Abstract: A right angle turn module having a first transport that transports side-by-side sheets in a first direction. Downstream of the first sheet transport a barrier is positioned to stop the sheets. A sensor device detects an arrival of the side-by-side sheets at the stop arrangement. Then, an actuated second sheet transport, triggered by the sensor device, is activated to transport the sheets serially in a second direction substantially perpendicular to the first direction. In a preferred embodiment, a horizontal guide plate is positioned at a downstream end of the first sheet transport. With the guide plate thus positioned, a sheet traveling in the first direction and a sheet traveling in the second direction can temporarily be overlapped and a collision can be avoided. In a further preferred embodiment, the first transport further comprises overhead belts to urge the side-by-side pair of sheets in the first direction.

Abstract: An improved sheet accumulator for stacking serially fed sheets transported on a paper path. The accumulator includes a guide deck. Above the guide deck, a plurality of parallel belts are positioned to provide a driving force for sheets on the deck. Within the accumulator, a ramp apparatus is positioned across the paper path whereby sheets driven by the belts on an upstream portion of the accumulator deck are driven over the ramp apparatus and deposited in an accumulating region of the accumulator deck on a downstream side of the ramp apparatus. Preferably, snap-down belts are provided between ramp structures snap transported sheets quickly into place on the stack and to hold them there. Sheets are stopped by an accumulator stop mechanism located at a downstream end of the accumulating region that prevents movement of sheets by the belts while sheets for an accumulation are being collected.

Abstract: An improved sheet accumulator for stacking serially fed sheets transported on a paper path. The accumulator includes a guide deck. Above the guide deck, a plurality of parallel belts are positioned to provide a driving force for sheets on the deck. Within the accumulator, a ramp apparatus is positioned across the paper path whereby sheets driven by the belts on an upstream portion of the accumulator deck are driven over the ramp apparatus and deposited in an accumulating region of the accumulator deck on a downstream side of the ramp apparatus. Preferably, snap-down belts are provided between ramp structures snap transported sheets quickly into place on the stack and to hold them there. Sheets are stopped by an accumulator stop mechanism located at a downstream end of the accumulating region that prevents movement of sheets by the belts while sheets for an accumulation are being collected.