Patent ID: 6749780
Filing Date: 2004-06-15
Classification: B29B,B29C,B29K,B29L,B65D,Y10T

Abstract:
A method of making a multi-layer blow-molded plastic container (10, 110) having an externally-threaded wide-mouth finish (20, 120) for receiving a removable closure, comprising the steps of:obtaining a tubular preform (32) having a container body forming portion (54) which includes a closed bottom end (46) of said preform (32), a moil forming portion (52) which includes an open top end (48) of said preform (32), and a blown finish forming portion (56) located between said container body forming portion (54) and said moil forming portion (52), said body forming portion (54) of said preform (32) having a multi-layer structure including at least one layer (22) of a secondary material located between inner and outer layers (24, 26) of a primary container material, and said moil forming portion (52) of said preform (32) having a mono-layer structure consisting essentially of said primary container material; preheating said preform (32); disposing said preheated preform (32) into a mold cavity (34) having a surface (60) with a container body forming region (62), a blown finish forming region (64) superadjacent said body forming region (62), and a moil forming region (66) superadjacent said blown finish forming region (64); distending said preheated preform (32) against said surface (60) of said mold cavity (34) to form an intermediate container article (36) including a multi-layer blow-molded plastic container (10) having a blown externally-threaded wide-mouth finish (20) and a moil (38) extending upwardly from said blown finish (20); and severing said moil (38) from said intermediate container article (36) at a location that provides a severed moil (38) consisting essentially of said primary container material.