| 摘要 |
<p>Apparatus for heat shrinking plastic wrapping film about objects of one type of another, such as packages and produce, in which the apparatus is provided with a metallic heat conductor in which the belt has a slight degree of longitudinal elasticity. A heat platen is positioned underneath the belt in heat conductive relation to heat the belt so that articles wrapped with plastics film may be heated to tack the edges of the film together by heat shrinking operations, after which the partially wrapped package is fully heat shrunk in passing through a heat funnel. The metallic belt has longitudinal metallic strands having a longitudinal spring action which maintains the belt upon a biased roller and a driven roller thereby maintaining tension on the belt. The spring action of the belt and the biasing action of the rollers prevent the belt from being damaged and will also maintain it in proper relationship on the rollers.</p> |
