| 摘要 |
Method and device for sealing a continuous product, such as an electrical cable, passing between zones at different pressures during manufacture wherein a liquid such as water, is used to effect sealing, and turbulence is created in the liquid to reduce the dimensions of the seal, e.g. by passing a suitable gas or gas mixture, such as air, through the liquid. The device may be a tube through which the product passes and in which the liquid forms a seal between the product and the tube wall. The gas may pass through suitably directed holes in the tube wall into the liquid. The gas may be directed against the flow of the liquid or may impart a spiral motion to the liquid. The spiral motion may also be produced e.g. by means of spring inserts in the tube.
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