发明名称 |
Thermoplastic film hollow body - open at both ends and heated to its cross sectional shape |
摘要 |
The plastic film is rolled off of a delivery roll and cut into sections in which a section is placed around a forming mandrel so that the longitudinal edges overlap and can be sealed together. Finally, the heat is applied to disperse the tension caused by overlapping, so that the tube maintains its cross sectional shape rather than returning to a round shape. |
申请公布号 |
DE2057423(A1) |
申请公布日期 |
1972.05.31 |
申请号 |
DE19702057423 |
申请日期 |
1970.11.21 |
申请人 |
AVI GMBH KUNSTSTOFF-VERPACKUNGEN |
发明人 |
SCHMID,HANS |
分类号 |
B29C53/04;B29C53/42;B29C53/84;B29C71/02 |
主分类号 |
B29C53/04 |
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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