Drying unit for drying printed substrates

US11220101B2 · kind B2 · utility

Assignee

• KOENIG & BAUER AG · DE

Inventors

• Johannes Schaede · Würzburg, DE
• Robert Stierman · Alphen aan den Rijn, NL

Key dates

• Filing date: Oct 22, 2019
• Grant date: Jan 11, 2022
• Expiry date: Oct 22, 2039

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B41F23/0486
• WIPO field: Textile and paper machines
• WIPO sector: Mechanical engineering

Abstract

The invention relates to a drying unit (22) for drying printed substrates (21), comprising a chamber (23) with a gaseous medium which is oxygen-reduced by means of an inert gas, wherein the substrates (21) are guided through the chamber (23) or at least can be guided through the chamber, and the chamber (23) has an entrance for the substrates (21) to be guided into the chamber (23) in the transport direction (T) of the substrates (21). The entrance for the substrates (21) to be guided into the chamber (23) is formed by two cylinders (04; 06) which are positioned against each other longitudinally. The cylinders (04; 06) positioned against each other at the entrance of the chamber (23) form a printing unit (03). One of the cylinders (04) is designed as a printing cylinder (04), and the other cylinder (06) is designed as a cylinder (06) which interacts with the printing cylinder (04) and applies a printed image onto the affected substrates (21). The two cylinders (04; 06) which are positioned against each other under pressure at the entrance of the chamber (23) form a seal which runs axially to the cylinders (04; 06) for preventing the oxygen-reduced gaseous medium from leaking out of…