发明名称 |
HEAT SEALING A CONTAINER OPENING |
摘要 |
A packing container of the non-returnable type is frequently manufactured from laminated material which comprises a central carrier layer of paper with thermoplastic layers applied to both sides. As an opening arrangement, a pre-punched pouring opening is used which is covered on the one hand by a tear-off cover strip located outside the packing container and, on the other hand, by an inner protective strip. A method for sealing an emptying opening in accordance with the invention ensures that a part of the inner protective strip corresponding to the shape and size of the pouring opening accompanies the cover strip since the strips are heat-sealed to each other at the same time as they are pressed against each other by means of pressure fluid. An arrangement for carrying out the method comprises a heating device with a heatable zone and an outlet for pressure fluid. |
申请公布号 |
AU567783(B2) |
申请公布日期 |
1987.12.03 |
申请号 |
AU19840036811 |
申请日期 |
1984.12.14 |
申请人 |
TETRA PAK INTERNATIONAL A.B., |
发明人 |
JAN EBBE ROLAND LAGERSTEDT;BENGT-ARNE ARNSPANG |
分类号 |
B65B7/16;B29C65/00;B29C65/18;B29C65/78;B31B1/90;B65B61/18;B65D17/50 |
主分类号 |
B65B7/16 |
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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