Gas-proof duct device for attachment to fermentation container, has seal inserted into reinforcing seam and lying cylindrically around internal cylinder, and external cylinder exhibiting fastening device to fasten to container

摘要

The device has a reinforcing seam (3) formed at an upper part of an external cylinder (1). A seal (5) is form-fitly inserted in the reinforcing seam, and lies cylindrically around an internal cylinder (8). The external cylinder exhibits a fastening device (2) to fasten to a fermentation container. The external cylinder comprises a circular collar (4) that exhibits recesses, where the internal cylinder is fixed in the recesses. A gasket is provided between the device and the external cylinder, and the internal cylinder exhibits a rope hoist.