| 摘要 |
The dosage cap (1) is designed to be fitted onto a product container (7). The cap (1) has a dosage chamber (30) inside of which is mounted a sliding piston (24) which can move from a first position, in which the chamber (30) has a maximum volume, to a second position in which the chamber (30) has a minimum volume. The chamber (30) has an input passage (16,17), which is open when the piston (24) is in the first position and closed and sealed when the piston is in the second position. The piston (24) is connected to a closing part (50) which, in the pistons first position, closes and seals an output passage (15) in the chamber (30) and opens the passage (15) at the moment of closure of the input passages (16,17). The part (50) is displaced when the piston (24) moves between its two positions. |
