Sheet loader, sheet folding apparatus, and sheet finishing system

摘要

A sheet loader for loading a folded sheet bundle provided from a sheet bundle provider with a folded edge of the folded sheet bundle in a lead, including: an undersurface support configured to support an undersurface of the folded sheet bundle provided from the sheet bundle provider; a folded edge blocker configured to take a blocking position to block the folded edge of the folded sheet bundle on the undersurface support and a releasing position to release the folded sheet bundle; and a joint configured to evacuate from an orbit of the folded edge blocker returning from the releasing position to the blocking position, the joint is configured to join the undersurface support with the folded edge blocker at the blocking position after the returning to the blocking position.