Method and apparatus to determine folding deviations

US4578052A · kind A · utility

Assignee

• VEB Kombinat Polygraph Werner Lamberz Leipzig · DE

Inventors

• Andreas Engel · Hiltenfingen, DE
• Frank Schumann · Heidelberg, DE
• Werner K. Stiefel · Kendall, US
• Reinhold Freistedt · Markranstädt, DE

Key dates

• Filing date: Sep 15, 1982
• Grant date: Mar 25, 1986
• Expiry date: Sep 15, 2002

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B65H2701/1123
• WIPO field: Handling
• WIPO sector: Mechanical engineering

Abstract

In a method and an apparatus to test folded sheets for folding deviations from the reference folding line, to be used in pocket folding - or cutting folding machines, markings are made on the folding material, corresponding with the print format, and are sensed by sensors, preferably electro-optical reflection sensors after the material has been folded inside the machine, to obtain the position information. The evaluation position information derived from the output of the sensors for a number of folded sheets is rigid to determine the adjustments of the machine necessary to correct the deviations.