Patents Assigned to PulPac AB
  • Patent number: 12312745
    Abstract: A method for producing a cellulose product from an air-formed cellulose blank structure comprising the steps of: providing a cellulose blank structure which is air-formed from cellulose fibres; applying, in a first application step (SA1), an alkyl ketene dimer (AKD) dispersion to the cellulose blank structure, and applying, in a second application step (SA2) a latex dispersion to the cellulose blank structure arranging the cellulose blank structure with the applied alkyl ketene dimer (AKD) dispersion and latex dispersion in a forming mould; heating the cellulose blank structure to a forming temperature (TF) in the range of 100° C. to 300° C., and forming the cellulose product from the cellulose blank structure in the forming mould, by pressing the heated cellulose blank structure with the applied alkyl ketene dimer (AKD) dispersion and latex dispersion with a forming pressure (PF) of at least 1 MPa, preferably 4-20 MPa.
    Type: Grant
    Filed: June 26, 2020
    Date of Patent: May 27, 2025
    Assignee: PULPAC AB
    Inventors: Edward Guidotti, Mostafa Jabbari
  • 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: 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: 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: 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