| 摘要 |
A method for sealing the ends of plastic tubes is disclosed. The sealing method provides a means to relieve the air pressure due to the heated air within a plastic tube thereby allowing the plastic tube to be reliably sealed with a heated surface. An air escape opening is provided near the end of the plastic tube. When the end of the plastic tube is heated, the air within the plastic tube will escape through the air escape opening to relieve the pressure within the plastic tube and maintains a constant atmospheric pressure as the heated surface softens and melts the plastic at the end of the plastic tube. As the air escape opening is sealed, the sealing of the open end of the plastic tube is also completed. As the heat source is removed, the air pressure within the sealed plastic tube will not have sufficient force to rupture the sealed end thereby the plastic tube is sealed reliably.
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