Patents by Inventor Mari Hiltunen

Mari Hiltunen 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: 12146007
    Abstract: The present invention relates to a web of fibrous cellulosic material derived from wood pulp, said web being suitable for three-dimensional moulding to form a packaging product, wherein the web comprises >40 wt % of soft wood chemical pulp and at least one strength enhancement agent, wherein the web has a grammage less than 400 g/m2, and wherein the cellulose fibers of said soft wood chemical pulp comprise a fiber curl of >9%.
    Type: Grant
    Filed: December 4, 2019
    Date of Patent: November 19, 2024
    Assignee: Stora Enso OYJ
    Inventors: Isto Heiskanen, Mari Hiltunen, Nina Ruohoniemi, Titta Lammi, Ville Ribu, Tim Lindfors, Jari Räsänen
  • Publication number: 20230339646
    Abstract: The present invention relates to a container for liquid containing food products, manufactured by press forming of a polymer coated fiber based substrate, said container comprising a bottom portion, a sidewall portion and a top flange portion, wherein said press forming has resulted in the formation a plurality of creases extending in a direction from the bottom portion to the top flange portion and further across the top flange portion. The container comprises an indentation pattern (130, 140, 150, 160, 170, 180, 190a, 190b, 200) formed at a creased inner surface of said sidewall portion and/or at a creased top surface of said top flange portion, said indentation pattern preventing migration of liquid from a liquid containing food product in the container along said creases. The invention relates also to a method for manufacturing such container.
    Type: Application
    Filed: May 4, 2021
    Publication date: October 26, 2023
    Applicant: Stora Enso OYJ
    Inventors: Ville Ribu, Nina Miikki, Mari Hiltunen, Juha Varis, Panu Tanninen, Mika Kainusalmi
  • Patent number: 11548257
    Abstract: The invention relates to a method and an apparatus for deep-drawing a tray (1) from fiber-based sheet material (2), such as polymer coated board. The apparatus comprises a female moulding tool (3), which comprises a cavity (7) for forming the tray bottom outwardly, a male moulding tool (4), which comprises a plunger plate (11) for forming the tray bottom inwardly, the plunger plate being movable with respect to the cavity for forming the tray, and clamps (6, 15) with an interface for holding the sheet material and forming a tray rim flange. According to the invention by laterally distancing at least one of the moulding tools (3, 4) from the sheet material leeway is provided for free forming of the tray side walls while wrinkling or tearing of the same is avoided. Spacer plates (13) may be positioned behind the plunger plate (11), to adjust its position in relation to the cavity (7) of the female moulding tool (3).
    Type: Grant
    Filed: October 17, 2014
    Date of Patent: January 10, 2023
    Assignee: Stora Enso OYJ
    Inventors: Jari Räsänen, Henry Lindell, Kimmo Nevalainen, Panu Tanninen, Sami Matthews, Mari Hiltunen, Outi Kylliainen
  • Publication number: 20220298264
    Abstract: The present invention relates to a web of fibrous cellulosic material derived from wood pulp, said web being suitable for three-dimensional moulding to form a packaging product, wherein the web comprises >40 wt % of soft wood chemical pulp and at least one strength enhancement agent, wherein the web has a grammage less than 400 g/m2, and wherein the cellulose fibers of said soft wood chemical pulp comprise a fiber curl of >9%.
    Type: Application
    Filed: December 4, 2019
    Publication date: September 22, 2022
    Applicant: Stora Enso OYJ
    Inventors: Isto Heiskanen, Mari Hiltunen, Nina Ruohoniemi, Titta Lammi, Ville Ribu, Tim Lindfors, Jari Räsänen
  • Patent number: 11383473
    Abstract: A deep-drawn paper tray made of paper material, a method and an apparatus for manufacturing the tray, and a closed product package comprising the tray. The tray having a bottom and upwardly expanding side walls around the bottom, the side walls of the tray being shaped to expand through a plurality of circumferential steps dimensioned low enough for obtaining wrinkle-free side walls for the tray. The outermost step is a flat, wrinkle-free rim flange, which enables liquid and gas proof heat-sealing of a lid to form the package. The apparatus may comprise upper and lower moulding tools with concentric movable frames for forming the tray bottom and side wall steps from paper blanks, and moulding tools may be mounted onto a rotating turret carrying a paper blank through working stations arranged along the turret circumference, to shape the tray bottom and the side wall steps at the consecutive stations.
