Japan Crown Cork Co Ltd.

Toyo Seikan Kaisha, Ltd.

Hidehiko Ohmi

Tateo Kubo

Mitsuo Kumata

Tomoya Igarashi

Kazuhisa Ishibashi

Misao Ohno

Shoji Morimoto

Mituru Shionoya

Katsuhisa Kitagawa

Kouzo Nakamura

Seitaro Takahashi

A container closure is composed of a closure body, an outflow tube, and an outer cap. The outflow tube is pivotably mounted on the closure body. The outer cap is mounted on the closure body pivotably between a closed position and an open position. When the outer cap is pivoted from the closed position toward the open position, the outer cap contacts the outflow tube located at the closed position to erect the outflow tube from the closed position to the outflow position. The outer cap is then separated from the outflow tube and brought to the open position. When the outer cap is pivoted from the open position toward the closed position, the outer cap contacts the outflow tube located at the outflow position to tilt the outflow tube from the outflow position to the closed position, and the outer cap is also brought to the closed position.

Container closure with outflow tube

A plastic cap of this invention is opened by tearing-off and is comprising a top plate provided with a sealing portion to be engaged with the mouth of a container, a skirt extending perpendicularly from the top plate, and a tear-off portion arranged around the skirt and defining an upper closure portion for resealing and a lower opening band, wherein in the inner surface of the skirt, at an upper position than the tear-off portion, a diametrically inwardly-directed protrusion which is engaged with a jaw of the container is formed peripherally intermittently, simultaneously, at a lower position than the tear-off portion, a flap piece whose tip portion is engaged with the jaw of the bottle is formed peripherally intermittently, and the engaged protrusion and the flap piece are formed at least alternately in most of the peripheral direction. The plastic cap has excellent sealing reliability, easy openability, and tamper-evident property while the cap height is lowered and the resin weight of the resin is reduced.

Plastic cap

Container closure

A cap comprises a cap body fitted and secured to the mouth of a container, an upper closure provided in the cap body, and a ring-like member which covers the outer surface of a skirt portion of the cap body. The ring-like member and the skirt portion are coupled together through breakable bridge portions. These two members are separated away from each other via cut surfaces but are intimately contacted to each other at the cut surfaces. The cap can be easily removed by hand from the mouth of the container, and can be separated from the container at the time of disposal.

Cap separable from bottle at the time of disposal

A plastic container closure comprising a top panel, a skirt portion, an annular protruded portion that is formed inwardly from the inner surface of the top panel and on the inside of a portion near the root of the skirt maintaining a small gap therebetween, and a sealing liner that is fitted by press-molding on the inside of the top panel, wherein a substantially vertical portion is formed on said liner along the inner surface of the annular protruded portion, and sealing performance is maintained by the engagement between the outer edge of the mouth of the container and the substantially vertical portion. Since the sealing is accomplished over a surface having a predetermined width in the up-and-down direction, the sealing performance is not impaired even when the top panel is deformed by the pressure. Moreover, favorable sealing performance is maintained even against shock that is given to the container at the time of fitting the closure.

Method of producing a plastic container closure

A hinged cap comprising a cap body, an outer cylinder formed integrally with said cap body so as to cover the outer surfaces of said cap body and said skirt portion, and an upper closure coupled by hinges to the upper end portion of said outer cylinder, wherein the skirt portion of said cap body is provided with a plurality of slits extending in the axial direction maintaining a distance in the circumferential direction, the skirt portion of said cap body and said outer cylinder are separated away from each other via cut surfaces but are formed integrally together via a plurality of breakable bridge portions and are formed on the upper side or the lower side of the cut surfaces, and the outer surface of the skirt portion of the cap body and the inner surface of the outer cylinder are intimately contacted to each other at the cut surfaces in a state where at least the cap body is fitted to the mouth of the container. The cap has a highly reliable sealing structure and, after used, can be easily removed from the mouth of the container without using any tool. The cap can be produced through a series of steps and offers excellent tamper-evidence.

