发明名称 |
Rotary draw tape bag making apparatus and method |
摘要 |
An apparatus is provided for continuously sealing a thermoplastic draw tape to a thermoplastic bag at a sealing section. The bag forms one of a plurality of bags formed on a continuous web of thermoplastic material. The bag includes a hem defining a channel wherein the draw tape is disposed. The section of the bag which includes the hem and the tape thus includes a plurality of layers of thermoplastic material. The apparatus comprises a conveyor for continuously moving the web; a first sealing station for forming a heat seal through at least two of the layers of the hem and tape, the seal being formed on a first side of the bag; and a second sealing station for forming a heat seal through the rest of the layers of the hem and tape at the sealing section on a second side of the bag. The first and second sealing stations form the seals while the web is continuously moved by the conveyor.
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申请公布号 |
US5024642(A) |
申请公布日期 |
1991.06.18 |
申请号 |
US19880280027 |
申请日期 |
1988.12.05 |
申请人 |
PRESTO PRODUCTS, INCORPORATED |
发明人 |
BUCHMAN, JAMES E.;JAHNKE, KENNETH C. |
分类号 |
B31B19/90 |
主分类号 |
B31B19/90 |
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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