| 摘要 |
A synthetic resin bottle having superior sealability between the mouth and the plastic cap. It has a thermally crystallized mouth (2) formed with a male thread (3). It also has a top plate (7), a cylindrical portion (8) having a female thread (9), a side seal (10), a cap liner (11), and a plastic cap (6) to be threadedly fitted on the mouth (2). The mouth (2) has a top plate abutment (15) abutting against the top plate (7) through the cap liner (11), and a side seal abutment (16) abutting against the side seal (10) through the cap liner (11). The side seal abutment (16) has an annular projection (17), the latter having a substantially semicircular cross-sectional contour, connecting to the top plate abutment (15) through a curved surface (18) having the cross-sectional contour, and pressed against the cap liner (11) at its portion extending from the end of the side seal (10) to the top plate (7). The arcuate cross-sectional contour has a radius within a range of 0.4-0.8 mm. The annular projection (17) is formed to project within a range of 0.03-0.2 mm on one side. |
