| 摘要 |
The invention relates to apparatus 1 for releasably securing the lid 2 of a receptacle 3 for removal or replacement of the lid, the apparatus 1 comprising means 6 defining first and second vacuum chambers 5,7, the second vacuum chamber 7 being adapted to contact and secure a lid 2 when a pressure drop occurs in said second chamber 7, the arrangement being such that creating of a vacuum in the first chamber 5 acts on the defining means 6 to create a pressure drop in the second chamber 7 without fluid flow between the chambers, the pressure drop being sufficient to secure the lid 2 for removal of the lid from the receptacle.
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