Primer apparatus

A primer roller, comprising:

• a cylinder providing an outer support surface with a length in an axial direction and a fixed outer diameter extending along the length, wherein the cylinder comprises an adapter cylinder extending along the length mounted on a roller mandrel cylinder extending along the length;
• and
• at least one elastically deformable annular sleeve having:
• an axial length less than the axial length of the outer support surface of the cylinder,
• an external diameter greater than the outer diameter of the outer support surface of the cylinder, and
• an internal diameter which provides a friction fit on the outer support surface of the cylinder;
• and
• wherein the outer support surface of the cylinder comprises a plurality of fluid outlets, the outlets being distributed about the outer support surface, and wherein fluid expelled from the fluid outlets enables the sleeve to be slidably positioned relative to the outer support surface.