Object holder for a direct-to-object printer

A direct-to-object print system for printing on a surface of an object, the direct-to-object print system comprising:

• at least one printhead configured to eject marking material on to a surface of an object;
• a support member positioned parallel to a plane formed by the printhead;
• an object holder comprising:
• a shuttle mount configured to slideably traverse the support member;
• at least one block of memory foam attached to the shuttle mount;
• and
• a pump for drawing a volume of air through a hole in the foam block such that, when a vacuum is drawn through the hole, a difference in air pressure causes an object to be pressed against the block of memory foam, the foam block partially deforming to a shape of the object;
• and
• a controller configured to cause the printhead to eject marking material onto the object held by the object holder as the object passes the printhead.