An aggregate link system is provided with cooperating link aggregation member devices defining a link aggregation. The organic light emitting device comprises a first electrode, organic material layer comprising a light emitting layer, and a second electrode. In a case where the confirmation section determines that the first identification information item is backed up in the backup memory, a storage process section updates the first identification information item stored in a communication section-side memory with a second identification information item stored in the backup memory. This allows a sufficient volume of steam to be delivered to the web to thereby raise its moisture content to a desired level to thus achieve optimized calendering of the web.