Patents by Inventor Peter A. Graef

Peter A. Graef 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).

  • Patent number: 6630054
    Abstract: Methods for forming an absorbent fibrous composite containing absorbent material dispersed in bands through the composite and along the composite's length are disclosed. The methods generally include depositing a fibrous slurry on a foraminous support to form a web and depositing or injecting absorbent material into the web across its width to provide a web having absorbent material in bands along the composite's length. Drying the web provides a fluted absorbent composite. In one embodiment, the method is a wetlaid method and in another embodiment, the method is a foam-forming method. Preferably, the methods are twin-wire forming methods.
    Type: Grant
    Filed: September 18, 2000
    Date of Patent: October 7, 2003
    Assignee: Weyerhaeuser Company
    Inventors: Peter A. Graef, Clifford R. Bolstad, Fred B. Howard, Charles E. Miller, Daniel T. Bunker
  • Publication number: 20030171727
    Abstract: An unitary stratified composite composed of a first stratum and a second stratum integrally connected by a transition zone is disclosed. The first stratum serves as a liquid acquisition stratum that rapidly acquires and then transfers liquid to the second stratum. The second stratum serves to withdraw liquid from the first stratum and further serves as a temporary storage stratum. Methods for forming the unitary stratified composite are also disclosed.
    Type: Application
    Filed: February 24, 2003
    Publication date: September 11, 2003
    Applicant: Weyerhaeuser Company
    Inventors: Peter A. Graef, Colin Elston, Daniel T. Bunker, Fred B. Howard, Jeffrey D. Mathews, Shahrokh A. Naieni, Charles E. Miller
  • Publication number: 20030167045
    Abstract: An unitary stratified composite composed of a first stratum and a second stratum integrally connected by a transition zone is disclosed. The first stratum serves as a liquid acquisition stratum that rapidly acquires and then transfers liquid to the second stratum. The second stratum serves to withdraw liquid from the first stratum and further serves as a temporary storage stratum. Methods for forming the unitary stratified composite are also disclosed.
    Type: Application
    Filed: February 24, 2003
    Publication date: September 4, 2003
    Applicant: Weyerhaeuser Company
    Inventors: Peter A. Graef, Colin Elston, Daniel T. Bunker, Fred B. Howard, Jeffrey D. Mathews, Shahrokh A. Naieni, Charles E. Miller
  • Publication number: 20030144642
    Abstract: An absorbent composite having fibrous bands is described. The composite includes one or more fibrous bands in a fibrous base. The base includes a fibrous matrix and absorbent material. The fibrous bands are substantially free of absorbent material. Absorbent articles that include the composite and methods for forming the composite are also disclosed.
    Type: Application
    Filed: December 19, 2002
    Publication date: July 31, 2003
    Applicant: Weyerhaeuser Company
    Inventors: Melissa I. Dopps, Richard A. Edmark, David G. Marsh, Peter A. Graef
  • Publication number: 20030139718
    Abstract: An absorbent composite having a reticulated core and a fibrous stratum is disclosed. The core and stratum are integrally formed, and the stratum is coextensive with a surface of the core. In one embodiment, the composite includes strata on opposing surfaces of the core. The core includes a fibrous matrix and absorbent material. The fibrous matrix defines voids and passages between the voids, which are distributed throughout the composite. Absorbent material is located within some of the voids. On wetting, absorbent material located in these voids is expandable into the void. Methods for forming the composite and absorbent articles that include the composite are also disclosed.
    Type: Application
    Filed: November 13, 2002
    Publication date: July 24, 2003
    Applicant: Weyerhaeuser Company
    Inventors: Peter A. Graef, Fred B. Howard, Charles E. Miller, Clifford R. Bolstad, Colin Elston, David G. Marsh, Richard A. Edmark, Terry M. Grant, Daniel T. Bunker, Yong Li, Kay Rokman, Juhani Jansson, Eino Laine
  • Publication number: 20030130633
    Abstract: A unitary stratified composite composed of a first stratum and a second stratum integrally connected by a transition zone is disclosed. The first stratum serves as a liquid acquisition stratum that rapidly acquires and then transfers liquid to the second stratum. The second stratum serves to withdraw liquid from the first stratum and further serves as a temporary storage stratum. Methods for forming the unitary stratified composite are also disclosed.
    Type: Application
    Filed: November 13, 2002
    Publication date: July 10, 2003
    Applicant: Weyerhaeuser Company
    Inventors: Peter A. Graef, Colin Elston, Daniel T. Bunker, Fred B. Howard, Jeffrey D. Mathews, Shahrokh A. Naieni, Charles E. Miller
  • Publication number: 20030120236
    Abstract: An absorbent composite (10) having a fibrous matrix that includes absorbent material is disclosed. The fibrous matrix defines voids (14) and passages between the voids, which are distributed throughout the composite. Absorbent material (18) is located within some of the voids (14). Absorbent material located in these voids is expandable into the void. In a preferred embodiment, the composite's fibrous matrix includes resilient and matrix fibers (16). The composite optionally includes a wet strength agent.
