# US 2013/0240477 A1 · Synthetic resin bottle

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- Number: US 2013/0240477 A1
- Document ID: US20130240477A1
- Status: Published application
- Kind: A1
- Application number: 13/846,431
- Filed: 2013-03-18
- Published: 2013-09-19
- Earliest claimed: 2008-11-27
- Assignees: Yoshino Kogyosho Co., Ltd.
- Inventors: Hiromichi SAITO; Tadayoshi OSHINO; Tsutomu ASARI
- Web page: https://patentgrep.com/patent/US20130240477A1

## CPC

- B65D 1/0276: {having a continuous contact surface, e.g. Champagne-type bottom}
- B65D 1/0261: {Bottom construction (B65D1/06 takes precedence)}
- B65D 79/0081: {in the bottom part thereof}
- B65D 2501/0036: Hollow circonferential ribs
- B65D: CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES

## Abstract

A biaxially stretched, blow molded synthetic resin bottle with a bottom includes a sunken bottom portion that is capable of drawing upward in a reversible manner, when internal pressure goes down. This sunken bottom portion includes an inner peripheral wall portion standing from near an inner edge of a ground contact portion disposed along a peripheral foot, a central concave portion disposed at a center of the bottom, a reversible wall portion in a flat ring shape, which is reversibly deformable into an upward drawing state and which connects an upper end of the inner peripheral wall to the base of the central concave portion, and a circular rib wall portion disposed at a connection between the reversible wall portion and the upper end of the inner peripheral wall portion so as to perform the function as a peripheral rib.

## Claims

### Claim 1

A biaxially stretched, blow molded synthetic resin bottle with a bottom comprising:
a bottom ridge disposed inward from peripheral foot and formed by projecting a portion of a bottom plate downward to a position lower than a level of the peripheral foot so that the bottom ridge performs a function as a ground contact portion, and
a central concave portion formed by concaving the bottom plate upward and inward, starting from an edge of an inner sidewall of the bottom ridge,
the bottle being characterized in that:
the bottom plate ranging from the bottom ridge to the central concave portion performs the vacuum-absorbing function as the bottom plate in this range draws upward with progress of internal depressurization,
in this state, the peripheral foot instead of the bottom ridge is assigned to perform the function as the ground contact portion, and
the peripheral foot has always a surface sloped obliquely upward in a central axial direction of the bottle under a depressurized condition, as well as under a condition in which the bottom ridge projects downward to the position lower than the level of the peripheral foot and performs the function as the ground contact portion.

### Claim 2 (depends on 1)

The synthetic resin bottle according to claim 1, wherein the peripheral foot has a width in a range of 2 to 4 mm and has a difference in height in a range of 0.2 to 0.8 mm between a lower end and a sloped inner edge of the peripheral foot.

### Claim 3 (depends on 1)

The synthetic resin bottle according to claim 1, wherein the bottom ridge is a circular bottom ridge.

### Claim 4 (depends on 1)

The synthetic resin bottle according to claim 1, wherein the central concave portion is disposed on an inner sidewall of the bottom ridge by way of a step.

### Claim 5 (depends on 1)

The synthetic resin bottle according to claim 1, wherein the bottom ridge has a cross-section of a trapezoidal shape or a U-letter shape.

### Claim 6 (depends on 1)

The synthetic resin bottle according to claim 1, wherein the central concave portion has a shape in which its cross-section changes from a circular shape in and near the central area to a regular triangular shape at the base.

### Claim 7 (depends on 1)

The synthetic resin bottle according to claim 1, wherein a groove-like recess is disposed on the boundary between an inner edge of the peripheral foot and an outer edge of the bottom ridge, the recess being formed by depressing the bottom plate upward and inward in a stepped manner.

### Claim 8 (depends on 1)

The synthetic resin bottle according to claim 1, wherein the bottle has a round shape and is provided with multiple peripheral groove ribs in the wall of a cylindrical body.