| 摘要 |
<p>Vertical form-fill-seal packaging of a fluent product, such as flour, wherein flexible packaging material is formed into tubing (T) around a downwardly extending mandrel (13), the tubing is intermittently fed downwardly in package length increments off the lower end of the mandrel with a dwell between each successive feed, the tubing is transversely sealed at a level below the lower end of the mandrel during each dwell to form a top seal for a package being completed and a bottom seal for the next package, the tubing is severed between each top and bottom seal during each dwell, product being fed downwardly from the mandrel into the portion of the tubing, sealed at the bottom, being fed off the lower end of the mandrel, wherein the downward feed of the tubing and the feed of the product are such as substantially to fill the volume of the said portion of the tubing created by the downward feed of the tubing.</p> |
