Toppan Printing Co., Ltd.

Masaki Tomihari

Hideki Yamamoto

Takuya Adachi

Noriyuki Sasaki

Yoshiaki Take

Takahisa Hirayama

Yoshihiro Akima

In order to make the structure of the pouring spout simple by the use of a partial covering film, cover the inner peripheral surface around the pouring hole of the laminate base material properly, and prevent the contents from infiltrating into the inner peripheral surface around the pouring hole of the laminate base material, the present invention comprises the steps of attaching the inner waterproof layer and the partial covering film on the outer waterproof layer at the portion around the pouring hole, inside the pouring hole having penetrated through the laminate base material and the outer waterproof layer, boring a pouring spout on the attached portion, and attaching a tab tape to said partial covering film in a way capable of tearing off, so to cover the pouring spout.

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Tokyo, Japan

Masaki Tomihari