Process for Introducing a Weakening Line Through Material Removal on a Fibrous Coating Material, in Particular Natural Leather
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United States of America Patent
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Mar 25, 2014
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Apr 24, 2013
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Method for introducing a line of weakness through removal of material at a fibrous covering material, in particular a natural leather, in which a pulsed laser beam is guided a plurality of times over the back side in a line-shaped manner, wherein only one laser pulse is emitted for each impingement point, and the laser pulse causes an input of energy which leads to a heating of the fibrous covering material at the impingement point to a temperature above an ablation threshold and which maintains the temperature below a limit temperature in regions of the covering material adjoining the impingement point.
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