A print bar structure, a printing apparatus, and a method of printing

A print bar structure for a printing apparatus for use in printing on an outer surface of an object comprising at least one cylindrical portion, wherein the print bar structure comprises:

• a body defining a print zone for receipt of the object to be printed, wherein the print zone has a central axis;
• and
• a plurality of radially spaced attachment formations provided adjacent the print zone for attachment of a plurality of print heads, wherein the print heads are operatively disposed within the print zone to form an arch within the print zone to deposit fluid from a fluid source onto the object along a printing axis which is at least transverse to the central axis of the print zone, wherein the print bar structure comprises a plurality of print banks, wherein each print bank comprises attachment formations for one or more print heads, and wherein each print bank extends along an axis which is obliquely oriented with respect to the central axis or wherein the arch defined by the print heads extends along an axis which is obliquely oriented with respect to the central axis.

A method as claimed in claim 19, wherein the method comprises displacing the object, by way of the displacement arrangement, along a path aligned with the central axis in a first direction into the print zone.