Sheet stacking apparatus and method for controlling the feed of sheet material into a stacking wheel

US6623001B2 · kind B2 · utility

Assignee

• GIESECKE & DEVRIENT GMBH · DE

Inventors

• Alexander Steinkogler · Munich, DE
• Thomas Hildebrandt · Pliening, DE
• Michael Stapfer · Neubiberg, DE

Key dates

• Filing date: Jun 20, 2001
• Grant date: Sep 23, 2003
• Expiry date: Jul 7, 2021

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B65H2701/1912
• WIPO field: Handling
• WIPO sector: Mechanical engineering

Abstract

In a sheet stacking apparatus, in particular spiral slot stacker, one determines the relative position of a group of sheets 7A, 7B, for example distance ta between the sheets or total length tL of overlapping sheets. Sheet sensor 16 is mounted for this purpose at a large distance before input point 15 so that irregularities such as distance and/or overlap within the group of sheets 7A, 7B are taken into account and corresponding steps can be taken before leading sheet 7A is fed into stacker slot 2 of stacking wheel 1. Depending on the kind of irregularity ascertained, stacking wheel 1 is stopped, slowed down or accelerated to permit collision-free feed of the group of sheets into common slot 2 or into separate slots 2. In special embodiments one influences the sheet speed by means of separately controllable transport path segments 12a, 12b, and/or input point 15 by means of control finger 8.