Device for register-maintaining alignment of a flexible printing plate of a plate cylinder of rotary printing machine

US4603641A · kind A · utility

Assignee

• Heidelberger Druckmaschinen AG · DE

Inventors

• Willi Jeschke · Bad Herrenalb, DE
• Nikolaus Spiegel · Walldorf, DE

Key dates

• Filing date: Oct 24, 1985
• Grant date: Aug 5, 1986
• Expiry date: Oct 24, 2005

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S101/36
• WIPO field: Textile and paper machines
• WIPO sector: Mechanical engineering

Abstract

A device for register-maintaining alignment of a flexible printing plate of a plate cylinder of a rotary printing machine, the plate cylinder being formed with a cylinder channel, tensioning rails being disposed in the channel and clamping rails for firmly clamping a respective end of the printing plate on the tensioning rails, the tensioning rails being adjustable in peripheral direction of the plate cylinder by tensioning screws includes a device for scanning the position of the printing plate in vicinity of a leading edge of the printing plate, and an electrical display device for indicating the scanned position of the printing plate, the scanning device including sensors respectively engageable in register holes formed in the printing plate in vicinity of the leading edge of the printing plate, when the printing plate is placed upon the plate cylinder, a holder carrying the sensors and extending parallel to the axis of the plate cylinder within the cylinder channel, the sensors being pivotable in peripheral direction of the plate cylinder so that a displacement of the printing plate in peripheral direction of the plate cylinder results in a corresponding deflection of the senso…