    Type: Grant
    Filed: October 2, 2018
    Date of Patent: July 12, 2022
    Assignee: STORA ENSO OYJ
    Inventors: Jari Räsänen, Niilo Pöyhönen, Mari Hiltunen, Outi Kylliäinen
  • Patent number: 11241855
    Abstract: The invention relates to a method and an apparatus for deep-drawing a tray (1) from a blank of sheet material (2). The blank is provided with score lines, which determine the location of wrinkles formed in the process. The apparatus comprises a female moulding tool (3), which comprises a cavity (7) for forming the tray bottom outwardly, a male moulding tool (4), which comprises a plunger (11) for forming the tray bottom inwardly, the plunger being movable with respect to the cavity for forming the tray, and clamps (6, 15) with an interface for holding the sheet material and forming a tray rim flange. According to the invention by laterally distancing at least one of the moulding tools (3, 4) from the sheet material leeway is pro-vided for free forming so that wrinkling of the tray side walls is achieved in a controlled manner. Spacer plates (13) may be positioned behind the plunger (11), to adjust its position in relation to the cavity (7) of the female moulding tool (3).
    Type: Grant
    Filed: October 8, 2015
    Date of Patent: February 8, 2022
    Assignee: Stora Enso OYJ
    Inventors: Jari Räsänen, Kimmo Nevalainen, Henry Lindell, Panu Tanninen, Sami Matthews, Mari Hiltunen, Outi Kylliainen
  • Patent number: 10975522
    Abstract: The invention concerns a method of manufacturing paper or board, the paper or board obtained by the method, and a method of producing a tray from the board. In a fibrous stock for papermaking is incorporated an amount of polymer coated fibrous particles, which even have a foaming agent such as moisture contained therein. A web is formed from the fibrous stock on a forming fabric of a paper or board machine, followed by pressing and drying to a finished paper or board. As the paper or board is sufficiently heated the foaming agent within the particles evaporates, causing expansion and foaming of the polymer coating, which adds to malleability of the board as it is moulded into a shaped article such as a board tray. The invention even covers production of doubly coated fibrous particles for use in said methods, the inner coating layer being of a foamable polymer with a higher melt flow rate and the outer coating layer being of a non-foaming polymer of a lower melt flow rate.
    Type: Grant
    Filed: February 6, 2017
    Date of Patent: April 13, 2021
    Assignee: Stora Enso OYJ
    Inventors: Jari Räsänen, Mari Hiltunen, Ali Harlin, Hanna Koskela, Christiane Laine, Laura Kela
  • Publication number: 20200308768
    Abstract: The invention concerns a method of manufacturing paper or board, the paper or board obtained by the method, and a method of producing a tray from the board. In a fibrous stock for papermaking is incorporated an amount of polymer coated fibrous particles, which even have a foaming agent such as moisture contained therein. A web is formed from the fibrous stock on a forming fabric of a paper or board machine, followed by pressing and drying to a finished paper or board. As the paper or board is sufficiently heated the foaming agent within the particles evaporates, causing expansion and foaming of the polymer coating, which adds to malleability of the board as it is moulded into a shaped article such as a board tray. The invention even covers production of doubly coated fibrous particles for use in said methods, the inner coating layer being of a foamable polymer with a higher melt flow rate and the outer coating layer being of a non-foaming polymer of a lower melt flow rate.
    Type: Application
    Filed: February 6, 2017
    Publication date: October 1, 2020
    Applicant: Stora Enso OYJ
    Inventors: Jari Räsänen, Mari Hiltunen, Ali Harlin, Hanna Koskela, Christiane Laine, Laura Kela
  • Publication number: 20200079004
    Abstract: The present invention is in the technical field of packages, specifically surfaces of materials used for packages, and the manufacture thereof. According to the present invention, a micropattern is created on at least surface of a substrate, to obtain a material suitable for manufacturing packages.
    Type: Application
    Filed: December 14, 2017
    Publication date: March 12, 2020
    Applicant: Stora Enso OYJ
    Inventors: Jari Räsänen, Ville Ribu, Kimmo Nevalainen, Nina Miikki, Mari Hiltunen, Outi Kylliäinen, Mika Kainusalmi, Panu Tanninen
  • Publication number: 20190054714
    Abstract: A deep-drawn paper tray made of paper material, a method and an apparatus for manufacturing the tray, and a closed product package comprising the tray. The tray having a bottom and upwardly expanding side walls around the bottom, the side walls of the tray being shaped to expand through a plurality of circumferential steps dimensioned low enough for obtaining wrinkle-free side walls for the tray. The outermost step is a flat, wrinkle-free rim flange, which enables liquid and gas proof heat-sealing of a lid to form the package. The apparatus may comprise upper and lower moulding tools with concentric movable frames for forming the tray bottom and side wall steps from paper blanks, and moulding tools may be mounted onto a rotating turret carrying a paper blank through working stations arranged along the turret circumference, to shape the tray bottom and the side wall steps at the consecutive stations.
