Device for monitoring sheet transport in a feeder of a printing machine

US4738442A · kind A · utility

Assignee

• Heidelberger Druckmaschinen AG · DE

Inventors

• Anton Rodi · Leimen, DE
• Dieter Uhrig · Eberbach, DE
• Karlheinz Krestyn · Leimen, DE

Key dates

• Filing date: Oct 25, 1985
• Grant date: Apr 19, 1988
• Expiry date: Oct 25, 2005

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B65H7/14
• WIPO field: Handling
• WIPO sector: Mechanical engineering

Abstract

A device for monitoring sheet transport at sheet feeders for printing machines includes at least one photo-sensor disposed above at each side, respectively, of the sheet feeder, apparatus for providing adjustable positioning of said photo-sensors in spaced relation to the leading edge and corners of the sheet; control logic responsively connected to the photo sensors for processing signals from the photo-sensor for producing a fault indication in case a sheet feeding failure is detected by the photo-sensors.