发明名称 |
METHOD FOR MANUFACTURING A BLOCK BAG |
摘要 |
A method for manufacturing a block bag of thermoplastic material with at least one filling valve from a tubular foil part having bottom flaps and at least one corner flap forming the valve being longer than the bottom flaps, wherein the bottom flaps are folded around a heat isolating piece and the stack of foils forming the bottom are heatsealed together by applying heat from both sides of the stack.
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申请公布号 |
US3688650(A) |
申请公布日期 |
1972.09.05 |
申请号 |
USD3688650 |
申请日期 |
1969.08.26 |
申请人 |
IND. ONDERNEMING WAVIN NV. |
发明人 |
JAN ROELOF JOCHEM DE VRIES |
分类号 |
B29C65/02;B31B29/00;B31B29/84;B65D30/18;B65D30/24;(IPC1-7):B31B49/04;B65D31/14 |
主分类号 |
B29C65/02 |
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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