Abstract: A printing apparatus and a printing method capable of preventing stacks of printed sheets from falling apart which can occur when continuously printing stacks of sheets of different sheet sizes. A printing press is controlled to suspend printing for removal of printed sheets, to change the storage destination of the printed sheets or to change printing order, based on a result of sequential or simultaneous comparisons between print sizes of a plurality of print data and a previously determined permissible limit.

Abstract: The stacker for stacking sets of cards comprises a container for receiving a set of boarding passes and a stacking section for stacking these boarding passes in the container in the fixed orientation. In the stacker, the container has first and second walls opposing each other, and the stacking section includes a first ejecting portion for ejecting the boarding pass into the container from the second wall side, such that front of the boarding pass faces the first wall, a second ejecting portion for ejecting the boarding passes into the container from the first wall side, such that the back of the boarding pass faces the second wall, and a feeder for supplying the passes to one of the first and second ejecting portions sequentially.