    Type: Application
    Filed: November 13, 2002
    Publication date: June 26, 2003
    Applicant: Weyerhaeuser Company
    Inventors: Peter A. Graef, Fred B. Howard
  • Publication number: 20030045850
    Abstract: A fibrous layer that includes a refined blend of crosslinked cellulosic fibers and noncrosslinked cellulosic fibers. In one embodiment, the layer includes about 85 percent by weight crosslinked fibers and about 15 percent by weight noncrosslinked fibers. An absorbent construct that includes the fibrous layer and a liquid storage layer. Personal care absorbent products that include the distribution layer.
    Type: Application
    Filed: August 27, 2002
    Publication date: March 6, 2003
    Applicant: Weyerhaeuser Company
    Inventors: Peter A. Graef, Terry M. Grant, David G. Marsh, Daniel T. Bunker, Melissa D. Johnson
  • Patent number: 6525240
    Abstract: An unitary stratified composite composed of a first stratum and a second stratum integrally connected by a transition zone is disclosed. The first stratum serves as a liquid acquisition stratum that rapidly acquires and then transfers liquid to the second stratum. The second stratum serves to withdraw liquid from the first stratum and further serves as a temporary storage stratum. Methods for forming the unitary stratified composite are also disclosed.
    Type: Grant
    Filed: July 21, 2000
    Date of Patent: February 25, 2003
    Assignee: Weyerhaeuser Company
    Inventors: Peter A. Graef, Colin Elston, Daniel T. Bunker, Fred B. Howard, Jeffrey D. Mathews, Shahrokh A. Naieni, Charles E. Miller
  • Patent number: 6521812
    Abstract: A unitary stratified composite composed of a first stratum and a second stratum integrally connected by a transition zone is disclosed. The first stratum serves as a liquid acquisition stratum that rapidly acquires and then transfers liquid to the second stratum. The second stratum serves to withdraw liquid from the first stratum and further serves as a temporary storage stratum. Methods for forming the unitary stratified composite are also disclosed.
    Type: Grant
    Filed: July 21, 2000
    Date of Patent: February 18, 2003
    Assignee: Weyerhaeuser Company
    Inventors: Peter A. Graef, Colin Elston, Daniel T. Bunker, Fred B. Howard, Jeffrey D. Mathews, Shahrokh A. Naieni, Charles E. Miller
  • Patent number: 6518479
    Abstract: A unitary stratified composite composed of a first stratum and a second stratum integrally connected by a transition zone is disclosed. The first stratum serves as a liquid acquisition stratum that rapidly acquires and then transfers liquid to the second stratum. The second stratum serves to withdraw liquid from the first stratum and further serves as a temporary storage stratum. Methods for forming the unitary stratified composite are also disclosed.
    Type: Grant
    Filed: July 21, 2000
    Date of Patent: February 11, 2003
    Assignee: Weyerhaeuser Company
    Inventors: Peter A. Graef, Colin Elston, Daniel T. Bunker, Fred B. Howard, Jeffrey D. Matthews, Shahrokh A. Naieni, Charles E. Miller
  • Publication number: 20030018311
    Abstract: A unitary absorbent layer composed of a crosslinked cellulosic fibers and a binder is disclosed. In a preferred embodiment, the binder is a bicomponent binding fiber. In combination with one or more other layers in an absorbent article, the unitary absorbent layer can rapidly acquire, distribute, temporarily store, and then release the acquired liquid to other liquid retention layers. Methods for forming the unitary absorbent layer are also disclosed.
    Type: Application
    Filed: June 26, 2002
    Publication date: January 23, 2003
    Applicant: Weyerhaeuser Company
    Inventors: Peter A. Graef, Colin Elston, Daniel T. Bunker, Fred B. Howard, Jeffrey D. Mathews, Shahrokh A. Naieni
  • Publication number: 20030009141
    Abstract: An absorbent composite (10) having a fibrous matrix that includes absorbent material is disclosed. The fibrous matrix defines voids (14) and passages between the voids, which are distributed throughout the composite. Absorbent material (18) is located within some of the voids (14). Absorbent material located in these voids is expandable into the void. In a preferred embodiment, the composite's fibrous matrix includes resilient and matrix fibers (16). The composite optionally includes a wet strength agent.
