| 摘要 |
PURPOSE:To perform sealing with reliability by covering the upper opening of a case body having a form holding property which has been packed with a toner, with a film, and bringing the film to heat seal to an opening edge of the case body. CONSTITUTION:A film 2 which can execute heat seal is used as the upper cover for sealing up tightly the upper opening of a case body 1 having a form holding property. For instance, the case body 1 is molded by using a high impact styrol resin, and a polystyrol resin is used as the film 2 for sealing its upper opening part. The upper opening of the case body which has been packed with a toner is covered with the film 2, and its peripheral edge part is joined to the upper opening edge of the case body 1 by heat seal. Also, a cover 5 which is opened and closed by moving it in the direction as indicated with an arrow is provided on a toner discharge port of the bottom part of the case body 1. In this way, the upper opening of the case body can be sealed up tightly, easily and exactly. |
