| US 7,552,833 B2 | ||
| Synthetic resin container having improved shape stability | ||
| Naoki Tsutsui, Tokyo (Japan); Shoji Tanabe, Tokyo (Japan); and Hiromichi Saito, Tokyo (Japan) | ||
| Assigned to Yoshino Kogyosha Co., Ltd., Tokyo (Japan) | ||
| Appl. No. 10/490,258 PCT Filed Sep. 26, 2002, PCT No. PCT/JP02/09976 § 371(c)(1), (2), (4) Date Oct. 29, 2004, PCT Pub. No. WO03/029087, PCT Pub. Date Apr. 10, 2003. |
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| Claims priority of application No. 2001-295405 (JP), filed on Sep. 27, 2001; application No. 2001-295930 (JP), filed on Sep. 27, 2001; and application No. 2001-297405 (JP), filed on Sep. 27, 2001. | ||
| Prior Publication US 2005/0045645 A1, Mar. 03, 2005 | ||
| Int. Cl. B65D 1/02 (2006.01); B65D 1/46 (2006.01) | ||
| U.S. Cl. 215—381 [215/382; 220/669; 220/675] | 12 Claims |
| 4. A synthetic resin container obtained by a biaxial-stretching blow molding, comprising:
a main body portion provided with reinforcing lateral ribs each having a concave portion which is flush at a first position
with a surface of said container, and forms a slight step relative to said surface of said container at a second position,
wherein:
said main body portion has a quadrilateral cross-section including at least four locations around said main body portion,
each location being a pillar comprising longitudinally elongated nonplanar surfaces, respectively, extending along a main
axis of said container,
each of said lateral ribs has a length such that the opposite ends of the lateral rib are short of the associated pillars,
respectively, and
said main body portion is provided with longitudinal ribs located between said lateral ribs and adjacent to said pillars.
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