Patents by Inventor Brian William Attwood

Brian William Attwood 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).

  • Production of fibrous sheet material
    Patent number: 4097640
    Abstract: Foldable boxboard made by dry-laying cellulosic fibers and 1-10% starch. The boxboard has a weight of at least 210 g.s.m., a stiffness in the machine direction of at least 5.8 Kenley units, and a ratio of stiffness in the machine direction and in the cross-machine direction of substantially 1:1.
    Type: Grant
    Filed: December 16, 1976
    Date of Patent: June 27, 1978
    Assignee: Karl Kroyer St. Anne's Limited
    Inventors: Harold George Curry, Brian William Attwood, Derek Graham Walter White, John Mosgaard Christensen, Karl Kristian Kobs Kroyer
  • Flowbox with convergent wall portions
    Patent number: 4083750
    Abstract: For a paper, board or similar fibrous web making machine, a flowbox comprising an enclosed explosion chamber having upstream and downstream walls converging from a top wall toward a bottom wall, the stock inlet being directed at the downstream wall adjacent the region of convergence. A stock outlet is provided by non-divergent upper and lower plates defining an exit slice, the lower plate being a continuation of the bottom wall and the lower plate being shorter than the upper plate.
    Type: Grant
    Filed: May 3, 1976
    Date of Patent: April 11, 1978
    Assignee: St. Anne's Board Mill Company Limited
    Inventors: Michael David Newns, Brian William Attwood
  • Apparatus for forming multi-ply fibrous sheets
    Patent number: 4074959
    Abstract: An apparatus for forming a multi-ply sheet of paper in which a first web of cellulosic fibers is dry formed and consolidated, a second web of cellulosic fibers is separately dry formed and consolidated, and the two thus consolidated webs are combined into a single multi-ply sheet of paper or paperboard.
    Type: Grant
    Filed: September 30, 1976
    Date of Patent: February 21, 1978
    Assignee: Karl Kroyer St. Anne's Limited
    Inventors: Harold George Curry, Brian William Attwood, Derek Graham Walter White
  • Method and apparatus for dry forming a layer of fibers
    Patent number: 4074393
    Abstract: In dry forming a layer of fibers, the fibers are conveyed by carrier air to a distributor housing having a perforated bottom wall through which the fibers pass downwards on to a foraminous forming surface connected on its underside to a suction box. The invention ensures that the fibers pass from the distributor to the forming surface under the influence of suction and gravity alone so as to provide a layer of more uniform depth than hitherto obtained by dry forming.
    Type: Grant
    Filed: December 12, 1975
    Date of Patent: February 21, 1978
    Assignee: Karl Kroyer St. Anne's Limited
    Inventors: Denis Raymond Hicklin, Brian William Attwood
  • Treatment of fibrous material
    Patent number: 4071651
    Abstract: A process for making a multi-ply consolidated dry-formed fibrous web having at least three plies, the outer plies are impregnated with a stiffening agent (e.g. starch) and the intermediate plies are impregnated with a sizing agent (e.g. wax/rosin size) to render them impervious to the stiffening agent. After the web has been consolidated by hot moist pressing, its outer surfaces may be further sized and hot moulded.
    Type: Grant
    Filed: January 4, 1977
    Date of Patent: January 31, 1978
    Assignee: Karl Kroyer St. Anne's Limited
    Inventors: Denis Raymond Hicklin, Derek Graham Walter White, Brian William Attwood
  • Multi-ply fibrous sheets having a wet-laid ply and a dry-laid ply
    Patent number: 4046622
    Abstract: A process and apparatus for forming a multi-ply sheet of cellulosic fibrous material. A dry-laid mat and a wet-laid web of cellulosic fibers are joined together and concurrently the dry-laid mat is consolidated by the concurrent application of heat, pressure and moisture, the moisture being derived from the wet-laid web.
    Type: Grant
    Filed: June 15, 1976
    Date of Patent: September 6, 1977
    Assignee: Karl Kroyer St. Anne's Limited
    Inventors: Brian William Attwood, Dennis Raymond Hicklin
  • Production of fibrous sheet material
    Patent number: 4011034
    Abstract: Apparatus for consolidating a dry-laid web of fibers comprising means for moistening the web, a heated surface, a backing which holds the moistened web against the heated surface, and at least two spaced apart pressure rolls which press against the backing to define with the heated surface pressure nips to increase the pressure on the web against the heated surface at the nips and wherein the backing holds the web against the heated surface between the nips.
    Type: Grant
    Filed: April 9, 1976
    Date of Patent: March 8, 1977
    Assignee: Karl Kroyer St. Anne's Limited
    Inventors: Harold George Curry, Brian William Attwood, Derek Graham Walter White, John Mosgaard Christensen, Karl Kristian Kobs Kroyer
  • Apparatus for making fibrous sheet material
    Patent number: 3976412
    Abstract: Apparatus for dry forming one or more fibrous layers on a forming surface to provide eventually fiberboard or paper in which the fibers are fed by carrier air to a distributor immediately above the forming surface. The rate of flow of the carrier air and its fiber concentration are adjusted to match the distributor requirements by removal of some of the carrier air in a cyclone separator upstream of the distributor. Any removed fibers are fed back into the remaining carrier air.
    Type: Grant
    Filed: June 6, 1975
    Date of Patent: August 24, 1976
    Assignee: Karl Kroyer St. Anne's Limited
    Inventors: Brian William Attwood, Denis Raymond Hicklin
  • Multi-ply paper and paperboard having a wet-laid ply and a dry-laid ply
    Patent number: 3954554
    Abstract: A method and apparatus for making a multi-ply paper sheet wherein a first web is formed by wet-laying fibres and a second web is formed by dry-laying fibres, the two webs being combined to form a multi-ply sheet and wherein the dry-laid web is produced by depositing dry fibres on a supporting band and consolidating the web by hot moist pressing before transferring to the first wet-laid web.
    Type: Grant
    Filed: August 21, 1973
    Date of Patent: May 4, 1976
    Assignee: Karl Kroyer St. Anne's Limited
    Inventors: Harold George Curry, Brian William Attwood, Derek Graham Walter White