Apparatus, used to cool band-shaped substrate in vacuum, comprises cooling body having convex cooling surface as a perimeter, unit for guiding substrate such that substrate partially encircles cooling surface at contact area, and openings

The apparatus comprises a cooling body (31) having a convex cooling surface (32) as a perimeter, a unit for guiding a band-shaped substrate such that the substrate partially encircles the convex cooling surface at a contact area, and openings distributed over the contact area of the cooling surface and extend through the cooling surface into a cooling body. A first subset of openings extends inside a first channel in the cooling body, which opens end face of the cooling body, and a second subset of the openings extends into a second channel within the cooling body. The apparatus comprises a cooling body (31) having a convex cooling surface (32) as a perimeter, a unit for guiding a band-shaped substrate such that the substrate partially encircles the convex cooling surface at a contact area, and openings distributed over the contact area of the cooling surface and extend through the cooling surface into a cooling body. A first subset of openings extends inside a first channel in the cooling body, which opens end face of the cooling body, a second subset of the openings extends into a second channel within the cooling body, which opens the end face of the cooling body, and a third subset of the openings extends into a third channel within the cooling body, which opens one end face of the cooling body. The first subset of openings and the third subset of the openings are arranged in a direction of movement of the substrate. The apparatus further comprises a first unit for providing a fluid such that the fluid flows through the first channel to the cooling body, and a second unit for pumping the fluid from the second channel and the third channel. The convex cooling surface is part of a fixed mold shoulder. The cooling body is designed as cylindrical cooling roll or as cylindrical cooling drum. A stationary sliding member (36) is arranged on an end face the cylindrical cooling body, is rotated about a cylindrical axis of the cylindrical cooling body, and comprises a connecting unit for supplying the fluid into the first channel, and a connecting unit for pumping the fluid from the second channel and the third channel. The sliding member further comprises a sealing element, which is firmly connected with the sliding member on a side. The sealing element comprises a sliding mechanical contact with a front end of the cooling body, and plastics. The apparatus further comprises a mechanical spring element, which presses the sliding member against the front end of t