Printing press and method for operating a dryer device that comprises a dryer and a control device in a printing press

US10220606B2 · kind B2 · utility

Assignee

• KOENIG & BAUER AG · DE

Inventors

• Sebastian Franz · Veitshöchheim, DE
• Michael Scheller · Unterpleichfeld, DE

Key dates

• Filing date: Mar 18, 2016
• Grant date: Mar 5, 2019
• Expiry date: Mar 18, 2036

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B41F33/16
• WIPO field: Textile and paper machines
• WIPO sector: Mechanical engineering

Abstract

A dryer device for a printing press that prints in at least one printing position on a printing substrate by use of at least one printing unit, in particular a printing press for securities, includes a dryer with a drying unit formed by an array of a plurality of adjacent radiation sources. That array extends at least over the maximum width of the printing substrate and is used to supply radiation to the printing substrate in each activated state for drying the latter. A control device allows the radiation sources or some of the radiation sources to be switched on or off in a repeating cycle that comprises a sequence with at least one active and at least one inactive phase in correlation with one of a press and a printing-substrate phase position. The dryer device comprising the dryer and the control device is configured to switch on and switch off, for each cycle, only some of the radiation sources in some sections in at least four pre-definable radiation-source groups, spaced approximately equidistantly, i.e. at a distance deviating by a maximum 20% from the average distance and transversely to a transport direction, one of concurrently and collectively according to a sequence co…