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    • 1. 发明申请
    • DEEP-DRAWN PAPER TRAY, A METHOD AND AN APPARATUS FOR MAKING IT, AND A TRAY-FORMED PRODUCT PACKAGE
    • 深层纸托盘,一种制造它的方法和装置以及托盘形成的产品包装
    • WO2013140034A1
    • 2013-09-26
    • PCT/FI2013/050296
    • 2013-03-15
    • STORA ENSO OYJ
    • RÄSÄNEN, JariPÖYHÖNEN, NiiloHILTUNEN, MariKYLLIÄINEN, Outi
    • B65D1/26B29C51/08B32B38/12B65D1/34
    • B31B49/02B29C51/08B29C51/082B29C51/087B29C51/22B29C51/24B29C2791/001B29C2791/002B29K2311/12B29K2311/123B29L2031/712B31B50/44B31B50/592B65D1/26B65D1/34B65D75/326
    • The invention concerns a deep-drawn paper tray (4), particularly a shallow tray made of paperboard or cardboard, a method and an apparatus for manufacturing such a tray by deep-drawing techniques, and a closed product package comprising the tray of the invention, particularly a heat-sealed gas- and liquid-tight food package. The tray comprises a bottom (4a) and upwardly expanding side walls around the bottom, the side walls of the tray being shaped to expand through a plurality of circumferential steps (4b, 4c, 4d) dimensioned low enough for obtaining wrinkle-free side walls for the tray. The outermost step is a flat, wrinkle-free rim flange (4d), which enables liquid and gas proof heat-sealing of a lid to form the package. The apparatus according to the invention may comprise upper and lower moulding tools (10, 11) with concentric movable frames (10b, 10c, 10d) for forming the tray bottom and side wall steps to paper blanks, and moulding tools (10) may be mounted onto a rotating turret (9) 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.
    • 本发明涉及深拉纸盘(4),特别是由纸板或纸板制成的浅盘,通过深冲技术制造这种托盘的方法和装置,以及包括本发明的托盘的封闭产品包装 ,特别是热密封的气体和液密食品包装。 托盘包括底部(4a)和围绕底部的向上扩张的侧壁,托盘的侧壁成形为膨胀通过多个周向台阶(4b,4c,4d),其尺寸足够低以获得无皱纹的侧壁 为托盘。 最外面的步骤是平坦的,无皱纹的边缘凸缘(4d),其能够使液体和气体不透热地密封盖以形成包装。 根据本发明的装置可以包括具有用于形成托盘底部的同心可移动框架(10b,10c,10d)的上部和下部模制工具(10,11),并且模制工具(10)可以是 通过沿着转盘圆周布置的工作台将其安装到携带纸坯的旋转转台(9)上,以便在连续的台站处形成托盘底部和侧壁台阶。