Apparatus for shrink packaging专利检索-热辐射器太空飞行器与操作专利检索查询-专利查询网

Apparatus for shrink packaging

阅读：679发布：2024-01-02

专利汇可以提供Apparatus for shrink packaging专利检索，专利查询，专利分析的服务。并且Apparatus for shrink-packaging articles in a heat-sealable, heat-shrinkable plastic film wrapper, in which the wrapper is heated for heat-sealing by means located below the article as it is conveyed through the apparatus, this heat-sealing means being heated by thermal radiation from thermal radiation heaters within the apparatus, and in which the wrapper is heated for heatshrinking by thermal radiation from these heaters and by air heated by the heaters.，下面是Apparatus for shrink packaging专利的具体信息内容。

权利要求

1. Apparatus for packaging articles constituting the work to be packaged in heat-sealable, heat-shrinkable plastic film, comprising a tunnel means for conveying an item of work along a predetermined path through the tunnel with the work enwrapped in heat-sealable, heat-shrinkable plastic film and with the margins of the film overlapping one another at the bottom of the work for being heat-sealed together, said conveying means comprising a roller conveyor having a series of rollers inclined to the horizontal with one end constituting its entrance end at one end of the tunnel at a higher elevation than its other end constituting its exit end for gravity feed of the work through the tunnel, thermal radiation heating means mounted within the tunnel for directing thermal radiation toward the roller conveyor and hence toward work travelling on the conveyor through the tunnel for heating the film wrapped around the work as the work travels through the tunnel, at least one roller of said conveyor adjacent its entrance end constituting a heat-sealing roller for heating the said margins of the film on the bottom of an item of work as it travels over said heat-sealing roller to heat-seal the said margins of the film, said heat-sealing roller being blackened for being heated to sealing temperature by absorption of thermal radiation from said thermal radiation heating means, other rollers of said conveyor being unblackened and having a lower thermal radiation absorptivity factor than said heatsealing roller.

2. Apparatus as set forth in claim 1 wherein said conveyor has a series of said blackened heat-sealing rollers in a first zone adjacent the entrance end followed by a series of unblackened rollers in a second zone adjacent the exit end of the tunnel.

3. Apparatus as set forth in claim 2 having separate thermal radiation heating means for each of said zones, and means for selectively controlling the heating means in each zone.

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Apparatus for shrink packaging

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