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US 11,890,861 B2Granted
Method of curing coatings in a printing machine using differently actuated gas discharge lamps, printing machine and method of using a gas-discharge lamp
AssigneeHeidelberger Druckmaschinen AG
InventorsMatthias Schloerholz, Michael Kohlmann
Life of this patent
Estimating the term…
Abstract
A method of curing radiation-curable coatings in printing machines using UV light includes using the same light source or sources for the pinning and final curing operations in two different modes of operation suitable for pinning and for completely curing. The light sources are preferably gas-discharge lamps, in particular xenon flash lamps. A printing machine and a method for using at least one gas-discharge lamp are also provided.
Claims12
A method of curing radiation-curable coatings in a printing machine, the method comprising:
- producing a printing substrate having a radiation-curable coating by:
- i) pinning the radiation-curable coating by applying a first radiation at a first location in the printing machine, and
- ii) completely curing the pinned radiation-curable coating by applying a second radiation at a location different than the first location in the printing machine;
- using the same electrical radiation source or sources in a first electrical operating mode to apply the first radiation and in a second electrical operating mode to apply the second radiation;
- and
- providing the radiation applied by the electrical radiation source or sources with different radiation spectra in the first electrical operating mode and in the second electrical operating mode.
3 more elements
A printing machine, comprising:
- an electrical radiation source or sources including at least one gas-discharge lamp configured for both:
- a) pinning a radiation-curable coating by applying a first radiation at a first location in the printing machine, and
- b) completely curing the pinned radiation-curable coating by applying a second radiation at a location different than the first location in the printing machine,
- the same electrical radiation source or sources being used in a first electrical operating mode to apply the first radiation and in a second electrical operating mode to apply the second radiation;
- and
- the radiation applied by the electrical radiation source or sources being provided with different radiation spectra in the first electrical operating mode and in the second electrical operating mode.
3 more elements
A method, comprising:
- using at least one gas-discharge lamp for:
- a) pinning a radiation-curable coating by applying a first radiation at a first location in the printing machine, and
- b) completely curing the pinned radiation-curable coating by applying a second radiation at a location different than the first location in the printing machine,
- using the same electrical radiation source or sources in a first electrical operating mode to apply the first radiation and in a second electrical operating mode to apply the second radiation;
- and
- providing the radiation applied by the electrical radiation source or sources with different radiation spectra in the first electrical operating mode and in the second electrical operating mode.
3 more elements
Dependencies are inferred from the claim text.