Synthetic resin container having inverted, folded back bottom wall

Patent metadata

Field	Value
Publication number	US-10023347-B2
Application number	US-201514606554-A
Country	US
Kind code	B2
Filing date	Jan 27, 2015
Priority date	Dec 25, 2008
Publication date	Jul 17, 2018
Grant date	Jul 17, 2018

Abstract

Disclosed is a synthetic resin container provided with an inverting, foldback bottom wall that can maintain a stable, self-supporting position while being able to minimize the amount of residual contents, and that can be formed by blow-molding, etc., and maintain the favorable producibility or low cost of the past. The synthetic resin container is provided with a bottom wall that forms the bottom of the container, and a drum section that is united to the perimeter of the bottom wall and forms a filling space M for contents on the inside, and is a synthetic resin container wherein a raised bottom is formed by inverting and folding back said bottom wall toward said drum section. Said drum section has a lower peripheral wall that touches or approaches the outer wall part of said bottom wall and forms a self-supporting base by the inversion and folding back of said bottom wall.

First claim

What is claimed is:

1. A synthetic resin container having a bottom wall for forming a bottom portion of the container, and a body portion connecting integrally with an outer periphery of the bottom wall to define a space for filling a content therein, the bottom wall being inverted and folded back toward the inside of the body portion to form a raised bottom, wherein:
the body portion has a cylindrical or elliptically cylindrical shape;
the synthetic resin container is configured so that, prior to inverting the bottom wall:
an outer-side wall portion having the same cylindrical shape as the body portion has is provided so as to extend downward from a lower edge of the body portion;
a wall for forming the raised bottom is provided so as to extend from a lower edge of the outer-side wall portion; and
the outer-side wall portion is formed so as to be invertible upward so that the bottom wall can fold inwardly at the lower edge of the body portion; and

the synthetic resin container is configured so that, when the outer-side wall portion is inverted upward:
an inner surface of the outer-side wall portion is brought into liquid-tight contact with a lower end of an inner surface of the body portion to form a self-standing foot, the raised bottom, and a liquid pool at the central portion of the bottom wall;
at least a lower end of the body portion has a polygon-cylinder-like shape; and
the liquid-tight contact is formed so that liquid cannot enter the self-standing foot.

2. The synthetic resin container according to claim 1 , wherein each corner region of the outer-side wall portion has a wall thickness thinner than the other portions thereof have.

3. The synthetic resin container according to claim 1 , wherein each corner region of the outer-side wall portion is formed in an arcuately curved shape.

4. The synthetic resin container according to claim 1 , wherein upper and lower edge portions of the outer-side wall portion are connected via a thin hinge with a lower edge of the body portion and a peripheral edge of the wall for forming the raised bottom, respectively.

Assignees

• Yoshino Kogyosho Co Ltd

Inventors

• Hayakawa Shigeru
• Kitamura Yoshiharu
• Suzuki Kazuo

Classifications

• B05B11/1047

  the pump being preassembled as an independent unit before being mounted on the container · CPC title

• B65D1/0276 Primary

  having a continuous contact surface, e.g. Champagne-type bottom · CPC title

• B65D1/0261

  Bottom construction (B65D1/06 takes precedence) · CPC title

• B65D83/00

  Containers or packages with special means for dispensing contents (dispensing means incorporated in closures B65D47/00) · CPC title

• B65D1/0292

  Foldable bottles · CPC title