A preform is provided for blow-molding to form a container. The preform includes a finish portion for rotatably engaging a closure to seal contents within an interior of the container. The finish portion comprises a cylindrical body that begins at an opening to the interior and extends to and includes a tamper evidence ledge. A bevel at a beginning of the opening receives a plug seal of the closure. A sealing surface adjacent to the bevel is disposed along an interior of the finish portion and includes a polished buffer zone to cooperate with the plug seal to seal the container. A transition surface extends from the sealing surface to a handling surface that receives equipment to form the preform into the container. In some embodiments, the transition surface includes a polished buffer zone to cooperate with an end of the plug seal to seal the contents in the container.

A closing element for restricting communication of a substance through an access passage of a body includes a first portion for being removably affixed to the body, the first portion having an inner wall, an outer wall surrounding the inner wall, and at least one bridge connecting the outer wall with the inner wall. The closing element has a second portion for being non-removably affixed to the body and a movable connecting element extending between the first portion and the second portion. The closing element has an unactuated configuration wherein a major portion of the length of the connecting element is located laterally between the inner wall and the outer wall to shield the major portion of the length of the connecting element.

A cap includes: a cap body including a top plate and a skirt having a tubular shape disposed on a circumferential edge of the top plate, a sealing member disposed on an inner surface of the top plate and configured to seal a mouth of a container, a slit extending in a circumferential direction of the skirt, and a worked portion formed at least in a part of the slit in the circumferential direction on at least a side of the slit closer to the top plate.

A cap for a container comprises: a retaining ring suitable for being associated with a neck of the container, the retaining ring extending about an axis; a closure element for opening or closing an opening defined by the neck of the container; a hinge structure interposed between the closure element and the retaining ring so as to allow the closure element to be rotated relative to the retaining ring.

The retaining ring and the closure element are separated by a separation line, which extends externally of the hinge structure.

The hinge structure comprises at least one connection band which connects the closure element to the retaining ring, the connection band being defined inside a recess provided in a side wall of the cap, the side wall extending about said axis.

An oxygen-shielding container lid according to the present invention comprises a high density polyethylene cap shell 1 having a skirt section 7 and a top plate section 5 provided with an inner ring 9 for intimate contact with an inner surface of a container mouth; and an in-shell molded body 3 provided in a portion of an inner surface of the top plate section which is surrounded with the inner ring 9. The in-shell molded body 3 is composed of a primary molded body 3a which has been formed by in-shell molding on the inner surface of the top plate section and which has an oxygen shielding function; and a secondary molded body 3b which has been formed on the primary molded body 3a by in-shell molding so as to cover the primary molded body 3a and to be fused and fixed to the inner surface of the top plate section at the peripheral edge of the primary molded body. A resin composition used for formation of the secondary molded body 3b contains linear low density polyethylene, and has a melt flow rate at 190 C. of 1 to 10 g/10 minutes, a density of 0.900 to 0.920 g/cm.sup.3, and a nominal tensile strain at break, as defined by JIS K-6922-2, of 400% or more.

The invention described herein relates broadly to closure assemblies, and methods of use and manufacture thereof. More particularly, certain embodiments relate to assemblies and methods for closing an opening defined by a spout provided on a flexible container utilising a capping member having a plugging portion and a substantially fracturable retaining skirt. Embodiments provide may an adequate seal for the contents contained within bags against the significant pressure placed upon the closure by the often weighty and voluminous contents of the packaging. Furthermore, the closure may be easily and comfortably removable by a user whilst managing the handling of the bag.

The present invention relates to a tethered screw plastic stopper, comprising a tamper shell positioned around the stopper. The tamper shell includes a retaining feature operable to cooperate with a top ring extending outwardly around a bottle neck. The stopper also includes a roof connected to the tamper shell through a hinge and separably connected to the tamper shell through a weakness line, wherein the tamper shell may be moved downwardly in rotation into an opened position.

A bottle-shaped can includes a cap having an excellent sealing ability but easy to be opened. A top section includes a leading end section as an upper end of a neck portion, a diametrically-largest section formed beneath the leading end section, a diametrically-shrunk section extending downwardly from the diametrically-largest section, and an outer circumferential wall section extending downwardly from the diametrically-shrunk section. The leading end section, the diametrically-largest section, and diametrically-shrunk section form a smooth curved surface. A curvature of the diametrically-largest section in a cross-section is zero or negative value, given that a curvature of the diametrically-shrunk section is positive value. A flexion section is formed between the diametrically-shrunk section and the outer circumferential wall section. The outer diameter of the outer circumferential wall section in which the curvature is zero or negative value is larger than an outer diameter of the flexion section.

A flow-limiting device for controlling the distribution of products, to be fitted into a neck of a container for such products comprises a flow-limiting part, and a sealing part wherein the flow-limiting part consists of an active material and comprises a dispensing opening. The sealing part is made of a polymer material different to the material of the flow-limiting part. The sealing part is adapted to form a moisture-tight seal with the neck of the container.

A bottle cap includes a body and a security ring. The body has multiple breakable bridge portions located along the periphery of the body and connected to the security ring. Two non-breakable plates are connected between the body and the security ring. Each of the non-breakable plates includes multiple turning positions and multiple angles. When the multiple breakable bridge portions are broken, the non-breakable plates are still connected to the security ring. The non-breakable plates are extendable so that the body can be pulled away from the security ring for a distance.