Japan Crown Cork Co Ltd.

Shinya Matsumoto

Mitsuo Kumata

Hisashi Nakajima

Katsuhito Ichimura

Kouichi Tsuchiya

Kiyohisa Kaito

Shinji Ooka

Yuji Tomitaka

Manabu Aihara

Koji c/o Otsuka Pharmaceutical Co Ltd Kitano

Hiroshi Sato

A metallic container closure including a shell of a thin metal sheet having a circular top panel wall () and a skirt wall (), and a synthetic resin liner arranged in the shell, the skirt wall () having a thread-forming region and an annular groove () positioned at an upper end portion of the thread-forming region, wherein an internal pressure release line A extending in the circumferential direction is arranged in the skirt wall () at a portion over the annular groove (), and annular bead () is arranged so as to pass through between the internal pressure release line A and the annular groove ().

Metallic container closure having internal pressure release function

A metallic container closure comprising a shell of a thin metal sheet having a circular top panel walland a skirt wall, and a synthetic resin liner arranged in the shell, the skirt wallhaving a thread-forming region and an annular groovepositioned at an upper end portion of the thread-forming region, wherein an internal pressure release line A extending in the circumferential direction is arranged in the skirt wallat a portion over the annular groove, and annular beadis arranged so as to pass through between the internal pressure release line A and the annular groove. The metallic container closure effectively releases the gas when the pressure in the container is elevated and effectively prevents the skirt wall from being deformed at a portion where the internal pressure release line A is formed when it is being wrap-seamed with the mouth-and-neck portion of the container.

A plastic cap comprising a top panel and a skirt hanging down from the peripheral edge of the top panel, the inner surface of the top panel forming an inner ring that forms a seal upon coming into intimate contact with the inner surface of the wall of the mouth of a container, and the inner surface of skirt forming a screw thread that comes into engagement with a screw thread formed on the outer surface of the wall of the mouth of the container, wherein a slender recessed portion is formed in a number of at least one in the inner surface of said inner ring extending upward from an end thereof. The cap features both excellent sealing and excellent venting.

Plastic cap featuring excellent sealing and venting

Growing community of inventors

Hiratsuka, Japan

Shinya Matsumoto