Abstract: A process of manipulating a closable carton with lid panels extending from walls of the carton and tabs received in slots formed in the lid panels to secure the lid panels to close the carton. The process has a step of moving a folding element transverse to each wall from which a lid extends to move the one or more lids into a position which closes the carton. The process has a step of lifting the closed carton past a non-return support and into engagement with another carton to provide a stack of closed cartons supported by the non-return support. The process has a step of the support then releasing a stack of closed cartons to a conveyor.