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US 5,573,791 AGranted
Apparatus for forming a parison having multiple resin layers
OwnerPaul Marcusinventor
Life of this patent
Estimating the term…
Abstract
An apparatus forms multiple resin layered parisons that are cooled or blown into bottles. The individual resin layers are injection molded in sequence and the formed parisons are transferred to each cooling and molding station by an axially and laterally indexing platen.
Claims27
An apparatus for forming a parison having multiple resin layers comprising:
- a first parison layer injection molding station for forming a first parison layer of reduced thickness;
- a pair of second parison layer injection molding stations for forming a second parison layer of reduced thickness on a first parison layer with one of the second parison layer injection molding stations being on opposed sides of the first parison layer injection molding station;
- indexing means for moving a first of the first parison layer from the first parison layer injection molding station to one of the second parison layer injection molding stations and a second of the first parison layer to the other of the second parison layer injection molding stations, the second of the first parison layer being injection molded at the first parison layer injection molding station while the first of the first parison layers is at the one of the second parison layer injection molding stations for receiving a second parison layer thereon to form a first two layered parison.
Dependencies are inferred from the claim text.