Drum stencil printing system

A drum stencil printing system for printing on a concave surface, the drum stencil printing system comprising:

• a securing mechanism configured to maintain a substrate having a concave surface in a secured position;
• a pliable drum stencil comprising a rigid stencil connected by a flexible elastomer to the drum stencil printing system, the drum stencil being configured to be inserted into the concave surface of the substrate when the substrate is maintained in the secured position;
• and
• a rotating printhead positioned inside of the pliable drum stencil configured to print a slurry through the rigid stencil of the drum stencil onto the concave surface of the substrate;
• wherein the radial distance between the printhead and the rigid stencil of the drum stencil is decreased as the drum stencil inserts into the concave surface;
• wherein the flexible elastomer of the drum stencil enables pressure applied by the printhead on the rigid stencil to displace the rigid stencil to make contact with the substrate at the point where the printhead is printing the slurry through the rigid stencil;
• wherein the flexible elastomer of the drum stencil enables the rigid stencil to return to an undisplaced position out of contact with the substrate when the printhead is not applying pressure to the drum stencil.