Device for treating objects comprising: a) a treatment chamber, in which there is a wall with a first wall portion and a second wall portion, between which a gap extending in the wall is formed; b) an apparatus (16; 100), in particular a treatment apparatus or a conveying apparatus, which comprises at least one component (44; 104), which extends from an outside region outside the treatment chamber through the gap into the treatment chamber and which can be moved along the gap; c) a sealing arrangement, which seals the gap in the wall of the treatment chamber except for at least one through opening through which the at least one component (44; 104) extends and which follows a movement of the at least one component (44; 104) along the gap, wherein d) the sealing arrangement comprises: da) a first sealing element, which extends on the first wall portion along the gap and has a coupling edge which is remote from the first wall portion; db) a second sealing element, which extends on the second wall portion along the gap and has a coupling edge which is remote from the second wall portion and is complementary to the coupling edge of the first sealing element; e) the sealing arrangement is configured such that ea) the coupling edges (60, 66) are coupled to one another except for the through opening; eb) during the movement of the at least one component (44; 104), the coupling edges (60, 66) separate from one another before the through opening in the movement direction of the component (44; 104) and couple to one another after the through opening in the movement direction, characterized in that f) the sealing arrangement comprises a cover means, with which the coupling edges (60, 66) are protected in the treatment chamber; g) the cover means comprises a cover strip (88, 90) on each sealing element (56, 62), which cover strips (88, 90) extend over the associated coupling edge (60, 66) in each case and are arranged and dimensioned such that they overlap in the region of the mutually coupled coupling edges (60, 66). a) a treatment chamber, in which there is a wall with a first wall portion and a second wall portion, between which a gap extending in the wall is formed; b) an apparatus (16; 100), in particular a treatment apparatus or a conveying apparatus, which comprises at least one component (44; 104), which extends from an outside region outside the treatment chamber through the gap into the treatment chamber and which can be moved along the gap; c) a sealing arrangement, which seals the gap in the wall of the treatment chamber except for at least one through opening through which the at least one component (44; 104) extends and which follows a movement of the at least one component (44; 104) along the gap, wherein d) the sealing arrangement comprises: da) a first sealing element, which extends on the first wall portion along the gap and has a coupling edge which is remote from the first wall portion; db) a second sealing element, which extends on the second wall portion along the gap and has a coupling edge which is remote from the second wall portion and is complementary to the coupling edge of the first sealing element; da) a first sealing element, which extends on the first wall portion along the gap and has a coupling edge which is remote from the first wall portion; db) a second sealing element, which extends on the second wall portion along the gap and has a coupling edge which is remote from the second wall portion and is complementary to the coupling edge of the first sealing element; e) the sealing arrangement is configured such that ea) the coupling edges (60, 66) are coupled to one another except for the through opening; eb) during the movement of the at least one component (44; 104), the coupling edges (60, 66) separate from one another before the through opening in the movement direction of the component (44; 104) and couple to one another after the through opening in the movement direction, characterized in that ea) the coupling edges (60, 66) are coupled to one another except for the through opening; eb) during the movement of the at least one component (44; 104), the coupling edges (60, 66) separate from one another before the through opening in the movement direction of the component (44; 104) and couple to one another after the through opening in the movement direction, f) the sealing arrangement comprises a cover means, with which the coupling edges (60, 66) are protected in the treatment chamber; g) the cover means comprises a cover strip (88, 90) on each sealing element (56, 62), which cover strips (88, 90) extend over the associated coupling edge (60, 66) in each case and are arranged and dimensioned such that they overlap in the region of the mutually coupled coupling edges (60, 66).