Patent ID: 6841117
Filing Date: 2005-01-11
Classification: B29C,B29K,B29L,B65D,Y10T

Abstract:
1. A method for forming a blow molded PET plastic container having an externally-threaded wide mouth finish produced by a process comprising the steps of: disposing a preheated preform in a mold cavity having a surface with a container body forming region comprising a predetermined wall thickness for substantially its entire axial extent, a thread forming region comprising a wall thickness, an outer diameter, and an axial extent which are less than a wall thickness, an outer diameter, and an axial extent of said container body forming region, wherein said thread forming region is above and connected to said body forming region, and a moil forming region comprising an inner diameter that tapers inwardly toward said thread forming region, wherein said moil forming region is above and connected to said thread forming region, said mold cavity having at least one recess extending radially inwardly of said mold cavity surface immediately superadjacent a thread forming surface of said mold cavity, said preform having an interior surface and a preheated exterior surface in said thread forming region thereof; distending said pretreated preform against said mold surface to form an intermediate container article having a moil region with a flange region extending radially outward of a threaded region, wherein said threaded region is connected to said moil region; cooling an interior surface of said thread region; and severing said moil region radially between said radially-extending flange region and said threaded region to produce a wide mouth container.