Patent ID: 6318954
Filing Date: 2001-11-20
Classification: B65H,Y10S

Abstract:
A device for stacking sheets on pallets, comprising:a vertically stationary feeding conveyor for the sheets arranged above a floor at a height exceeding a maximum stacking level;a raisable and a lowerable storage platform adapted to receive a pallet on which a stack is to be formed located at a downstream end of said conveyor; andat least three optical sensors arranged vertically one above the other at a slight distance below a feeding level at said downstream end of said conveyor and upstream of said platform at an inlet side thereof for detecting a height of the stack formed on said platform, the optical sensors being separately activatable so that selectively two of said sensors are activated for a particular sheet type while all others of said sensors are inactive, the vertical distance between two sensors being a maximum of 20 mm.