A sheet ejection device includes: a paper ejection chain (22b) for conveying paper (W); a first pile (26) or a second pile (26b) having loading plates (27a or 27b) arranged in a multistage manner and used for loading the paper ejected from the paper ejection chain; a first beam sensor (62a or 62b), a second beam sensor (63a or 63b), and a third beam sensor (64a or 64b) for detecting an intrusion into the first pile or the second pile. The sheet ejection device further comprises: a plate upper-limit position detection sensor (58a or 58b) for detecting that the loading plate has been positioned at a plate upper-limit position (L2); and a control device (50) for, based on the detection signal of the plate upper-limit position detection sensor, neglecting (disabling) a command for stopping a driving device (printing machine), the command is issued by the first to third beam sensors.

A stacking apparatus includes a conveyance unit, a stacking unit, and a separation member supply unit. The conveyance unit conveys sheets for circuit board. The stacking unit stacks the sheets. The separation member supply unit supplies a separation member to separate the stacked sheets at any position. The separation member supply unit places the separation member on the sheet in being conveyed.

Apparatus and methods for a stacking purge-bin (SPB) are provided. The SPB may be configured to rotate. The SPB may include a plurality of receiving sections. One or more tangible items retracted by the SSK may be stored in each receiving section. Rotating the SPB between each retraction may prevent tangible items from two consecutive retractions from being stored in a single receiving section. Preventing tangible items from two consecutive retractions from being stored in a single receiving section may allow each tangible item to be associated with transaction information corresponding to a retraction. The SPB may store separators. A separator may be inserted between tangible items received from two consecutive retractions. Separating between tangible items received from two consecutive retractions may allow each tangible item to be associated with transaction information corresponding to a retraction. Transaction information associated with a retraction may be marked on the separator.

Apparatus and methods for a stacking purge-bin (SPB) are provided. The SPB may be configured to rotate. The SPB may include a plurality of receiving sections. One or more tangible items retracted by the SSK may be stored in each receiving section. Rotating the SPB between each retraction may prevent tangible items from two consecutive retractions from being stored in a single receiving section. Preventing tangible items from two consecutive retractions from being stored in a single receiving section may allow each tangible item to be associated with transaction information corresponding to a retraction. The SPB may store separators. A separator may be inserted between tangible items received from two consecutive retractions. Separating between tangible items received from two consecutive retractions may allow each tangible item to be associated with transaction information corresponding to a retraction. Transaction information associated with a retraction may be marked on the separator.