Synthetic resin thin-walled bottle and method of producing same
AssigneeYoshino Kogyosho Co., Ltd.
InventorYataro Yoshino
Life of this patent
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Abstract
This invention provides a synthetic resin thin-walled bottle, a tubular intermediate therefor and a method of producing a thin-walled bottle. The thin-walled bottle has ribs at least at its bottom portion, and the bottle bottom is raised up frusto-conically or has an undulatory shape. The tubular intermediate is first formed with ribs which become thin-walled protuberant ribs after blow molding. The thin-walled bottle is produced by blow-molding the ribbed tubular intermediate.
Claims4
A biaxially oriented synthetic resin thin-walled container made by blow molding an intermediate, comprising:
- a top-open neck portion;
- a closed bottom portion;
- a hollow cylindrical barrel body portion interconnecting said neck portion and said bottom portion;
- the bottom portion having a plurality of hollow foot portions bulging downwardly of the bottle, lower ends of the foot portions defining ground contacting surfaces;
- a plurality of solid rigid ribs being provided at least on an internal surface of a bottom wall of the bottom portion, and extending radially along an internal surface of the foot portions, said rigid ribs being a result of a plurality of ridges provided on internal surfaces of said intermediate prior to biaxial orientation.
A biaxially oriented synthetic resin thin-walled container made by blow molding an intermediate, comprising:
- a top-open neck portion;
- a closed bottom portion which is bulged hemispherically downward;
- a hollow cylindrical barrel body portion interconnecting said neck portion and said bottom portion;
- a plurality of solid rigid ribs being provided at least on an internal surface of a bottom wall of the bottom portion, and extending radially from the vicinity of the center of the bottom wall, said rigid ribs being the result of a plurality of ridges provided on internal surfaces of said intermediate prior to biaxial orientation.
Dependencies are inferred from the claim text.