| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a preform which is prevented from falling while being conveyed in a production process and makes it difficult for a ring to fall from a spout. <P>SOLUTION: The preform 10 has the spout 11, a reform body 12, and a flange part 13 formed between the spout 11 and the preform body 12. A male screw part 14 to be engaged with a female screw part 25 in the inner surface of a cap 20 is formed on the periphery of the spout 11. At positions between the male screw part 14 and the flange part 13 on the periphery of the spout 11, a plurality of ratchet claws 15 which are engaged in the circumference direction with the projection 28 on the inner surface of the ring 22 of a cap 20 and break off the ring 22 from a cap body 21 are installed in the circumference direction at prescribed intervals. Between the ratchet claw 15 and the flange part 13 on the periphery of the spout 11, a circumference groove part 17 retreating inward from a domain between the ratchet claws 15 are installed over the whole circumference of the spout 11. <P>COPYRIGHT: (C)2010,JPO&INPIT</p> |
