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US 4,846,656 AGranted
Apparatus for heat treatment of preform necks
AssigneeSidel
InventorsGerard Denis, Jean-Michel Rius
Life of this patent
Estimating the term…
Abstract
An apparatus for the heat treatment of the necks 1 of performs 2 includes a rotatable mandrel 3, which is inserted in and engaged with the neck of the preform to rotate it, a fixed protective skirt 4, and a heater 5 situated at the level of the neck. A sliding weight 28 is applied to the upper end of the neck during the heat treatment.
Claims12
An apparatus for the heat treatment of the neck (1) of a preform (2) made of a thermoplastic material such as polyethyleneterephthalate, comprising:
- a rotatably driven mandrel (3) having a vertical axis (X--X) and adapted to be inserted into and frictionally engaged with the neck of a preform, such that the mandrel and the preform rotate together about said axis, a skirt (4) positioned to surround a lower, body portion of the preform below the neck when the preform is frictionally engaged with the mandrel for rotation, and heating means (5) positioned adjacent the neck of the preform above said skirt when the preform is so engaged with the mandrel.
Dependencies are inferred from the claim text.