Back to results
US 4,047,874 AGranted
Apparatus for the preparation of parisons
OwnerEmery I. Valyiinventor
Life of this patent
Estimating the term…
Abstract
Method and apparatus for the preparation of oriented hollow objects of moldable organic plastic material by providing a parison on a first blow core, expanding said parison into an intermediate shape, as by pre-expanding it, transferring said pre-expanded parison to a second blow core, finally extending and expanding said parison to form said hollow object in finished shape.
Claims10
An apparatus for the preparation of parisons comprised of more than one layer of moldable organic plastic material which comprises:
- a dispenser containing a quantity of parison liners;
- a core having an axis and being in spaced relation to said dispenser, and further being operable to receive a parison liner from said dispenser;
- a parison die in axial alignment with said core and engageable therewith, said parison die being operable to inject plastic around said core and liner;
- and means for conveying a parison liner from said dispenser into axial alignment with said core and said parison die, wherein said core is moved along its axis to receive said parison liner from said means then to engage said parison die by directionally uninterrupted relative axial movement, and means to blow mold the composite liner and injection molded layer.
1 more element
Dependencies are inferred from the claim text.