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| Number | Title | Issue Date |
| 4128753 | Laser beam welding Laser beam welding apparatus comprising a body with a passage through which the laser beam is directed and focused to a position outside the body closely adjacent to a terminal portion of the passage. A second passage opens into the first to direct a tran... | 12/05/1978 |
| 4114985 | Shield for high power infrared laser beam Shielding from and the termination of high power infrared laser beams is accomplished by interception of the beam by one of two spaced, juxtaposed, ceramic sheet members. The beam intercepting member has a thickness to beam power density relationship that... | 09/19/1978 |
| 4099830 | Optical systems including polygonal mirrors rotatable about two axes An optical system suitable for use in machining plastics sheet material using a laser, brings a beam radiant energy in to a line focus on the work piece. The work piece is moving, and the line focus is perpendicular to the direction of such movement. The ... | 07/11/1978 |
| 4092515 | Laser method of precision hole drilling A method for obtaining a hole in a workpiece essentially free of a recast layer and heat affected zone with laser radiation is disclosed. Pulses of laser radiation having durations comparable to the time required to vaporize workpiece material, typically ... | 05/30/1978 |
| 4081653 | Removal of thin films from substrates by laser induced explosion Selected portions of a thin film coating of metal are removed from an insulative substrate by directing a coherent beam of light energy from a laser at the coating, to heat the coating and cause the evaporation and entrapment of the substrate material at ... | 03/28/1978 |
| 4081654 | Methods and apparatus for selectively removing a metallic film from a metallized substrate A metallized substrate is flexed to conform to the surface of a segment of a right circular cylinder. The metallized substrate is arcuately rotated and a planar apertured mask is simultaneously moved linearly in spaced tangential relationship to the flexe... | 03/28/1978 |
| 4058699 | Radiant zone heating apparatus and method A heating zone of accurately controlled length and predetermined energy profile throughout its length is formed within a focusing apparatus. An elliptical cavity is provided having a conically-configured reflector positioned such that its longitudinal axi... | 11/15/1977 |
| 4048459 | Method of and means for making a metalic bond to powdered metal parts A method of and means for making metallic bonds to powdered metal parts by brazing techniques is disclosed in which the braze material is heated to brazing temperature by a laser beam. Techniques for insuring a reliable bond without excessive absorption o... | 09/13/1977 |
| 4044936 | Glass tube cutting Apparatus for cutting glass tubing transverse to its length comprises a laser, an optical system for directing the laser along a full circumferential line around the tubing without rotating the tubing and means for forming a point of weakness on the circu... | 08/30/1977 |
| 4038513 | Process for energy beam perforation, especially electron beam perforation, of multi-layered artificial leather A process for the energy beam perforation of multi-layered artificial leather, which has an essentially impervious top layer and a support layer which is pervious to gas, wherein perforation is carried out with the support layer turned towards the beam.... | 07/26/1977 |
| 4032861 | Laser device for altering surfaces in accordance with given patterns A high gain optically pumped laser device includes a mask having cut-out portions defining a given pattern disposed in the resonant optical cavity defined between end mirrors at opposite ends of the laser material. Each of the end mirrors is equivalent to... | 06/28/1977 |
| 3965327 | Method of cutting material to shape from a moving web by burning A method and apparatus for cutting a predetermined pattern in a moving web of material, such as paper, cardboard or the like is disclosed wherein a laser beam is deflected by a series of pivotable mirrors. The pivoting of the mirrors is controlled so as t... | 06/22/1976 |
| 3942878 | Apparatus for modulating a high energy beam An apparatus for modulating a high energy beam such as a laser beam comprising a rotor having a plurality of circumferentially spaced selectively shaped openings formed in a periphery thereof and adapted to rotate in the path of said high energy beam for ... | 03/09/1976 |
| 3935117 | Photosensitive etching composition A method of forming patterns on a semiconductor element is disclosed comprising the steps of (a) depositing a coating of silicon nitride, borosilicate glass, or phosphosilicate glass on the surface of a semiconductor substrate, (b) applying a photosensiti... | 01/27/1976 |
