Apparatus for stacking sheets

US5397120A · kind A · utility

Assignee

• E.C.H. Will GmbH · DE

Inventors

• Friedrich Schulz · Memmingen, DE
• Wolfgang Faust · Schüttorf, DE
• Norbert Rilitz · Hamburg, DE
• Arthur van Wijk · Hamburg, DE

Key dates

• Filing date: Feb 10, 1994
• Grant date: Mar 14, 1995
• Expiry date: Feb 10, 2014

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B65H2511/10
• WIPO field: Handling
• WIPO sector: Mechanical engineering

Abstract

An apparatus for stacking successive rapidly advancing sheets of a stream of sheets has a platform which receives successive sheets and descends at the rate of accumulation of one or more stacks thereon. The sheets are delivered by one or more overhead belt conveyors in cooperation with one or more lower belt conveyors. The front end turn of the lower reach of each overhead conveyor is deflected around a small-diameter rigid rod immediately in front of a stop for the leaders of successive sheets to reduce the likelihood of buckling during stacking, and one or more downwardly sloping ramps are provided in front of the stop to deflect the leaders of successive sheets in a downward direction toward the leaders of the immediately preceding sheets in immediate or close proximity of the stop. The stop, the rod and the overhead conveyor or conveyors are adjustable in several directions to facilitate a change of setup for the stacking of longer, shorter, wider or narrower sheets. At least one of the ramps has one or more openings for the front end turn or turns of the overhead conveyor or conveyors.