownstock viscosity for a given kappa number target. A differential of 200-cP falling ball pulp viscosity has been detected from Kraft cooks of low and high specific gravity wood. Using low specific gravity wood can reduce the bleach stage temperature and the chemical dose needed in the bleach plant to produce lyocell pulp specifications. Low specific gravity wood also increases the ability to reduce pulp viscosity to very low levels without increasing the copper number of the pulp or the concentration of carbonyl in the pulp above acceptable levels.
    Type: Grant
    Filed: January 2, 2003
    Date of Patent: September 28, 2004
    Assignee: Weyerhaeuser Company
    Inventors: James E. Sealey, II, W. Harvey Persinger, Jr., Kent Robarge, Mengkui Luo
  • Lyocell fiber from unbleached pulp
    Patent number: 6790527
    Abstract: In accordance with the present invention, lyocell products can be made with unbleached pulps resulting in products with high amounts of hemicellulose and high amounts of lignin as compared to conventional lyocell products. The lyocell products of the present invention are advantageously less expensive to produce but retain the desirable strength of conventional lyocell products.
    Type: Grant
    Filed: April 16, 2003
    Date of Patent: September 14, 2004
    Assignee: Weyerhaeuser Company
    Inventors: Mengkui Luo, Amar Neogi
  • Multi-purpose packing, shipping and display container
    Patent number: 6789726
    Abstract: The present invention includes a unique multi-purpose blank and resulting container for packing, shipping and displaying a product at a point-of-purchase. The container includes two substantially similar display units hingedly connected to one another along a detachable hinge line. The container holds products in a horizontal or vertical orientation. Additionally, the first display unit may be separated from the second display unit along the hinge line. Consequently, the display units may also be placed side-by-side, stacked vertically, or displayed singularly. A removable H-divider separates the first display unit from the second display unit and provides additional structural support. Additionally, an optional closure panel may be included to cover the display units.
    Type: Grant
    Filed: August 30, 2002
    Date of Patent: September 14, 2004
    Assignee: Weyerhaeuser Company
    Inventors: Walter D. Keefe, Jr., Nicholas A. Philips
  • Unitary bulk container for use with internal bag
    Patent number: 6786394
    Abstract: A unitary bulk container is described having an inner sleeve (10) and an outer sleeve (12). The inner sleeve (10) has opposed side panels (22), (24) and two sets of opposed end panels. The outer sleeve (12) has opposed side panels (62), (66) and opposed end panels (60), (64). As assembled, the inner sleeve (10) is positioned within the outer sleeve (12) with either the inner sleeve side or end panels being adhered to the outer sleeve side or end panels. The other of the inner and outer sleeve side or end panels are not adhered to one another. The outer sleeve (12) of the assembled container preferably has a four-sided shaped, though at least two of its upright corners do not form true 90 degree angles. The container is capable of assuming a flat unitary collapsed state and an open unitary erected state. The container is initially formed to its flat unitary collapsed state.
    Type: Grant
    Filed: March 18, 2002
    Date of Patent: September 7, 2004
    Assignee: Weyerhaeuser Company
    Inventor: Robert C. Prince
  • System for making dried singulated crosslinked cellulose pulp fibers
    Patent number: 6782637
    Abstract: This invention provides a dried singulated crosslinked cellulose pulp fiber product as well as an apparatus and a method for forming singulated, crosslinked, and dried fibers. In accordance with the process, a feed pulp containing a crosslinker is delivered to a jet drier. The jet drier singulates and dries the feed pulp. The singulated and dried fibers are collected from the jet drier. The feed pulp may be further treated with a treatment substance. The jet drier may be maintained at negative pressure. The product fibers may have low knot count, a low fines count, as well improved kink, curl and twist. The apparatus for carrying out the process may include a pretreatment station for supplying the treatment substance, a pulp feed device designed for pulp, a pulp feed device designed for pulp and foam suspensions, and/or a fiber separation station having a vacuum conveyor.
    Type: Grant
    Filed: January 16, 2002
    Date of Patent: August 31, 2004
    Assignee: Weyerhaeuser Company
    Inventors: Michael J. Yancey, Brian Wester, Michael David Vrbanac, Ramon Charles Dezutter