| 摘要 |
PROBLEM TO BE SOLVED: To provide an extraction cap to be well fitted with a bottle with a double-layered structure comprising an outer layer which forms a regular outer shell and is squeezable and an inner layer forming a deformable inner bag. SOLUTION: The extraction cap comprises a cap body 21 having a threaded tube 26 standing inside an upper end of an assembling tube 22 to be threaded with a mouth 6 of a bottle body 1 and an extraction tube 30 connected inside the threaded tube 26, which is formed with an extraction port 31 inside the extraction tube 30 and a vent line 34 between the body 21 and the tube 26, respectively. The extraction cap also comprises a seal body 35 provided in the cap body 21 and has an opening 36 at the center and a vent hole 42 on a periphery respectively opened, an extraction valve 32 provided at an upper end of the opening 36, an intake valve 43 provided at a lower end of the vent line 34 and an upper cap 44 mounted on the threaded tube 26 for opening/closing the extraction tube 30. Squeezability of an outer layer 3 of the bottle body 1 is utilized to extract a content liquid, while attaining contractive deformation of an inner layer 4 and restoration to an original shape of the outer layer 3. |
