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:
Feb. 02, 2016
Filed:
Feb. 24, 2005
Päivi Määttä, Imatra, FI;
Petri Laakso, Lappeenranta, FI;
Jari Hovikorpi, Kotka, FI;
Risto Vesanto, Imatra, FI;
Päivi Määttä, Imatra, FI;
Petri Laakso, Lappeenranta, FI;
Jari Hovikorpi, Kotka, FI;
Risto Vesanto, Imatra, FI;
STORA ENSO OYJ, Helsinki, FI;
Abstract
The invention relates to a method for sealing a fiber-based material () to a counter-surface to be bonded to it by melting polymer present at the sealing point. In accordance with the invention, the sealing is performed by directing a laser beam () through the fiber layer () of the material to a radiation-absorbing pigment disposed in the sealing area (), with the absorption heat melting the polymer () and generating the sealing. The method allows sealing of plastic-coated paper or board to itself, to another plastic counter-surface or also to paper or board without any plastic coating. It is also possible to seal uncoated paper or board to paper or board containing plastic, such as plastic-coated paper or board, or to a plastic film. The absorptive pigment, e.g. carbon black, may be admixed in the plastic coating of the board or paper or the plastic film formed on the counter-surface, or the pigment may be located on the surface of the material to be sealed or its fiber layer, or on the counter-surface to which the material is sealed, e.g. as a component of printing ink applied to the counter-surface.