发明名称 |
A METHOD FOR MANUFACTURING A BOARD TRAY, A BLANK FOR THE TRAY, AND A TRAY OBTAINED BY THE METHOD |
摘要 |
The invention relates to a method for manufacturing a board tray (7), to a tray blank feasible for the method, and to a tray obtained by the method. The method comprises moulding a blank of plastic-coated board into the tray (7) comprising a bottom (3), side walls (4), as well as a rim flange (5), the blank being compressed in a direction transverse to the tray's side walls and rim flange. According to the invention, the blank is made thinner on its side opposite to the plastic coating such that, during , the moulding process, the plastic coating double-folds at the compressed parts and stabilizes compressions (8) by becoming sealed to itself. Making the blank thinner is most conveniently effected by carving the board layer with a laser beam for having the fiber material predominantly or completely removed from where the cuts are located. As a result of the moulding process, the tray's rim flange (5) develops a smooth plastic surface which enables closing the tray hermetically with a heat-sealed cover. |
申请公布号 |
WO2007036598(A1) |
申请公布日期 |
2007.04.05 |
申请号 |
WO2006FI00317 |
申请日期 |
2006.09.28 |
申请人 |
STORA ENSO OYJ;MAEAETTAE, PAEIVI;VESANTO, RISTO;TANNINEN, PANU;LAAKSO, PETRI;HOVIKORPI, JARI |
发明人 |
MAEAETTAE, PAEIVI;VESANTO, RISTO;TANNINEN, PANU;LAAKSO, PETRI;HOVIKORPI, JARI |
分类号 |
B65D1/34;B29C43/20;B31B45/00;B32B27/10;B65B43/08;B65D;B65D1/40 |
主分类号 |
B65D1/34 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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