Patents Assigned to PulPac AB
  • Patent number: 12208591
    Abstract: A method and system for edge-forming cellulose products from an air-formed cellulose blank structure. The system comprises a first mould part having an edge-forming device with a protruding element configured for compacting and separating fibres of the cellulose blank structure and a second mould part arranged for cooperating with each other. The edge-forming device is movably arranged in relation to a base structure of the first mould part, and is adapted for interacting with a pressure member arranged in the base structure. The method includes the steps: providing the air-formed cellulose blank structure, and forming a compacted edge structure of the cellulose products by separating fibres of the cellulose blank structure with the protruding element, applying an edge-forming temperature, and compacting the cellulose blank structure by applying an edge-forming pressure onto the cellulose blank structure between the protruding element and the second mould part.
    Type: Grant
    Filed: October 12, 2021
    Date of Patent: January 28, 2025
    Assignee: PULPAC AB
    Inventors: Martin Ljungberg, Mathias Bergfjord
  • Patent number: 12138830
    Abstract: A method for producing a cellulose product from a multi-layer cellulose blank structure, wherein the method comprises the steps; forming the multi-layer cellulose blank structure from at least a first layer of dry-formed cellulose fibres and a second layer of a cellulose fibre web structure, through arranging the at least first layer and second layer in a superimposed relationship to each other and in the superimposed relationship arranging the at least first layer and second layer in contact with each other; arranging the multi-layer cellulose blank structure in a forming mould; heating the multi-layer cellulose blank structure to a forming temperature in the range of 100° C. to 300° C.
    Type: Grant
    Filed: June 15, 2023
    Date of Patent: November 12, 2024
    Assignee: PulPac AB
    Inventors: Linus Larsson, Ove Larsson
  • Patent number: 12134215
    Abstract: A method for manufacturing a cellulose product, comprising the steps: dry forming a cellulose blank in a dry forming unit; arranging the cellulose blank in a forming mould; heating the cellulose blank to a forming temperature in the range of 100° C. to 200° C.; and pressing the cellulose blank in the forming mould with a forming pressure of at least 1 MPa.
    Type: Grant
    Filed: August 7, 2023
    Date of Patent: November 5, 2024
    Assignee: PulPac AB
    Inventors: Ove Larsson, Linus Larsson
  • Patent number: 12134214
    Abstract: The present invention relates to a method of manufacturing a cellulose product having a flat or non-flat product shape by a pressure moulding apparatus comprising a forming mould. The forming mould has a forming surface defining said product shape, The method comprises the steps of: arranging a cellulose blank containing less than 45 weight percent water in said forming mould; heating said cellulose blank to a forming temperature in the range of 100° C. to 200° C.; and pressing said cellulose blank by means of said forming mould with a forming pressure acting on the cellulose blank across said forming surface, said forming pressure being in the range of 1 MPa to 100 MPa.
    Type: Grant
    Filed: April 8, 2022
    Date of Patent: November 5, 2024
    Assignee: PulPac AB
    Inventors: Ove Larsson, Linus Larsson
  • Patent number: 11839999
    Abstract: A method for manufacturing a cellulose product, comprising the steps: dry forming a cellulose blank in a dry forming unit; arranging the cellulose blank in a forming mould; heating the cellulose blank to a forming temperature in the range of 100° C. to 200° C.; and pressing the cellulose blank in the forming mould with a forming pressure of at least 1 MPa.
    Type: Grant
    Filed: April 28, 2021
    Date of Patent: December 12, 2023
    Assignee: PulPac AB
    Inventors: Ove Larsson, Linus Larsson
  • Patent number: 11766810
    Abstract: A method for manufacturing a cellulose product, comprising the steps: dry forming a cellulose blank in a dry forming unit; arranging the cellulose blank in a forming mould; heating the cellulose blank to a forming temperature in the range of 100° C. to 200° C.; and pressing the cellulose blank in the forming mould with a forming pressure of at least 1 MPa.
    Type: Grant
    Filed: April 8, 2022
    Date of Patent: September 26, 2023
    Assignee: PULPAC AB
    Inventors: Ove Larsson, Linus Larsson
  • Patent number: 11717993
    Abstract: A method for producing a cellulose product from a multi-layer cellulose blank structure, wherein the method comprises the steps; forming the multi-layer cellulose blank structure from at least a first layer of dry-formed cellulose fibres and a second layer of a cellulose fibre web structure, through arranging the at least first layer and second layer in a superimposed relationship to each other and in the superimposed relationship arranging the at least first layer and second layer in contact with each other; arranging the multi-layer cellulose blank structure in a forming mould; heating the multi-layer cellulose blank structure to a forming temperature in the range of 100° C. to 300° C.
    Type: Grant
    Filed: April 17, 2019
    Date of Patent: August 8, 2023
    Assignee: PulPac AB
    Inventors: Linus Larsson, Ove Larsson
  • Patent number: 11407149
    Abstract: The present invention relates to a method of manufacturing a cellulose product having a flat or non-flat product shape by a pressure moulding apparatus comprising a forming mould. The forming mould has a forming surface defining said product shape, The method comprises the steps of: arranging a cellulose blank containing less than 45 weight percent water in said forming mould; heating said cellulose blank to a forming temperature in the range of 100° C. to 200° C.; and pressing said cellulose blank by means of said forming mould with a forming pressure acting on the cellulose blank across said forming surface, said forming pressure being in the range of 1 MPa to 100 MPa.
    Type: Grant
    Filed: March 16, 2017
    Date of Patent: August 9, 2022
    Assignee: PulPac AB
    Inventors: Ove Larsson, Linus Larsson
  • Patent number: 11020883
    Abstract: A method for manufacturing a cellulose product, comprising the steps: dry forming a cellulose blank in a dry forming unit; arranging the cellulose blank in a forming mould; heating the cellulose blank to a forming temperature in the range of 100° C. to 200° C.; and pressing the cellulose blank in the forming mould with a forming pressure of at least 1 MPa.
    Type: Grant
    Filed: March 16, 2017
    Date of Patent: June 1, 2021
    Assignee: PulPac AB
    Inventors: Ove Larsson, Linus Larsson
  • Publication number: 20190118426
    Abstract: The present invention relates to a method of manufacturing a cellulose product having a flat or non-flat product shape by a pressure moulding apparatus comprising a forming mould. The forming mould has a forming surface defining said product shape, The method comprises the steps of: arranging a cellulose blank containing less than 45 weight percent water in said forming mould; heating said cellulose blank to a forming temperature in the range of 100° C. to 200° C.; and pressing said cellulose blank by means of said forming mould with a forming pressure acting on the cellulose blank across said forming surface, said forming pressure being in the range of 1 MPa to 100 MPa.
    Type: Application
    Filed: March 16, 2017
    Publication date: April 25, 2019
    Applicant: PulPac AB
    Inventors: Ove LARSSON, Linus LARSSON
  • Patent number: D1019291
    Type: Grant
    Filed: April 14, 2022
    Date of Patent: March 26, 2024
    Assignee: PULPAC AB
    Inventor: Felix Sjöstrand Jonsson