Hinged cap separable from bottle at the time of disposal

Plastic container closure with high sealing precision

The resin cap of this invention comprises a cap proper provided with a skirt portion and a continuous ring member provided so as to cover the outer surface of the skirt portion of the cap proper. A plurality of axially extending cuts are circumferentially spaced in the skirt portion of the cap proper, and the skirt portion of the cap proper and the ring-like member are separated via a cutting surface, but are integrally formed via a plurality of frangible bridge portions or connecting portions upwardly or downwardly of the cutting surface. The outer surface of the skirt portion of the cap proper and the inner surface of the ring-like member are intimately adhered at a portion of the cutting surface. This cap can form a sealing structure having sealing reliability, and can be opened without using any particular tool. Furthermore, it has excellent tamper-evident characteristics.

Resin cap

A container closure includes a plastic shell, and a liner molded by fluidizing a plastic material within the shell. Depressions are formed at circumferentially spaced positions at an upper end portion of the inner peripheral surface of the skirt wall. The depressions each have a circumferential length increased radially outwardly at least in part thereof. A plurality of projections are formed on the outer peripheral surface of the liner in correspondence with the depressions.

Container closure with a plastic liner having projections extending into

An internal thread is formed on the inner peripheral surface of a skirt wall in a container closure of a plastic. The cross-sectional shape of the internal thread is defined by an upper side edge extending radially inwardly in an axially downwardly inclined manner, a lower side edge extending radially inwardly in an axially upwardly inclined manner, a front edge extending substantially vertically, two concave arcs, and two convex arcs.

Plastic closure with structural thread formation

A container closure in the form of a metal shell having a plastic liner press-formed onto the inner top surface of the shell. The liner has at least two circular downwardly projecting rims with the radially inner rim having a greater projected height than said radially outer rim.

Container closure having an improved liner

A closure (2) having a metal shell (4) and a synthetic resin liner (10) having a first annular projection (12) and a concentric second annular projection (14). The second annular projection is adapted to engage and seal with an upper surface (24b) of the mouth (18) of a container with an inner peripheral surface (12a) of the second annular projection is adapted to engage the outer peripheral surface (24a) of the mouth (18) of the container.

Closure having an improved liner

An apparatus for dispensing and molding lining material into metallic cap shells. The apparatus has a conveyor mechanism for conveying shells from a shell supply station to a lining material dispensing station and then on to a shell transfer station including a molding mechanism for molding lining material in the shells. An induction heater heats the shells moving from the supply station to the lining material dispensing station and from the dispensing station to the shell transfer station.

Apparatus for dispensing and molding lining material into metallic cap

Apparatus for distributing lining material in cap shells where the apparatus has a lining material extrusion means including an extrusion passage positioned above a path of cap shells moving through the apparatus and a rotatable knife positioned above the exit end of the extrusion passage for cutting lining material as it is extruded from the passage. A drive means is provided for rotating the knife and is connected to the knife by means of a transmission means. The transmission means includes at least two sets of non-circular gear pairs with the relative angle between the sets being adjustable whereby the rotational speed of the knife may be varied.

Apparatus for distributing lining material in cap shells

An apparatus for dispensing predetermined amounts of lining material into cap shells, particularly of the deeply recessed type, includes a conveyor including a passage for conveying cap shells at predetermined speeds, an extruder provided above and along the shell-conveying passage for extruding predetermined quantities of a lining material through a discharge passage, a blade fitted adjacent to the exit end of the discharge passage and rotatably across it for cutting the lining material, and a drive for rotating the blade in response to the conveying of the cap shells. The drive is adapted to rotate the blade at a non-uniform speed in response to the speed of shell conveyance so that its speed gradually decreases as the exterior end of the blade in its radial direction approaches the shell-conveying passage, and gradually increases as it departs from it, whereby collision between the tip of the blade and the cap shells can be completely avoided.

Growing community of inventors

Hiratsuka, Japan

Hidehiko Ohmi