addition the curing unit 6 is adapted to be pivoted by means of the pivot joint 69 and can for the purpose of maintenance be pivoted outwards away from the carousel 3 shown more precisely in fig3 a and 3b the locking element 66 which is configured as a quick release lock is used for arresting the pivot joint 69 the figure additionally shows that the safety switch 67 is arranged in the area of the two legs interconnected by the pivot joint 69 and detects a pivoting movement of the curing unit 6 the curing unit 6 is thus automatically deactivated during maintenance for reasons of safety of the operating staff furthermore the figure shows that the curing unit 6 comprises the shielding element 62 which cooperates with the access opening 71 of the shielding enclosure 7 thus respective substantially closed chambers are formed when the container reception means 4 move past the curing unit 6 said chambers preventing an escape of light the shielding element 62 has an umbrella like configuration and comprises the wings 62 a and 62 c which are formed cylindrically largely along the outer circumference of the carousel 3 when seen in the conveying direction as well as the two boundary elements 62 b and 62 d formed at the top and at the bottom the two wings 62 a and 62 c project into the adjoining container reception means 4 and the shielding enclosures 7 associated therewith the shielding element 62 exhibits a gap towards the edges 72 of the shielding enclosure 7 said gap guaranteeing that the.