Method and apparatus for the alignment of paper stacks in a printing press by optical beams reflected therefrom

US5256884A · kind A · utility

Assignee

• Heidelberger Druckmaschinen AG · DE

Inventors

• Helmut Buck · Schriesheim, DE
• Ludwig Bergann · Berlin, DE

Key dates

• Filing date: Mar 25, 1992
• Grant date: Oct 26, 1993
• Expiry date: Mar 25, 2012

Classification

• Technology area (CPC G): Physics
• CPC primary: G01S17/48
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A method and apparatus for the alignment of paper stacks in a printing press provides essentially uninterrupted printing through the transfer of supply of sheets of paper from a first stack of papers to a second stack of papers by reducing mechanical strain in the control and operation of the sheet feeder of the printing press.