| 摘要 |
<p>PURPOSE:To provide a heater for uniformly melting a resin layer by means of hot blast even if a substance having a low coefficient of thermal conductivity is used as a gas barrier layer. CONSTITUTION:This is a heater 1 for bringing hot blast against a part of a paper container comprising a paper material 37 and resin layers 39, 43 formed on the surface of the paper material 37 so as to melt the resin layer 43 on the part, and the heater 1 comprises a heating box 7 which is placed facing a portion where the resin layer 43 is to be melted with the hot blast supplied inside and numerous hot blast blowing holes 35 which are provided through a part of the heating box 7 facing the portion where the resin layer 43 is to be melted. An opening part 3505 facing the resin layer on the hot blast blowing hole 35 is formed with a larger diameter than a part of the hot blast blowing hole 35 which is distant from the resin layer 43.</p> |
