Toppan Printing Co., Ltd.

Yoshihiro Akima

Yoshiaki Take

Hideki Yamamoto

Takuya Adachi

Noriyuki Sasaki

Makoto Igarashi

Takahisa Hirayama

Jun Sada

Nobumasa Yamazaki

Teruaki Iyori

Masaki Tomihari

Kunihiko Aso

Hiroya Shiki

Sakae Furuki

Tadayo Hirano

Noriko Morita

A heat insulating cup comprises a cup body and a protective cover. The cup body has side wall and a bottom wall. The protective cover is adhered to the cup body to cover the entire outer circumferential region of the side wall. The upper end portion of the side wall is folded outward along the open upper circumferential edge of the cup body to form a flange portion. The protective cover comprises an embossed paper sheet having a dotted pattern of embossed points and a paper liner board adhered to the embossed paper sheet. The embossed paper sheet has a basis weight of 50 to 180 g/m.sup.2, with the liner board having a basis weight of 180 to 270 g/m.sup.2. A laminate structure prepared by adhering the liner board to the embossed paper sheet is die-cut to prepare a blank of the protective cover. The blank is adhered to the side wall of the cup body such that the both side end regions of the wound blank are arranged opposite each other.

Heat insulating cup and method of manufacturing the same

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.

Pouring spout structure for paper carton, paper carton having pouring

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Tokyo, Japan

Yoshihiro Akima