| 摘要 |
A sheet stacking system is described herein which comprises an array of sheet stacking bins (11, 11a, 11b) for stacking a plurality of printed substrate sheets, a sheet feeding input path system for feeding selected sheets into a selected bin (11, 11a, 11b) to form a stack (51) therein, a bin fullness indicator system for indicating that the stack (51) has reached a preset allowable maximum, and a stacking control system (50), controlled by the bin fullness indicator system, to control the sheet feeding input path. The bin fullness indicator system includes a single stack height sensing system for measuring the stack height. A movable carriage system is employed for moving this single stack height sensing system from one bin to another to measure the stack height in respective ones of the bins (11, 11a, 11b). The stack height sensor includes a movable sensing element which is extended into an adjacent bin to detect the stack height therein. A signal generator is responsive to the sensing element position to provide control signals for the stacking control system. <IMAGE> |
