发明名称 |
Bag sealing system and method |
摘要 |
A system for sealing thermoplastic film includes one or more bag sealing units, each comprising a lower vacuum platen and a vacuum chamber cover adapted for sealing engagement on the platen to form a vacuum chamber. A sealing bar assembly includes a sealing bar designed for constant heated operation and a pair of cooling plates which function as heat sinks. The sealing bar assembly is pneumatically reciprocated between a raised, disengaged position and a lowered position with the sealing bar engaging the neck of a bag for hermetically sealing same. The cooling plates clamp the bag neck against a sealing support assembly. A method of sealing a thermoplastic film bag includes the steps of placing a packaging object in a thermoplastic bag and placing the bag on a cradle with the bag neck extending over a bag support assembly. A vacuum chamber cover is placed on the platen and evacuated to form a vacuum chamber. A sealing bar assembly melds the thermoplastic to form a sealed area across the bag neck. A cutoff knife blade severs the end of the bag beyond a sealed area, which extends across its neck.
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申请公布号 |
US6862867(B2) |
申请公布日期 |
2005.03.08 |
申请号 |
US20030345763 |
申请日期 |
2003.01.16 |
申请人 |
PACK-TECH, L.L.C. |
发明人 |
CADY DERRIL R.;TAYLOR, SR. MARK W.;BALEK THEODORE A. |
分类号 |
B29C65/00;B29C65/18;B29C65/74;B65B31/02;(IPC1-7):B65B31/00 |
主分类号 |
B29C65/00 |
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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