Heidelberger Druckmaschinen Ag

Sven Butschko

Burkhard Wolf

Jochen Renner

Andreas Müller

Ralf Steinmetz

Jörg-Achim Fischer

Matthias Zapf

Jörg Schilfahrt

Michael Postels

Burghart Schnabel

Rene Stückroth

Joerg Schilfahrt

Manfred Häußler

A method for cleaning nozzle surfaces of an inkjet print head assembly includes using a cleaning slide to carry out a movement along the assembly and clean the nozzle surfaces with a cleaning liquid in ultrasonic vibration. The cleaning slide includes an ultrasonic cleaning device, a suction device, and a rinsing device and the movement of the cleaning slide includes a forward movement and a backward movement. During the forward movement, the ultrasonic cleaning device and the suction device following the ultrasonic cleaning device are activated while the rinsing device following the two is deactivated. During the backward movement, the rinsing device and the suction device following the rinsing device are activated while the ultrasonic cleaning device following the two is deactivated. Cleaning liquid and contamination are advantageously prevented from reaching the interior of print heads or into an ink supply system thereof, preferably in industrial inkjet printing.

Method of cleaning nozzle surfaces of an inkjet print head assembly

A seal for a doctor blade device in a printing press includes a blade contacting section with a front side engaged with a doctor blade of the doctor blade device and a rear side that is softer, more elastic or more resilient than the front side. A doctor blade device having a seal is also provided.

Seal for doctor blade devices and doctor blade device having a seal

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Dossenheim, Germany

Sven Butschko