Transfer roller for transferring adhesive coating of correct format has peripheral surface with pins or rods radially movable between retracted and deployed positions by electromagnets

摘要

The transfer roller has a peripheral surface with a close pattern of radially movable pins or rods (14,15) that can be moved between a retracted inactive position and an active deployed position by individual, separately driven electromagnets. The pins are activated immediately before running into contact with the adhesive roller.