公开(公告)号：US10975522B2

公开(公告)日：2021-04-13

申请号：US16076197

申请日：2017-02-06

Applicant: Stora Enso OYJ

Inventor： Jari Räsänen ,  Mari Hiltunen ,  Ali Harlin ,  Hanna Koskela ,  Christiane Laine ,  Laura Kela

IPC: D21H21/22 ,  D21F11/00 ,  B31F1/00 ,  B65D1/34 ,  C08J9/16 ,  C08J9/228 ,  D21H21/56

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.

公开(公告)号：US20170305097A1

公开(公告)日：2017-10-26

申请号：US15518178

申请日：2015-10-08

Applicant: Stora Enso OYJ

Inventor： Jari Räsänen ,  Kimmo Nevalainen ,  Henry Lindell ,  Panu Tanninen ,  Sami Matthews ,  Mari Hiltunen ,  Outi Kylliainen

IPC: B31F1/00 ,  B65D1/34 ,  B65D1/26

CPC classification number: B31F1/0077 ,  B31B50/25 ,  B31B50/592 ,  B31B70/00 ,  B31B2100/0024 ,  B31B2160/10 ,  B65D1/26 ,  B65D1/34

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). The cavity may have a separate bottom plate (8) and spacer plates (9) therebelow, or screw means may be provided for adjusting the distance of the bottom of the cavi-ty from the clamp interface and thereby varying the depth of the tray.

公开(公告)号：US20150041529A1

公开(公告)日：2015-02-12

申请号：US14385011

申请日：2013-03-15

Applicant: STORA ENSO OYJ

Inventor： Jari Räsänen ,  Niilo Pöyhönen ,  Mari Hiltunen ,  Outi Kylliäinen

IPC: B31B49/02 ,  B65D1/34

CPC classification number: B65D1/34 ,  B29C51/08 ,  B29C51/082 ,  B29C51/087 ,  B29C51/22 ,  B29C51/24 ,  B29C2791/001 ,  B29C2791/002 ,  B29K2311/12 ,  B29K2311/123 ,  B29L2031/712 ,  B31B50/44 ,  B31B50/592 ,  B65D1/26 ,  B65D75/326

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.

Abstract translation: 由纸材制成的深拉纸托盘，用于制造托盘的方法和装置以及包括托盘的封闭产品包装。 托盘具有围绕底部的底部和向上扩张的侧壁，托盘的侧壁成形为通过多个周向台阶扩大，其尺寸足够低以获得用于托盘的无皱皱的侧壁。 最外面的步骤是平坦的，无皱纹的轮缘法兰，其能够使液体和气体不透热地密封盖以形成包装。 该装置可以包括具有同心可移动框架的上部和下部模制工具，用于形成托盘底部和从纸坯的侧壁台阶，并且模制工具可以通过沿着转盘圆周布置的工作台安装到携带纸坯的旋转转盘上， 在连续的站点形成托盘底部和侧壁台阶。