Abstract:
A porous surface is selectively formed on a workpiece such as a medical implant by pulsing a laser device in a controlled manner to produce a plurality of small, spaced-apart cavities of uniform or variable depth. The porous surface provides a mechanical grip with bone cement as well as a medium for bone and tissue ingrowth.
Abstract:
Method for pressing a material into a through-hole or blind-hole in a substrate. The material is disposed on the surface of the substrate. An environment is provided permitting the material to flow for example by heating the material to the glass transition temperature or above. Thereafter pressure is applied causing the material to flow, first coating the sidewall of the hole and on the continued application of pressure the material flows to completely fill the hole. The resulting substrate can have a substantially planar surface having holes with the periphery coated with or completely filled with the material. The material is preferably a thermoplastic polymeric material such as a polyimide and a perfluorinated polymer.
Abstract:
A laser output is converted into a pulse output and the pulse output is made variable in accordance with each portion of a copper foil portion and a resin portion of the surface of a print board and a copper foil portion of the back surface.
Abstract:
Connector and processes for preparing same for demateably interconnecting arrays of contact pads. The connector has a preformed elastomeric sheet-form member provided with a series of apertures through each of which an electrically conductive plated metal deposit extends. An integral end of the deposits protrudes outwardly beyond a surface of the sheet-form member, forming contact surfaces for demateably engaging the pads.
Abstract:
A process for making a shaped member from sheet metal pieces (37,38) of different thicknesses. In the process flat sheet metal pieces (37,38) are butt welded at their cut edges by laser beam welding. Then the unit, welded together from a number of sheet metal pieces (37,38) of different thickness, are converted into a shaped member by pressing or deep drawing. Since the material of sheet metal pieces (37,38) is not much affected by laser beam welding and the laser-beam-welded joint (39) does not expand much, the joint (39) has no adverse effect on shaping, nor is any anti-corrosion protection, for example, of zinc lost during laser beam welding.
Abstract:
A method for producing holes in a workpiece by means of a laser beam which comprises the steps of coating at least one face of the workpiece with an organic agent prior to contact of the laser beam with the workpiece in order to thereby prevent a fusion of the workpiece material ejected in liquid state with an outer face of such workpiece during the boring process. There is also disclosed an apparatus used in the performance of this method and for coating both sides of disc-shaped workpieces which incorporates two band members guided above one another at a spacing along a predetermined path. This spacing of the band members is smaller than the height of the workpieces. One of the band members has a smooth surface and the other an adhesive surface, and two coating locations are arranged such that one is before and the other behind the aforementioned predetermined path.
Abstract:
A LIGHT ABSORBING THERMOPLASTIC SHEET MAY BE CONVERTING INTO A NONWOVEN TEXTURED FABRIC BY DIRECTING A PULSED LASER BEAM ONTO EACH AREA OF A PREDETERMINED PATTERN OF MINUTE CLOSELY-SPACED AREAS OVER THE SURFACE OF THE SHEET WITH SUFFICIENT INTENSITY TO CAUSE THE SHEET TO MELT AND BE PERFORATED IN EACH SUCH AREA. WHILE THE AREA IS MOLTEN, A STREAM OF AIR OR OTHER GAS MAY BE DIRECTED INTO THE AREA WITH SUFFICIENT FORCE AND DURATION TO FIBRILLATE OR OTHERWISE FORM THE MOLTEN MATERIAL THEREIN.
Abstract:
A process for selectively removing a dielectric layer from a portion of a panel to create a coated and an uncoated region, the process including (a) applying a laser-termination bead on the panel to separate a first region corresponding to the coated region from a second region corresponding to the uncoated region; (b) applying a dielectric coating over the panel and the laser-termination bead; (c) cutting the dielectric layer along the laser-termination bead with a laser beam; and (d) peeling away the dielectric layer from the second region. The panel may be a direct radiography panel; the dielectric layer may be a polymer such as parylene; the laser-termination bead may be an epoxy; and/or the laser may be an excimer laser.
Abstract:
Foils are manufactured by creating a pattern on a substrate and then thickening the patterned film. The foil may then be peeled away from the substrate and/or pattern. The patterning step may include use of a laser or use of a photoresist, and may include deposition of a further layer. The thickening step may be performed by electrodeposition or electroless methods. The foils produced may be employed for dry shavers, sieves or filters.