Patents Assigned to Karl Kroyer St. Anne's Limited
  • Patent number: 4160004
    Abstract: A method for producing a self-sustaining sheet of essentially cellulosic fibrous material with improved strength wherein a dry-laid web is moistened and then consolidated by passage along a heated consolidating surface wherein the web is held against this surface by one side of a supporting band, against the other side of which at least two spaced apart pressure rolls exert a pressure acting through the supporting band against the web, which pressure is preferably between 150 and 500 pounds per linear inch. The supporting band thereby maintains the web against the heated consolidating roll between said pair of pressure nips.
    Type: Grant
    Filed: July 26, 1976
    Date of Patent: July 3, 1979
    Assignee: Karl Kroyer St. Anne's Limited
    Inventors: Harold G. Curry, Brian W. Attwood, Derek G. W. White, John M. Christensen, Karl K. K. Kroyer
  • Patent number: 4144619
    Abstract: Apparatus for dry-laying cellulosic fibres on a foraminous travelling band comprises a distribution chamber one wall of which facing the band is provided by a vibratable screen. Within the chamber is a rotating brush roll positioned so that the brushes cause the screen to vibrate. Fibres are urged through the screen partly by the action of the brush roll. Provision may be made for recirculating air which has passed through the band back to the chamber.
    Type: Grant
    Filed: March 15, 1977
    Date of Patent: March 20, 1979
    Assignee: Karl Kroyer St. Anne's Limited
    Inventors: Derek G. W. White, Nicholas H. Holloway, Brian W. Attwood
  • 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
  • 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
  • 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
  • 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
  • Patent number: 4060360
    Abstract: A distributor box for dry forming a layer of fiber on a forming surface spaced below it, wherein obturators, e.g. dependent flaps, are located around an air gap between the bottom of the box and the forming surface in pre-selected position to modify the lateral air flow induced into the air gap and so assist the formation of a layer with a uniform depth.
    Type: Grant
    Filed: April 20, 1976
    Date of Patent: November 29, 1977
    Assignee: Karl Kroyer St. Anne's Limited
    Inventor: Frederick Tapp
  • 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
  • Patent number: 4033709
    Abstract: This invention concerns apparatus for moulding ribs, ridges, studs or other upstanding projections on a mouldable material and although not so restricted it will hereafter be described with reference to its use on apparatus for moulding dry formed fibrous material.
    Type: Grant
    Filed: July 7, 1975
    Date of Patent: July 5, 1977
    Assignee: Karl Kroyer St. Anne's Limited
    Inventor: Karl Kristian Kobs Kroyer
  • 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
  • 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
  • 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