| 摘要 |
A method and apparatus for shrink-wrapping a heat sealable thermoplastic film about regular and irregular shaped articles is provided, wherein the film is provided above and below the article, one or more heat-sealing blades are generally configured to the article exterior contour to heat seal the film material about the article, the heat-sealing blade having an electrically actuated healing element within insulated material, and the spacing of the heat-sealing blade adjacent the article is intentionally non-uniform in predetermined manner. A contoured heat-sealing blade assembly is provided within split-molds, which may have associated heating ports to control the temperature of the sealing operation within different zones of the mold.
|
