Abstract: Tray sealer, comprising a sealing station for sealing trays, an infeed belt for providing trays, an outfeed belt for transporting sealed trays away, a gripper device comprising a first gripper unit which is configured to pick up trays from the infeed belt and to position them for a sealing process within the sealing station, and comprising a second gripper unit which is configured to collect the trays sealed by way of the sealing station and to position them on the outfeed belt for being transported away, where the first gripper unit comprises a first carriage as well as a first gripper mounted thereon and the second gripper unit comprises a second carriage and a second gripper mounted thereon, a lifting mechanism for opening and closing the sealing station, as well as a control device for controlling a motion of the first carriage and the first gripper as well as for controlling a motion of the second carriage and the second gripper, where, during the opening of the lifting mechanism, the control device is c

Abstract: An activator composition having a) between 0.5% and 50% by weight of a catalyst K for crosslinking two-component adhesives which is liquid at 23° C., b) between 40% and 99.5% by weight of an organic solvent L, c) between 0% and 10% by weight of at least one silane S including at least one hydrolyzable silane group and preferably at least one functional group selected from mercapto, epoxy, amino, methacryloyl, vinyl and alkyl group. The activator composition is storage stable for at least one month. The activator composition is moreover active independently of the applied amount and may be applied in layers having a thickness such that the adhesive may be applied after not more than 30 seconds.