Patent ID: 6348241
Filing Date: 2002-02-19
Classification: B08B,Y10S

Abstract:
Method for treating the internal surface of a gas bottle, comprising the steps of:a) introducing an incident laser treatment beam into the bottle through a mouth of the bottle, approximately along the axis of the bottle, wherein the laser beam has a wavelength in the near infrared; b) deflecting the laser beam in the bottle onto the internal surface of the bottle; c) generating a relative rotation between the bottle and the deflected laser beam approximately about the axis of the bottle; and d) generating a relative displacement between the bottle and the deflected laser beam, wherein two successive scans of most of the internal surface of the bottle are made, a first scan by the laser beam producing an ablation of a surface layer of the internal surface of the bottle, under an action of a shock wave, followed by a second scan by the laser beam producing a thermal effect at the surface of the bottle, resulting in a remelting of the internal surface.