The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 22, 2019
Filed:
Sep. 12, 2012
Charles Boegli, Marin-Epagnier, CH;
Steffen Weissmantel, Chemnitz, DE;
Günter Reisse, Chemnitz, DE;
Peter Lickschat, Parthenstein, DE;
Werner Steffen, Stansstad, CH;
Charles Boegli, Marin-Epagnier, CH;
Steffen Weissmantel, Chemnitz, DE;
Günter Reisse, Chemnitz, DE;
Peter Lickschat, Parthenstein, DE;
Werner Steffen, Stansstad, CH;
Boegli-Gravures S.A., Marin-Epagnier, CH;
Abstract
A method for structuring a steel embossing roller surface includes using a short pulse laser including at least one of a femtosecond laser and a picosecond laser. The structuring is macrostructuring with dimensions of over 20 μm and depths up to 150 μm and more. The short pulse laser has: in single pulse operation, a fluence in the range of 0.5 J/cmto 3.5 J/cm, and in burst operation, a mean burst fluence of 0.5 J/cmto 70 J/cmper pulse; a wavelength of 532 nm to 1064 nm; a repetition rate of 1 kHz to 10 MHz; a pulse to pulse spacing on the roller of 10% to 50% of the beam diameter for the femtosecond laser and of 10-25% and 40-50% of the beam width for the picosecond laser; a laser pulse position near the roller surface; and deflection velocities of up to 100 m/s and more.