A fabric and elastomeric material (referred to as a fabric trilayer) combined with a sealant may be applied in such a fashion so as to eliminate or minimize air entrapment in an elastomeric composite structure that forms a seal-sealing volume. The performance of the self-sealing volume is dramatically improved with this minimizing of air entrapment. Surprisingly and unexpectedly, this construction approach may be accomplished without significantly adding to the weight or thickness of the volume and without affecting the outer dimension of the self-sealing volume. Thus, a method and system for forming a self-sealing volume are described. The system includes an elastomeric composite structure comprising at least one layer of an elastomeric material derived from a neat (no solvent) elastomeric material that does not substantially react at room temperature.

There is provided a blow molding device, in which the blow molding device includes an injection molding part injection-molding a preform having a main body portion, a temperature adjustment part adjusting a temperature of the preform, and a blow molding part blow-molding the preform, and the temperature adjustment part includes a conditioning core mold that is in contact with an inner surface of the main body portion and a conditioning cavity mold that is in contact with an outer surface of the main body portion, and compresses and deforms the main body portion of the preform into a desired shape with the main body portion sandwiched between the conditioning core mold and the conditioning cavity mold.

Disclosed is an ethylene polymer having a viscosity-average molecular weight (Mv) of 3,000,000 or more and 15,000,000 or less.

Apparatus for producing plastic material preforms, includes at least two preform manufacturing devices configured for producing the plastic material preforms from a plastic material, wherein the preform manufacturing devices each having preform transport devices. The apparatus includes a main transport device which is configured for transporting the plastic material preforms produced by the preform manufacturing devices and transported by the preform transport devices continuously along a predetermined main transport path, wherein the plastic material preforms are transferred to the main transport device by the production devices after their production.

This resin-made container is provided with: a neck portion having a content inlet-outlet portion; a lateral surface portion connected to the neck portion; and a bottom portion that is disposed on the side opposite to the neck portion and that is connected to the lateral surface portion. The resin-made container is produced by a stretch blow molding process. The bottom portion has formed therein a bulge section that protrudes downward in the vertical direction. The bulge section is disposed in an eccentric region, of the bottom portion, positioned outside a region demarcated by perpendicularly projecting an opening plane of the inlet-outlet portion of the neck portion.

The invention relates to a mold for molding a hollow body from a preform, the mold defining a molding cavity having the shape of the a hollow body to be molded. The mold including a first part and a second part movable relative to each other between an opened configuration, wherein the preform can be loaded inside the molding cavity, and a closed configuration, wherein the molding cavity is formed. The mold further including a locking element arranged to maintain the mold in its closed configuration in a locked position of the mold. The locking element having at least a sleeve portion arranged around a portion of the first and second parts in the closed configuration such that the sleeve portion surrounds the portion of the first and second parts and prevents the mold from moving towards its open configuration in the locked position of the mold.

The invention relates to a mold for molding a hollow body from a preform, the mold defining a molding cavity having the shape of the a hollow body to be molded. The mold including a first part and a second part movable relative to each other between an opened configuration, wherein the preform can be loaded inside the molding cavity, and a closed configuration, wherein the molding cavity is formed. The mold further including a locking element arranged to maintain the mold in its closed configuration in a locked position of the mold. The locking element having at least a sleeve portion arranged around a portion of the first and second parts in the closed configuration such that the sleeve portion surrounds the portion of the first and second parts and prevents the mold from moving towards its open configuration in the locked position of the mold.

The invention concerns a machine for manufacturing plastic items comprising, in series, along the manufacturing line: a rotatable roll (1) of plastic material in the form of at least one strip; a shaper (4) for forming tubes from said strips and means (5) for longitudinally welding said tubes; means (6) for cutting the tubes transversely, arranged so as to form tube sections (10); means for transferring and depositing said sections in holding and moving means; an oven (8) in which said tube sections move; a first turret (9) supporting moulds; means for processing the tube sections in the first turret; means for blowing a pressurised fluid into the moulds; a second turret (14) for discharging the bottles from said moulds.

The invention concerns a machine for manufacturing plastic items comprising, in series, along the manufacturing line: a rotatable roll (1) of plastic material in the form of at least one strip; a shaper (4) for forming tubes from said strips and means (5) for longitudinally welding said tubes; means (6) for cutting the tubes transversely, arranged so as to form tube sections (10); means for transferring and depositing said sections in holding and moving means; an oven (8) in which said tube sections move; a first turret (9) supporting moulds; means for processing the tube sections in the first turret; means for blowing a pressurised fluid into the moulds; a second turret (14) for discharging the bottles from said moulds.

A blow-molded plastic structure has a hollow interior portion formed during a blow-molding process, and includes first and second outer portions that are spaced apart from each other, with the hollow interior portion disposed there between. The structure includes a pattern of structural stiffening features that are integrally formed in the second outer portion. The pattern of structural stiffening features includes a plurality of tripodal depressions disposed in rows and columns and a plurality of convex regions disposed in rows and columns between the plurality of tripodal depressions. Each convex region has a maximum height between the first and second outer portions. Each of the tripodal depressions extends into the hollow interior portion, includes three indentations disposed adjacent the first outer portion, and includes an island spaced away from the first outer portion. The island has three sides, each of which is disposed adjacent one of the three indentations.