    Type: Application
    Filed: October 2, 2018
    Publication date: February 21, 2019
    Inventors: Jari RÄSÄNEN, Niilo PÖYHÖNEN, Mari HILTUNEN, Outi KYLLIÄINEN
  • Patent number: 10118360
    Abstract: A deep-drawn paper tray made of paper material, a method and an apparatus for manufacturing the tray, and a closed product package comprising the tray. The tray having a bottom and upwardly expanding side walls around the bottom, the side walls of the tray being shaped to expand through a plurality of circumferential steps dimensioned low enough for obtaining wrinkle-free side walls for the tray. The outermost step is a flat, wrinkle-free rim flange, which enables liquid and gas proof heat-sealing of a lid to form the package. The apparatus may comprise upper and lower moulding tools with concentric movable frames for forming the tray bottom and side wall steps from paper blanks, and moulding tools may be mounted onto a rotating turret carrying a paper blank through working stations arranged along the turret circumference, to shape the tray bottom and the side wall steps at the consecutive stations.
    Type: Grant
    Filed: March 15, 2013
    Date of Patent: November 6, 2018
    Assignee: STORA ENSO OYJ
    Inventors: Jari Räsänen, Niilo Pöyhönen, Mari Hiltunen, Outi Kylliäinen
  • Publication number: 20170305097
    Abstract: The invention relates to a method and an apparatus for deep-drawing a tray (1) from a blank of sheet material (2). The blank is provided with score lines, which determine the location of wrinkles formed in the process. The apparatus comprises a female moulding tool (3), which comprises a cavity (7) for forming the tray bot-tom outwardly, a male moulding tool (4), which comprises a plunger (11) for form-ing the tray bottom inwardly, the plunger being movable with respect to the cavity for forming the tray, and clamps (6, 15) with an interface for holding the sheet ma-terial and forming a tray rim flange. According to the invention by laterally distanc-ing at least one of the moulding tools (3, 4) from the sheet material leeway is pro-vided for free forming so that wrinkling of the tray side walls is achieved in a con-trolled manner. Spacer plates (13) may be positioned behind the plunger (11), to adjust its position in relation to the cavity (7) of the female moulding tool (3).
    Type: Application
    Filed: October 8, 2015
    Publication date: October 26, 2017
    Inventors: Jari Räsänen, Kimmo Nevalainen, Henry Lindell, Panu Tanninen, Sami Matthews, Mari Hiltunen, Outi Kylliainen
  • Publication number: 20160288445
    Abstract: The invention relates to a method and an apparatus for deep-drawing a tray (1) from fiber-based sheet material (2), such as polymer coated board. The apparatus comprises a female moulding tool (3), which comprises a cavity (7) for forming the tray bottom outwardly, a male moulding tool (4), which comprises a plunger plate (11) for forming the tray bottom inwardly, the plunger plate being movable with respect to the cavity for forming the tray, and clamps (6, 15) with an interface for holding the sheet material and forming a tray rim flange. According to the invention by laterally distancing at least one of the moulding tools (3, 4) from the sheet material leeway is provided for free forming of the tray side walls while wrinkling or tearing of the same is avoided. Spacer plates (13) may be positioned behind the plunger plate (11), to adjust its position in relation to the cavity (7) of the female moulding tool (3).
    Type: Application
    Filed: October 17, 2014
    Publication date: October 6, 2016
    Applicant: Stora Enso OYJ
    Inventors: Jari Räsänen, Henry Lindell, Kimmo Nevalainen, Panu Tanninen, Sami Matthews, Mari Hiltunen, Outi Kylliainen
  • Publication number: 20150041529
    Abstract: A deep-drawn paper tray made of paper material, a method and an apparatus for manufacturing the tray, and a closed product package comprising the tray. The tray having a bottom and upwardly expanding side walls around the bottom, the side walls of the tray being shaped to expand through a plurality of circumferential steps dimensioned low enough for obtaining wrinkle-free side walls for the tray. The outermost step is a flat, wrinkle-free rim flange, which enables liquid and gas proof heat-sealing of a lid to form the package. The apparatus may comprise upper and lower moulding tools with concentric movable frames for forming the tray bottom and side wall steps from paper blanks, and moulding tools may be mounted onto a rotating turret carrying a paper blank through working stations arranged along the turret circumference, to shape the tray bottom and the side wall steps at the consecutive stations.
    Type: Application
    Filed: March 15, 2013
    Publication date: February 12, 2015
    Inventors: Jari Räsänen, Niilo Pöyhönen, Mari Hiltunen, Outi Kylliäinen