| 摘要 |
PROBLEM TO BE SOLVED: To provide a synthetic resin bottle in which the occurrence of sink in a mouth part is prevented in direct blow molding to raise sealing performance, and a plugging cap used for a normal PET bottle by biaxially oriented blow molding can be mounted.SOLUTION: A synthetic resin bottle is characterized as follows: the synthetic resin bottle comprises a cylindrical mouth part 3 fitted and mounted to a fitting groove 51 of a cap C by plugging; two or more projecting rings 7, 8 and one engaging ring 9 are annularly projected in parallel to an axial direction of the mouth part 3 in an outer circumference of the mouth part 3; the engaging ring 9 arranged downward from the two or more projecting rings 7, 8 are arranged in a position engaged with a reduced diameter projection 60 projected in the fitting groove 51 of the cap C; and a mouth part structure provided with annular grooves 12, 13 between the adjacent projecting rings 7, 8 and between the projecting ring 8 and the engaging ring 9 is provided.SELECTED DRAWING: Figure 2 |
