Japan Crown Cork Co Ltd.

Toyo Seikan Kaisha, Ltd.

Yuji Kano

Seiji Fukushi

Hisashi Nakajima

Tsurusaburo Okamura

Fumio Kinoshita

Hiroshi Sato

Tateo Kubo

Kashiwa Murayama

Masakazu Tatsuta

Hideki Yajima

Yoshihiro Kaitsuka

Yoshiharu Shibata

Kinji Fuchie

A container closure formed from a synthetic resin as a single unit has a circular top panel wall and a cylindrical skirt wall extending downwardly from the peripheral edge of the top panel wall. An outer cylindrical sealing protrusion, an inner cylindrical sealing protrusion, and annular sealing ridge, all having a predetermined shape and a predetermined size, are formed on the inner surface of the top panel wall. In one embodiment, the thickness of the center portion of the top panel wall is reduced to a predetermined range and a plurality of ribs having a predetermined thickness are formed on the inner surface of the center portion of the top panel wall.

Synthetic resin container closure

A container closure has a top panel wall, and an annular seal piece and an annular contact piece are integrally formed in an outer peripheral edge portion of an inner surface of the top panel wall. The annular seal piece is of such a shape as to be deflected radially outwardly upon contact with the cylindrical outer peripheral surface of the mouth-and-neck portion of a container. The annular contact piece is brought into contact with an annular boundary surface extending from an annular top surface to an annular outer peripheral surface of the mouth-and-neck portion of the container when viewed arcuately in a sectional view. An annular thin-walled region positioned radially inwardly of the annular seal piece and the annular contact piece are further formed in the outer peripheral edge portion of the inner surface of the top panel wall.

Plastic container closure

A plastic cap comprising a cap proper composed of a top panel and a skirt side wall, and a circumferential band provided in the lower end of the skirt side wall, wherein a screw for screwably engaging with the outer circumference of the neck of the container is formed in the inner surface of the skirt side wall, from the lower end of the skirt side wall, a circumferential band extends downwardly via a breakable line a plurality of bridge portions, in the inner surface of the lower portion of the circumferential band, a protrusion engageable with an engageable protrusion formed in the outer surface of the neck of the container is formed, and at least one flexible fin extending diametrically inwardly is provided in the inner surface of the circumferential band. When the container is tilted, the flexible fin is hooked on the jaw portion of the neck of the container, and is not removed from the neck of the container. Accordingly, in pouring out the liquid within the container, a trouble of the circumferential band falling into a vessel such as a cup together with the liquid in the container can be effectively prevented.

Plastic cap

A molding system for molding a plastic grip member and, at the same time, linking it to a linking protruding piece of a container closure body. The molding system comprises a rotary container closure body conveyor apparatus and a compression molding apparatus. The container closure body conveyor apparatus is provided with a rotary disc that has a plurality of container closure body-receiving portions formed therein and a rotation preventing mechanism that prevents the rotation of the container closure bodies held in the receiving portions. The compression molding apparatus has a mold constituted by a first mold portion and a second mold portion. The first mold portion includes a moving member that moves between a mold position and a separated position. The moving member has a supporting surface for supporting the skirt wall of the container closure body and a support projection for supporting the linking protruding piece of the container closure body. A moving member-moving mechanism is disposed to selectively move the moving member to the mold position or to the separated position.

Apparatus for forming plastic grip member of container closure

A closure to be applied to a container for holding a liquid such as shampoo. The closure comprises a closure body, a discharge liquid tube extending through the closure body and a reciprocating air pump mechanism built in the closure body. The air pump mechanism includes a cylinder whose discharge side communicates with the inside of the container and whose intake side communicates externally of the container, a piston, and a spring for elastically biasing the piston toward the intake side. The piston has a rod whose free end portion extends outwardly of the closure body.

Container closure provided with air pump mechanism

A closure for containers comprises an automatic opening-closing mechanism and an outside closure member having a pour opening. The automatic opening-closing mechanism includes a plug member having a centrally formed air introduction hole and a plurality of liquid discharge ports formed around the air introduction hole, a first valve member for opening and closing the liquid discharge ports and a second valve member for opening and closing the air introduction hole.

Growing community of inventors

Hiratsuka, Japan

Yuji Kano