Yamanouchi Pharmaceutical Company Ltd.

Daikyo Gomu Seiko, Ltd.

Daikyo Gomu Sekio Ltd.

Yutaka Tatsumi

Tamotsu Okuda

Denpei Sudo

Hideo Yoshitaka

Tatsuya Matsunaga

A process for molding a resin-laminated rubber closure for a medical vial. This closure includes an annular leg part to be inserted into the mouth of the vial, which leg part is notched or cut at least at one position and a flange part to be contacted with the front surface of the vial mouth. The outer and inner surfaces of the annular leg part are laminated with a chemical-resistant resin film except for the upper end of the leg part so that the rubber surface is exposed at the upper end of said leg portion. The leg part has at least one protrusion on the outer surface of the laminated portion.

Process for the production of a resin-laminated rubber closure for a

A resin-laminated rubber closure for a medical vial is provided herein. This closure comprises an annular leg part to be inserted into the mouth of the vial, which leg part is notched or cut at least at one position and a flange part to be contacted with the front surface of the vial mouth, wherein the outer and inner surfaces of the annular leg part is provided with a chemical-resistant resin film laminated thereon except for the upper end of the leg part so that the rubber surface is exposed at the upper end of said leg portion, and wherein the leg part has at least one protrusion on the outer surface of the laminated portion. The present invention also relates to a molding process for economically producing said closure.

Resin-laminated rubber closure for a medical vial

Growing community of inventors

Yaizu, Japan

Yutaka Tatsumi