Nippon Paper Industries Co., Ltd.

Nippon Paper-Pak Co., Ltd.

Eiichi Asoi

Kouya Nakamura

Kazuhiko Sase

Kazuhide Onomura

Kenji Tanaka

Yoshitaka Yoneda

Takashi Omori

Yukihiro Tanaka

Susumu Onodera

Tatsuo Wada

Shigekazu Miyagawa

A paper container includes a body front panel (), a body left side panel (), a body right side panel (), and a body back panel (), which are contiguous through body vertical folding lines. A vertical direction sealing panel () is configured to form a quadrangular tubular body (). A top portion () has an inclined surface (S) which is lower on the body front panel side and higher on the body back panel side. The inclined surface has an opening, and a spout is provided at the opening. The body vertical folding line through which the body front panel and the body right side panel are contiguous with each other and the body vertical folding line through which the body front panel and the body left side panel are contiguous with each other are approximately symmetrical bent lines bent toward a center of the body front panel.

Paper container

A liquid paper container capable of preventing leakage of a liquid and intrusion of, for example, air into the container through a gap between a part of a corresponding one of top-portion horizontal folding creases formed in a blank sheet and a top-portion horizontal folding crease formed in a side sealing panel, which overlap with each other, top panels () and side panels () are respectively contiguous with upper ends of body panels through top-portion horizontal folding creases (). Bottom panels () and inner panels () are respectively contiguous with lower ends of the body panels through bottom-portion horizontal folding creases (). A side sealing panel () is contiguous with a one-side open end edge of a blank sheet (A). A top-portion horizontal folding crease () and a bottom-portion horizontal folding crease () are formed in the side sealing panel.

Liquid paper container

A paper container includes a body front panel (), a body left side panel (), a body right side panel (), and a body back panel (), which are contiguous through body vertical folding lines (), (), (), and (). A vertical direction sealing panel () is configured to form a quadrangular tubular body (). The body vertical folding line () and the body vertical folding line () are approximately symmetrical bent lines bent toward a center of the body front panel (), and the body vertical folding line () through which the body back panel and the body left side panel are contiguous with each other and the body vertical folding line () through which the body back panel and the body right side panel are contiguous with each other are approximately symmetrical bent lines bent toward a center of the body back panel.

A paper container for fluid including a spout plug, in which the spout plug is formed of a spout positioned on a spout hole part for cutting and opening and incorporates a rotary opening blade and a cap. The spout plug is fitted to a top panel, which includes the spout hole part for cutting and opening in which a spout hole is formed in a paper base material and is sealed by a sealing layer. The contained further including a cut and opened piece fall prevention mechanism produced when the sealing layer is cut and opened by the rotary opening blade of the spout plug and capable of preventing a part of the cut and opened piece of the sealing layer from being cut off and giving hinge function to the uncut part of the cut and opened piece in the spout hole part for cutting and opening.

Paper container for fluid having spout plug

Growing community of inventors

Tokyo, Japan

Eiichi Asoi