Bottle neck structure and a manufacturing method therefor

A bottle, having a bottle neck structure, comprising:

• a resin core member:
• said resin core member having a cylindrical body;
• said cylindrical body having through-holes therein;
• a bottle resin layer covering substantially all of an inside surface of said resin core member;
• said bottle resin layer passing through said through-holes and covering a portion of an outside surface of said resin core member;
• said portion of an outside surface having an outside shape adapted for affixing a cap thereto;
• said resin core member divisable into hypothetical segments;
• and
• an axis of each said through-hole is parallel with a line, said line bisecting an arc created by each of said hypothetical segments and intersecting a center of said resin core member.

A bottle neck structure of a synthetic resin bottle comprising:

• a preformed resin core member made of a thermally resistant resin;
• said preformed resin core member includes a cylindrical body making a core wall of said bottle neck structure;
• a flange radially projected from an outside surface at a lower end of said cylindrical body;
• a projection radially extended from said outside surface of said cylindrical body above said flange;
• an inner bottle resin layer formed of a bottle resin on said inside surface of said cylindrical body;
• a plurality of through-holes formed above said projection in said cylindrical body;
• an outer bottle resin layer formed on said outside surface above said projection;
• said outer bottle resin layer contiguous through said through holes with said inner bottle resin layer whereby said cylindrical body is substantially embedded in said bottle resin;
• said outer bottle resin layer forming a region for affixing a cap;
• an outer surface portion of said cylindrical body between said flange and said projection being an exposed surface free of bottle resin;
• and
• said through-holes having sizes and locations for permitting bottle resin to pass uniformly from said inside surface of said cylindrical body to said outside surface of said cylindrical body through said through-holes.

A bottle with a bottle neck structure comprising:

• a resin core member having a cylindrical body;
• said cylindrical body having a circumferential wall;
• said cylindrical body being a tube;
• a flange constituting a support ring on said bottle neck structure, said flange having at least one exposed surface portion of an outside surface adapted to be contacted by a mold;
• a plurality of through-holes in said circumferential wall of said cylindrical body being at least 1 mm in diameter;
• an inner bottle resin layer on an inside surface of said resin core member;
• said inner bottle resin layer being at least 0.5 mm in thickness;
• said resin core member having a downward-facing inside edge, said downward-facing inside edge having one of an edge radius and a taper;
• an outer resin layer created by bottle resin passing through said through-holes;
• said outer resin layer including a covered portion of said cylindrical body;
• a drum body of said bottle resin;
• and
• said drum body being contiguous with at least one of said inner bottle resin layer and said outer resin layer.