Patent ID: 7379689

Claim:
A sheet post-processing apparatus for applying a specified post-processing to a sheet bundle formed by successively receiving sheets conveyed from an upstream apparatus, comprising: a main storing section for storing sheets successively received from the upstream apparatus while stacking the sheets one over another for application of a post-processing; an auxiliary storing section disposed immediately upstream of the main storing section to form a set including a batch feed number of sheets to be batch fed, the auxiliary storing section being adapted to temporarily save a specified number of sheet(s) being fed to the main storing section and cause the temporarily saved sheet(s) to accompany the sheet conveyed next, thereby batch feeding the set of the sheets to the main storing section; and a controller for executing such a control as to batch feed remaining sheet(s) by causing the remaining sheets to accompany the temporarily saved sheet(s) of a previous set if the remaining sheet(s) falls short of the batch feed number.