Patent ID: 8551385
Filing Date: 2013-10-08
Classification: B29C,B29L,B65D

Abstract:
1. A method of molding a resin over a hollow molded body made of a resin including a closed-bottom cylindrical main body and a cylindrical open neck portion, said open neck portion including a helical ridge portion formed on an outer circumferential surface thereof and divided into a plurality of helical segments by a slit extending in an axial direction of said open neck portion, said helical segments including a longer helical segment and a shorter helical segment, wherein the longer helical segment is longer in a circumferential direction of said open neck portion than the shorter helical segment, said method including overmolding a resin sheathing body over an outer surface of said main body, comprising: retaining said hollow molded body by engaging said slit with an engagement piece; and overmolding a molten resin over said hollow molded body thus retained; wherein said retaining said hollow molded body includes engaging said slit with said engagement piece such that a clearance “between an end portion of said longer helical segment and said engagement piece is larger than a clearance between an end portion of said shorter helical segment and said engagement piece”.