English to French Tech/Engineering Patents (in a patent) VACUUM BASE FOR A CONTAINER

The thermal processing of an oriented PET container, which is known as heat setting, typically includes blow molding a PET preform against a mold heated to a température of approximately 120°C - 130^0 (approximately 248°F - 266°F), and holding the blown container against the heated mold for approximately three (3) seconds. Manufacturers of PET juice bottles, which must be hot-filled at approximately 85°C (185°F), currently use heat setting to produce PET bottles having an overall crystallinity in the range of approximately 25% - 35%.

The base portion is movable from an as-blown position to an expanded position and from the expanded position to a retracted position.

the secondary standing ring (124) is one of closer to or further from the finish (16) in the retracted position (E1-E2) than when in the as-blown position (C).

in the as-blown position (C) the secondary standing ring (124) is recessed within the container (10), and/or wherein in the expanded position (D), the secondary standing ring (124) protrudes outward beyond the primary standing ring (110) and a base end (46) of the container.