| 摘要 |
PROBLEM TO BE SOLVED: To provide a continuous heating method capable of heating even variant shape bottles uniformly to fit preventing generation of a wrinkle or unevenness and provide an apparatus for it. SOLUTION: The heating apparatus comprises a preheating part 11 to preheat a heat shrinkable film 2 and a main heating part 12 to shrink the preheated heat shrinkable film 2 to fit. A heating center position Oh is imagined on the main heating part 12 and at least two pairs of slit nozzles 12c opposing nearly point-symmetically to the heating center position are arranged and at least one pair is a slit nozzle 12c to blow hot air to the heating center and a recovery ports 12h, 12i to circulate hot air after heating through a partition member 12d, 12e are provided at the upstream end of transportation of the main heating part 12. By this uniform and sufficient heating can be carried out with four nozzles and hot air is sucked and circulated to prevent generation of temperature unevenness and prevent the inlet port side of the main heating part from becoming high temperature. COPYRIGHT: (C)2007,JPO&INPIT
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