| 摘要 |
<p>A bellows dispenser (10) comprising, a plunger (11) telescopically mounted on a contaienr closure (12), and a bellows (21) defining a pump chamber (22), is provided with a screw-thread (46) on the plunger body to engage with a mating screw-thread (47) on the closure (12) to lock the plunger down in a non-use position during shipping and storage. During plunger lock down a bearing member (45) on the plunger (11) compresses the bellows (21) against a part of the closure (12) to close a container vent opening (44) for avoiding any leakage in such non-use position. <IMAGE></p> |
