Abstract: A twin station rewinder having a transfer roll and a pair of rewinding rolls alternately rewinds a succession of paper logs at a pair of rewinding stations from a continuously advancing web of paper. The logs are wound on cores supplied to the each rewinding station which are thereafter held by diameter control rolls which move away from their respective winding roll to control web tension and log diameter during the log building process. Built logs are successively received in one of two log deceleration receivers and delivered to a log discharge position where they are dumped to a log discharge conveyor. New cores are supplied by a core supply conveyor to one of two core holders, each of which is associated with one of the log deceleration receivers. Cores are transferred from the core holders to the rewinding stations by a pair of core insertion arms which are retractable to permit the log building process.