Yoshino Kogyosho Co., Ltd.

Tadayoshi Oshino

Hiromichi Saito

Tsutomu Asari

Junichi Chiba

Takuya Nishimura

Hirohisa Yamazaki

Tsumotu Asari

A synthetic resin container has an outer layer body and an inner layer body and formed by biaxial stretching blow molding. The synthetic resin container has a cylindrical mouth portion, a shoulder portion located below the mouth portion and having a diameter gradually increasing downward, a body portion being continuous with a lower end of the shoulder portion, and a bottom portion configured to close a lower end of the body portion. The mouth portion has an outside air introduction port configured to introduce outside air between the outer layer body and the inner layer body, and the shoulder portion has at least one shoulder rib forming a concave or convex shape and extending from the mouth portion side to the body portion side.

Synthetic resin container

The present invention is a bottle that is formed from a synthetic resin material in a cylindrical shape having a bottom at one end, including: a plurality of circumferential grooves that extend continuously around the entire circumference of a body portion and are formed at a distance from each other in a vertical direction. The circumferential grooves extend cyclically in a circumferential direction while undulating in the vertical direction when viewed from the side of the body portion as to form wave patterns, and the respective phases of circumferential grooves that are mutually adjacent to each other in the vertical direction are offset from each other.

Bottle

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.

Synthetic resin bottle

Disclosed is a bottomed tubular bottle including an annular groove which is formed so as to be circumferentially and radially recessed inward along the outer peripheral surface of a body of the bottle with a bottle axis as a center and which contracts and deforms the body in the axial direction of the bottle when the internal pressure is reduced. The annular groove is recessed and formed by a first wall surface arranged on a mouth side of the bottle and a second wall surface arranged on a bottom side of the bottle. The body is formed so that the outer diameter on the bottom side is larger than the outer diameter on the mouth side with the annular groove interposed therebetween.

A biaxially stretched, blow molded synthetic resin bottle with a bottom comprising a sunken bottom portion, which is formed by contouring and concaving the bottom plate upward in a direction of bottle inside, starting from an inner edge of a ground contact portion disposed along the peripheral foot, the sunken bottom portion being capable of drawing upward in a reversible manner, when internal pressure goes down.

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Tokyo, Japan

Tadayoshi Oshino