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OwnerJan Drechsel, Robby Ebertinventors
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The invention relates to a method for introducing a defined weakening line by means of material removal on a cover material (20) which has a visible side (22) and a rear side (21) opposite the visible side (22), in which a pulsed laser beam (31) from a laser (30) is aimed at the rear side (21) of the cover material (20) and is guided along a path (50) and at least one observation unit (11) for monitoring the weakening process is provided underneath the visible side (22) of the cover material (20), wherein a second laser beam (61) from a second laser (60) is coupled into the beam path of the first laser beam (31), wherein the first pulsed laser beam (31) is used to produce the weakening line, and the radiation from the second laser beam (61) that emerges on the visible side (22) is detected by the at least one observation unit (11).
A method for introducing a defined weakness line by material removal on a covering material for producing a cover for airbags, wherein the covering material has a visible side and a rear side opposite the visible side, and a pulsed first laser beam is guided from a first laser towards the rear side of the covering material and along a track, and at least one observation unit is provided below the visible side of the covering material for monitoring the weakening process, characterised in that a second laser beam from a second laser is coupled into the beam path of the first laser beam, wherein the first pulsed laser beam serves to generate the weakness line, and the second laser beam, emerging on the visible side, is detected by the at least one observation unit.
Dependencies are inferred from the claim text.