Variable trajectory document restacking system

Details Variable trajectory document restacking system Variable trajectory document restacking system

1992-03-05

1992-10-06

Skaggs, H. Grant

Sheet feeding or delivering

Delivering to stack and feeding therefrom

With sheet sensor for selective location

4147946, 271 81, 271207, B65H 522

Patent

active

051525151

ABSTRACT:
In a stacking system for sequentially feeding flimsy sheets to be stacked in a generally horizontal stack thereof in a stacking tray by ejecting the sheets sequentially out over the stack with a preset sheet ejection trajectory angle to fall by gravity and settle onto the top of the stack, first estimating the height of the stack in the stacking tray to provide a stack height control signal proportional to the height of the stack, and then changing the sheet ejection trajectory angle at which the sheets are to be ejected in response to this stack height control signal before the sheets are ejected such that the sheet ejection trajectory angle, and the height of the release point of the sheet at ejection relative to the tray, is automatically lowered for smaller stack heights and automatically raised for an increased stack height, to thereby minimize the settling time of ejected sheets onto the stack for improved restacking for a wide range of stack heights. Where the sheets are ejected from adjacent one side of the tray towards an impact position with a restacking wall adjacent an opposite side of the tray, the change in trajectory angle desirably changes this impact position.

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patent: 5078378 (1992-01-01), Kapadia et al.

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