Patent ID: 6689435
Filing Date: 2004-02-10
Classification: B29C,B29L,B62D,Y10T

Abstract:
An integrally formed hollow blow molded article made of thermoplastic resin, comprising:a first wall and a second wall confronting across a spacing, an integral rib between said first wall and said second wall, wherein said integral rib comprises a flat rib projecting from said second wall to said first wall, said flat rib comprising a first thermoplastic wall surface extending from said second wall and a second thermoplastic wall surface extending from said second wall, said first and second wall surfaces fused so as to form a substantially unitary thermoplastic rib, disposed substantially perpendicular to said second wall, said flat rib having first and second side ends, and a pair of hollow ribs, said hollow ribs integrally disposed along said first and second side ends of said flat rib, said hollow ribs extending from said second wall to said first wall, wherein-said flat rib and said hollow ribs are fused to an inner side of said first wall.