Preform for plastics material bottles or wide-necked vessels
AssigneeAlpla Werke Alwin Lehner GmbH & Co. KG
InventorChristian Dornbach
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Abstract
A preform for manufacturing plastics material bottles or wide-necked vessels is described, having a rigid, substantially elongate, frustoconical body portion that is closed at one of its longitudinal ends by a dome-shaped end portion and at its opposite longitudinal end adjoins via a preform collar a neck portion provided with a pouring opening. The preform possesses in the body portion an external diameter that is reduced from the preform collar to the end portion. The body portion has a wall thickness which changes over its longitudinal extension substantially constantly by up to +2 mm. For this purpose, it possesses an internal diameter which decreases substantially constantly from a transition to the preform collar up to a transition to the dome-shaped end portion.
Claims15
A preform for manufacturing plastics material bottles or wide-necked vessels, comprising:
- a rigid, substantially elongate, frustoconical body portion that is closed at one of its longitudinal ends by a dome-shaped end portion and at its opposite longitudinal end adjoins, via a preform collar, a neck portion provided with a pouring opening and has an external diameter which is reduced from the preform collar to the end portion;
- the body portion having a wall thickness that changes over its longitudinal extension substantially constantly by up to ±2 mm, and has an internal diameter that decreases substantially constantly from a transition to the preform collar up to a transition to the dome-shaped end portion.
Dependencies are inferred from the claim text.