Device for providing a crossover point

A device (100) for providing a passage between a first area (1) and a second area (2) which is hermetically delimited from the first area (1) by means of a wall (10), wherein the device (100) comprises the following:

• an airlock chamber (12) which can be inserted into an opening (11) provided in the wall (10) which has a first opening (13) forming a passage between the first area (1) and the airlock chamber (12) and which has a second opening (14) forming a passage between the second area (2) and the airlock chamber (12);
• and
• a revolving element (15) configured as one of a conveyor belt and a drum wall for separating the first opening (13) from the second opening (14) having at least one passage opening (15.1;
• 19.1;
• 15.2, 19.2), the revolving element movable relative to the first opening and the second opening (13, 14) of the airlock chamber (12) so as to be able to alternatingly realize at least one first state in which the at least one passage opening (15.1;
• 19;
• 19.1) is substantially aligned with the first opening (13) of the airlock chamber (12) and allows entry from the first area (1) into the airlock chamber (12) and the revolving element (15) essentially completely covers the second opening (14) of the airlock chamber (12), and a second state in which the at least one passage opening (15.1;
• 19.1;
• 15.2, 19.2) or at least a further passage opening (15.1, 19.1, 15.2, 19.2) is substantially aligned with the second opening (14) of the airlock chamber (12) and allows entry from the second area (2) into the airlock chamber (12) and the revolving element (15) essentially completely covers the first opening (13) of the airlock chamber (12);
• wherein the revolving element (15) comprises two passage openings (15.1, 15.2) which are arranged in relation to their relative position to one another such that in a state in which a first one of the passage openings (15.1) is aligned with one of the first opening and the second opening (13, 14) of the airlock chamber (12), a second one of the passage openings (15.2) is not aligned with either of the first opening and the second opening (13, 14) of the airlock chamber (12), and in a state in which the second one of the passage openings (15.2) is aligned with one of the first opening and the second opening (13, 14) of the airlock chamber (12), the first one of the passage openings (15.1) is not aligned with either of the first opening and the second opening (13, 14) of the airlock chamber (12).