Preform neck crystallization method

Patent metadata

Field	Value
Publication number	US-10899064-B2
Application number	US-201816151153-A
Country	US
Kind code	B2
Filing date	Oct 3, 2018
Priority date	May 28, 2010
Publication date	Jan 26, 2021
Grant date	Jan 26, 2021

Abstract

A wide-neck synthetic resin container has a neck, a body and a bottom. A top side of the neck is sealed by a cap. The neck includes a neck tubular section, an engagement section protruding outward therefrom and engaging the cap, and a flange protruding outward at the top side. The flange protrudes less than the engagement section. The neck's top side includes a first top side formed by the neck tubular section, and a second top side formed by the flange that is the same height level with the first top side and increases an area of the top side. The neck tubular section has a uniform thickness at an area immediately below the flange and an area where the engagement section is formed. A thickness of the flange is smaller than that of the neck tubular section, and the neck has been crystallized.

First claim

What is claimed is:

1. A method for transferring a preform that includes a neck, a body, and a bottom, the preform being adapted for blow molding, the neck including: a neck tubular section, an engagement section that is formed to protrude outward from the neck tubular section and being adapted to engage a cap, and a ring-shaped recess that is formed in the neck tubular section at a height position closer to the body than the engagement section,
the engagement section including N (N is an integer equal to or larger than 2) threads, the N threads being respectively provided in N segmented areas into which the neck tubular section is divided in a circumferential direction, and being respectively formed in the N segmented areas within a range of less than 360°/N,
each of the N threads extending from a start point that is positioned at a first height in an axial direction of the neck tubular section to an end point that is positioned at a second height in the axial direction of the neck tubular section so that each of the N threads slopes upward toward the top side of the neck, and
the first height of each start point of the N threads being located directly above the ring-shaped recess in the upright state,
the method comprising:
transferring the preform with a chuck member disposed in the ring-shaped recess in an upright state in which the neck faces upward in the axial direction of the neck tubular section,
wherein during the step of transferring, each said start point of the N threads functions as a stopper that prevents the chuck member from disengaging from the ring-shaped recess, thereby hindering displacement of the preform in the axial direction of the neck tubular section.

2. The method for transferring a preform as defined in claim 1 ,
the ring-shaped recess in the upright state including a horizontal surface that faces downward,
the chuck member transferring the preform while supporting the horizontal surface.

3. The method for transferring a preform as defined in claim 1 , wherein the preform has a top side relative to a bottom side of the preform remote from the top side, and the chuck member engages the neck below the top side of the preform.

4. The method for transferring a preform as defined in claim 1 , wherein the preform has a neck ring, and wherein the recess is located above the neck ring with respect to the bottom side of the preform.

Assignees

• Nissei Asb Machine Co Ltd

Inventors

• Tsuchiya Yoichi

Classifications

• B29C49/761 Primary

  Forming threads, e.g. shaping neck thread between blowing means and mould · CPC title

• B29C49/685

  Rotating the preform in relation to heating means · CPC title

• B29C49/6452

  by heating the neck · CPC title

• B29C35/0266

  Local curing (for repairing B29C73/34) · CPC title

• B29K2105/258

  Tubular · CPC title