Pneumatic sheet registration and clamping

A pneumatic table for registering and clamping thereon a sheet of substrate media for handling in a printing system, the pneumatic table comprising:

• a media platen, the media platen having a foraminous upper surface for receiving a substrate media sheet;
• a reversible air blower, the reversible air blower selectively generating at least one of a positive air flow and a negative airflow through the foraminous upper surface, wherein the positive air flow forms a gaseous layer of air between the foraminous upper surface and the substrate media sheet, the negative airflow encouraging the substrate media sheet to remain fixed and engaged upon the foraminous upper surface;
• a registration wall extending along at least one edge of the foraminous upper surface;
• and
• a sheet biasing element, the sheet biasing element selectively applying a horizontal biasing force to the substrate media sheet encouraging movement of the substrate media sheet across the foraminous upper surface for engaging the substrate media sheet with the registration wall;
• wherein the reversible air blower is configured to provide a progressive transition across the foraminous upper surface from positive air flow to negative air flow.