Patent ID: 7070180
Filing Date: 2006-07-04
Classification: B65H

Abstract:
1. A method for stacking flat mailings having stacking compartments comprising an underfloor belt and a stack support releasably coupled thereto, wherein the mailings are stacked standing upright, the underfloor belt and the stack support with growing stack are moveably displaceable away from the stacking point, the mailings transported in one after another are moved to a stop with an aid of a stacking roll thereby forming a stack, movement of the underfloor belt and the stack support away from the stacking point is carried out on the basis of a measured thickness of each mailing supplied and to be stacked and according to the stacking forces measured by force sensors at different heights in the region of the stacking roll, comprising the steps of: measuring a height and length of a mailing to be stacked, measuring a thickness of the mailing; moving the underfloor belt with the stack support away from the stacking point by an amount substantially equal to the measured thickness less a specific amount; after the mailing has reached the stop, measuring the stacking forces in the region of the stacking roll; in a correction control loop, in accordance with a type of overshoots with respect to at least one of height, number and duration from predefined threshold values, moving the underfloor belt with the stack support in order to maintain defined stacking conditions; and preevaluating the force sensors, a type of evaluation and threshold values in a prior test phase for each mailing format on a basis of statistical investigations.