Christopher E Dackson

20130233836, Sep 12, 2013

Sep 12, 2011

13/261630

Christopher Dackson - Ypsilanti MI, US

B23K 26/14

21912164, 21912163

Machinery and process are disclosed for laser welding. A beam is generated and focused on a discrete work surface, with a distinctive nozzle provided for delivering plasma suppression gas toward the surface. The nozzle has first and second inlets for receiving first and second sources of different plasma suppression gases, respectively. The nozzle has first and second outlets in fluid communication with the first and second inlets, respectively, together directing an externally mixed stream of the gases from the nozzle at an angle of incidence of 35 degrees to 50 degrees relative to the surface to impinge upon the generated plasma. The impinging stream intersects the beam at or above the surface, as the mixed gases are deflected across the beam. The invention saves on helium costs and demonstrably increases weld penetration.

54969859, Mar 5, 1996

Apr 1, 1994

8/221955

Robert S. Foltz - Rochester NY
Ronald A. Gaither - Fairport NY
Alfred O. Klein - Rochester NY
John J. Wilbert - Macedon NY
Henry T. Mastalski - Webster NY
Peter J. Schmitt - Ontario NY
Eugene A. Swain - Webster NY
Christopher E. Dackson - Ypsilanti MI

Xerox Corporation - Stamford CT

B23K 2614

21912167

A laser ablation apparatus includes a nozzle, disposed through a housing, wherein the nozzle has: (i) a nozzle housing comprised of a bottom surface; (ii) a first orifice defined by the bottom surface; (iii) a second orifice defined by the bottom surface; (iv) a first passageway defined by the nozzle housing in communication with the first orifice; and (v) a second passageway defined by the nozzle housing in communication with the second orifice, wherein the portion of the second passageway adjacent the second orifice forms an angle. theta. sub. 3 with the portion of the first passageway adjacent the first orifice, wherein the angle. theta. sub. 3 is effective for directing a first fluid stream through the second orifice at the surface of the enclosed substrate portion to facilitate removal of the coating in the form of coating debris during or subsequent to exposure of the coating of an enclosed substrate portion to high energy radiation. A high energy radiation generating apparatus and a first fluid stream generating apparatus are coupled to the nozzle. A second fluid stream nozzle is disposed in a direction for directing a second fluid stream against the first fluid stream to keep coating debris inside the housing.