| 摘要 |
<p>A package wrapping system compresses a package of napkins during wrapping to provide a tight wrapped package which does not become loose with settling. An air activated expandable elevator plate (101) allows the bottom of the napkin package to be completely supported during wrapping and contracts to allow the plate (101) to be lowered between front and rear underfolders (119a, 119b). An air activated movable top compression plate (117) applies variable downloading against the top of the package to compress the package as the elevator (101) is raised. The top compression plate (117) is then withdrawn to a position corresponding to the desired finished package height, and a sliding transfer of the package to a heat seal device (123) is performed. Downward pressure on the package during transfer is greatly reduced so that the napkins and wrap are not displaced from their proper positions prior to heat sealing.</p> |
