Patent ID: 7319204

Claim:
A laser welding device including: a laser that generates a laser beam, an optics defining a focal length of at least 200 mm, and configured to focus the laser beam onto a processing zone of a workpiece, and at least one gas nozzle disposed at a distance of at least 100 mm from the processing zone and generating at least one gas flow that is directed into the laser beam and that penetrates through the laser beam, wherein the gas flow of the at least one gas nozzle is directed to the processing zone, to a region in front of the processing zone, or to both the processing zone and the region in front of the processing zone such that a mixture of welding gases and heated ambient air, produced during laser welding, is limited within the laser beam to the region, wherein the region extends up to maximally about 150 mm from the processing zone and maximally to the gas nozzle.