US 2004/0166265 A1 · CONTAINER PREFORM ASSEMBLY AND METHOD OF MANUFACTURE

Abstract

A preform assembly for blow molding a container includes a molded plastic preform having a body and a neck with an external surface. The neck includes a plurality of spaced lands molded integrally with the neck and the body and defining the external surface of the neck, and a plurality of open spaces between the lands. A plastic finish ring is molded separately from the preform and is externally secured over the lands. The open spaces between the lands reduce heat transfer between the preform neck and the finish ring. In two exemplary embodiments of the invention, the lands include either spaced axial ribs or spaced circumferential ribs on the preform neck, and the open spaces include either spaced axial channels or spaced circumferential channels between the ribs.

Claims18

Dependent claims

A preform assembly for blow molding a container, which includes:

a molded plastic preform having a body and a neck with an external surface,
a plastic finish ring molded separately from said preform and having an internal surface,
one or both of said internal and external surfaces having a plurality of spaced lands defining said surfaces, and a plurality of open spaces between said lands,
said finish ring being externally secured over said neck with said external and internal surfaces in engagement, said open spaces between said lands reducing heat transfer between said neck and said ring.

1 more element

Dependencies are inferred from the claim text.

Container preform assembly and method of manufacture

Life of this patent

Container preform assembly and method of manufacture

Life of this patent

Abstract

Claims18