| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a synthetic resin bottle capable of facilitating the reversing of a reversed portion, having high strength against cracks or slits at a hinge and positively maintaining either the recessed state or the protruding state of the reversed portion, and a synthetic resin bottle manufacturing method. <P>SOLUTION: A bottom 4 for closing the lower part of a barrel 3 is provided with legs 7 having a ground contact surface and a reversed part 8 continuously arranged at inner peripheral edges of the legs 7. The reversed part 8 has with symmetrical slant portions 11 stretched together with the barrel 3 and the legs 7 and reversed in a recess or a protrusion toward the inside of the barrel 3 and the outside of the barrel 3, and a bottom central part 13 formed at a region enclosed by the slant portions 11. A pair of biaxially oriented hinges 10, 12 becoming the hinges at the time of reversing are arranged along each of outer circumferential edges and inner circumferential edges of the slant portions 11. <P>COPYRIGHT: (C)2008,JPO&INPIT</p> |
