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US 11,220,023 B2Granted
Preform and method for producing container
AssigneeNissei Asb Machine Co., Ltd.
InventorsRyo Kawamura, Manabu Ogihara
Life of this patent
Estimating the term…
Abstract
A preform 20 comprises a neck portion 22 having an opening 21, a cylindrical barrel portion 23, and a bottom portion 24 larger in diameter than the barrel portion 23, and has a corner portion 25 at a boundary between the barrel portion 23 and the bottom portion 24.
Claims7
A preform for forming a container having a bottom surface section with a larger wall thickness than a wall thickness of a barrel, the preform comprising:
- an opening neck portion,
- a cylindrical barrel portion, and
- a bottom portion having a flat upper surface, the bottom portion being larger in diameter than the barrel portion, and the bottom portion having a corner portion at a boundary between the barrel portion and the bottom portion;
- wherein, in a cross-section passing through an axis line of the preform, the corner portion is defined by:
- a first straight line which configures the barrel portion and is substantially parallel to the axis line;
- and
- a second straight line which configures the flat upper surface of the bottom portion, and
- wherein an angle defined by the first line and the second line is a right angle or an acute angle.
5 more elements
A method for producing a container having a bottom surface section with a larger wall thickness than a wall thickness of a barrel, comprising:
- forming a preform by injection molding, the preform including an opening neck portion, a cylindrical barrel portion, and a bottom portion having a flat upper surface, the bottom portion being larger in diameter than the barrel portion, and the bottom portion having a corner portion at a boundary between the barrel portion and the bottom portion;
- controlling a temperature of the preform by bringing at least the bottom portion of the preform into intimate contact with a temperature control mold for cooling;
- and
- forming the container by blow-molding the temperature-controlled preform;
- wherein, in a cross-section passing through an axis line of the preform, the corner portion is defined by:
- a first straight line which configures the barrel portion and is substantially parallel to the axis line;
- and
- a second straight line which configures the flat upper surface of the bottom portion, and
- wherein an angle defined by the first line and the second line is a right angle or an acute angle.
6 more elements
Dependencies are inferred from the claim text.