Can decorator apparatus and method

摘要

Apparatus for decorating a can body. The apparatus comprises a can body conveying mechanism (1) for conveying can bodies (2) to a printing zone (3), a blanket wheel (4) comprising a plurality of blanket segments (6) and, affixed to each blanket segment, a blanket (7) having a printing surface, the blanket wheel being configured to bring blanket printing surfaces into contact with can bodies within said printing zone, and a plurality of ink stations (5) each comprising a printing plate (31) configured to contact the printing surfaces of passing blankets in order to impart an ink image to the printing surfaces, such that a composite ink image is formed on each blanket printing surface and is printed onto a can body upon contact of the blanket printing surface and the can body within the printing zone. The apparatus is configured such that at least one of the blankets has a surface height variation across its printing surface representing a secondary image to be transferred to can bodies with which the blanket comes into contact. A drive mechanism (32) is provided for causing the printing plates to rotate and a drive mechanism controller for varying the rotational speed of the printing plates to synchronise the positions of the printing plates with blankets onto which ink images are to be transferred.