Sheet-guiding system

US5655449A · kind A · utility

Assignee

• Heidelberger Druckmaschinen AG · DE

Inventors

• Manfred Henn · Heidelberg, DE
• Josef Wehle · Schwetzingen, DE

Key dates

• Filing date: Sep 1, 1995
• Grant date: Aug 12, 1997
• Expiry date: Sep 1, 2015

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B65H2406/11325
• WIPO field: Handling
• WIPO sector: Mechanical engineering

Abstract

A gripper device of a sheet-guiding system grips a leading edge of a sheet freshly printed on at least one side thereof. The sheet is guided along an imaginary guide path in a sheet travel direction extending perpendicularly to the leading edge of the sheet. A plurality of first air blast nozzles having respective nozzle openings emit an air flow onto a surface of the sheet. The air flow has a first main flow direction extending in parallel with and in the direction of sheet travel. A plurality of second blast nozzles emit respective air jet bundles in a respective second main flow direction perpendicular to the leading edge of the respective sheet. The first and the second main flow directions, respectively, intersect at a common starting point and define an angle therebetween having a maximum value of 90.degree. and, in a condition wherein the second main flow direction of the air jet bundles is inclined with respect to the guide path, an imaginary elongation of a central air jet of the air jet bundles, respectively, passing through the guide path and impacting with the first nozzle openings.