Claims
- 1. 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.
- 2. A container according to claim 1, wherein a plurality of projections and recessions, arranged alternatively in series and undulatory in sectional shape, extend from the center of the bottom wall to the outer periphery of the bottom wall, a difference in level between said projections and recessions gradually increasing as the distance from the center of the bottom wall increases, the foot portions being defined by a plurality of said projections.
- 3. A container according to claim 2, wherein said rigid ribs are formed at bends of each recession and projection.
- 4. 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.
Priority Claims (6)
Number |
Date |
Country |
Kind |
53-137419 |
Nov 1978 |
JPX |
|
53-145689 |
Nov 1978 |
JPX |
|
53-145690 |
Nov 1978 |
JPX |
|
53-149871 |
Dec 1978 |
JPX |
|
53-153313 |
Dec 1978 |
JPX |
|
53-158253 |
Dec 1978 |
JPX |
|
Parent Case Info
This is a division of application Ser. No. 06/677,333 filed Dec. 4, 1984, now U.S. Pat. No. 4,997,692 which in turn is a continuation of appln. Ser. No. 06/343,860 filed Jan. 29, 1982, now abandoned which in turn is a divisional of appln. Ser. No. 06/089,537 filed Oct. 29, 1979 now abandoned.
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Divisions (2)
|
Number |
Date |
Country |
Parent |
677333 |
Dec 1984 |
|
Parent |
89537 |
Oct 1979 |
|
Continuations (1)
|
Number |
Date |
Country |
Parent |
343860 |
Jan 1982 |
|