| 摘要 |
A heating device for heat-sealing containers by heating an end forming portion 13 of a tubular container having a rectangular to square cross section, the end forming portion 13 having four generally quadrilateral first to fourth panels 21 to 24 continuous with one another and each having a heating region 31, 32, 33 or 34 to be heated on an inner surface thereof. The heating device has a hot air nozzle 71 in the form of a bottomed tube and fittable into the container end forming portion 13 for heating an inner surface of the container. The nozzle 71 has four side walls 81 to 84 continuous with one another and corresponding to the first to fourth panels 21 to 24 respectively, at least one of the side walls 81 to 84 being provided with a hot air discharge portion 121, 122, 123 or 124 having orifices 111 and to be opposed to the heating region of the corresponding panel 21, 22, 23 or 24 and with a hot air nondlscharge portion 125, 126, 127 or 128 other than the discharge portion, the hot air nondischarge portion being at least partly provided with a hot air escape portion 95, 96, 97 or 98. |