    Type: Application
    Filed: August 27, 1998
    Publication date: January 9, 2003
    Inventors: PETER A. GRAEF, FRED B. HOWARD
  • Publication number: 20020143307
    Abstract: A fibrous layer that includes a refined blend of crosslinked cellulosic fibers and noncrosslinked cellulosic fibers. In one embodiment, the layer includes about 85 percent by weight crosslinked fibers and about 15 percent by weight noncrosslinked fibers. An absorbent construct that includes the fibrous layer and a liquid storage layer. Personal care absorbent products that include the distribution layer.
    Type: Application
    Filed: December 7, 2001
    Publication date: October 3, 2002
    Inventors: Peter A. Graef, Terry M. Grant, David G. Marsh
  • Publication number: 20020137422
    Abstract: A fibrous layer that includes a refined blend of crosslinked cellulosic fibers and noncrosslinked cellulosic fibers. In one embodiment, the layer includes about 85 percent by weight crosslinked fibers and about 15 percent by weight noncrosslinked fibers. An absorbent construct that includes the fibrous layer and a liquid storage layer. Personal care absorbent products that include the distribution layer.
    Type: Application
    Filed: December 7, 2001
    Publication date: September 26, 2002
    Inventors: Peter A. Graef, Terry M. Grant, David G. Marsh, Daniel T. Bunker, Melissa D. Johnson
  • Publication number: 20020123728
    Abstract: A fibrous layer that includes a refined blend of crosslinked cellulosic fibers and noncrosslinked cellulosic fibers. In one embodiment, the layer includes about 85 percent by weight crosslinked fibers and about 15 percent by weight noncrosslinked fibers. An absorbent construct that includes the fibrous layer and a liquid storage layer. Personal care absorbent products that include the distribution layer.
    Type: Application
    Filed: December 7, 2001
    Publication date: September 5, 2002
    Inventors: Peter A. Graef, Terry M. Grant, David G. Marsh, Daniel T. Bunker, Melissa D. Johnson
  • Publication number: 20020112296
    Abstract: The present invention provides a bonded cellulosic fibrous product that includes crosslinked cellulosic fibers. Methods for forming the bonded cellulosic fibrous product and personal care absorbent products that include the bonded product are also provided.
    Type: Application
    Filed: November 14, 2001
    Publication date: August 22, 2002
    Inventors: Peter A. Graef, Terry M. Grant
  • Patent number: 6436231
    Abstract: An apparatus is disclosed for preparing a quantity of individual treated fibers from one or more fiber mats. The apparatus comprises a fiber treatment zone, and a conveyor for conveying each mat through the fiber treatment zone. In the treatment zone each mat is impregnated by an applicator with a treatment material, such as a crosslinking substance, and conveyed directly to an attrition device. The attrition device fiberizes the mats to form a fiber output having a low nit level, such as no more than about three, and a dryer both dries the fiber output and cures the crosslinking substance. The fiberizer is configured to minimize the accumulation of fiber at locations therein. Fiber is transported from the attrition device to the dryer at a high velocity under reduced pressure to promote drying. A heated retention bin is provided after drying to increase curing time in the system. A thermobonding agent may be added to the dried and cured fibers to enhance the wet strength of webs made from the fiber.
    Type: Grant
    Filed: July 31, 1995
    Date of Patent: August 20, 2002
    Assignee: Weyerhaeuser
    Inventors: Peter A. Graef, Colin Elston, Fred E. Olmstead, Clifford R. Bolstad, Mark W. Bowns, Frank R. Hunter, Allan R. Carney
  • Publication number: 20020088581
    Abstract: The present invention provides an extruded cellulosic fibrous product. In one embodiment, the product includes in situ crosslinked cellulosic fibers. In another embodiment, the product further includes a bonding agent. The product can optionally include other fibers and absorbent material. Methods for making the cellulosic fibrous product and absorbent articles that include the cellulosic fibrous product are also described.
    Type: Application
    Filed: November 14, 2001
    Publication date: July 11, 2002
    Inventors: Peter A. Graef, Terry M. Grant
  • Publication number: 20020026166
    Abstract: A unitary absorbent layer composed of a crosslinked cellulosic fibers and a binder is disclosed. In a preferred embodiment, the binder is a bicomponent binding fiber. In combination with one or more other layers in an absorbent article, the unitary absorbent layer can rapidly acquire, distribute, temporarily store, and then release the acquired liquid to other liquid retention layers. Methods for forming the unitary absorbent layer are also disclosed.
    Type: Application
    Filed: August 20, 1998
    Publication date: February 28, 2002
    Applicant: Weyerhaeuser Company
    Inventors: PETER A. GRAEF, COLIN ELSTON, DANIEL T. BUNKER, FRED B. HOWARD, JEFFREY D. MATTHEWS, SHAHROKH A. NAIENI