Abstract: For use with a physical document bearing content visible when illuminated by light in the human visible spectrum, a tag printer, a verifier and a document processing system employing one or both of the printer and the verifier. In one embodiment, the tag printer includes: (1) a processor operable to generate metadata regarding the physical document and (2) a printer associated with the processor and operable to print a tag containing the metadata on a location of the physical document irrespective of locations of the content using an ink substantially invisible in the spectrum.

Abstract: For use with a physical document bearing content visible when illuminated by light in the human visible spectrum, a tag printer, a verifier and a document processing system employing one or both of the printer and the verifier. In one embodiment, the tag printer includes: (1) a processor operable to generate metadata regarding the physical document and (2) a printer associated with the processor and operable to print a tag containing the metadata on a location of the physical document irrespective of locations of the content using an ink substantially invisible in the spectrum.

Abstract: Voids, cracks or other similar defects in substrates of thermal barrier coated superalloy components, such as turbine blades or vanes, are filled with resin, without need to remove substrate material surrounding the void by grinding or other processes. The resin is cured at a temperature under 200° C., eliminating the need for post void-filling heat treatment. The void-filled substrate and resin are then coated with a thermal barrier coating.

Abstract: Voids, cracks or other similar defects in substrates of thermal barrier coated superalloy components, such as turbine blades or vanes, are filled with resin, without need to remove substrate material surrounding the void by grinding or other processes. The resin is cured at a temperature under 200° C., eliminating the need for post void-filling heat treatment. The void-filled substrate and resin are then coated with a thermal barrier coating.

Abstract: A method for welding to a superalloy material without causing cracking of the material. The method includes the steps of depositing a weld strip (18) of a weldable material onto a superalloy substrate material (12) using a spray deposition process (20) and then forming a weldment (26) to the weld strip. None or a controlled amount of the substrate material (12) is melted during the weld in order to maintain the concentration of strengthening elements in the local melt within a zone of weldability. The spray deposition process may be a thermal process such as HVOF or a cold spray process. A groove (16) may be formed in a surface (10) of the superalloy substrate material to receive the weld strip. A diffusion heat treatment step may be used to improve adhesion between the weld strip and the superalloy material.

Abstract: A rotor for an axial flow turbomachine is provided. The rotor includes a plurality of rotor discs that are arranged in stacks and clamped together with at least one tie rod. At least one of the rotor discs of the rotor comprises a smaller outer diameter than one of the neighboring rotor discs and that the difference in diameter is compensated by a drum surrounding the rotor disc with the smaller outer diameter as a ring. The drum may be made of a heat resistant material. The rotor discs surrounded by the drum may be made of a less expensive material. Furthermore, the drum may include at least one more blade ring than the rotor discs that are surrounded by the drum.

Abstract: A rotor for an axial flow turbomachine is provided. The rotor includes a plurality of rotor discs that are arranged in stacks and clamped together with at least one tie rod. At least one of the rotor discs of the rotor comprises a smaller outer diameter than one of the neighboring rotor discs and that the difference in diameter is compensated by a drum surrounding the rotor disc with the smaller outer diameter as a ring. The drum may be made of a heat resistant material. The rotor discs surrounded by the drum may be made of a less expensive material. Furthermore, the drum may include at least one more blade ring than the rotor discs that are surrounded by the drum.

Abstract: A friction stir welding method including: feeding a filler material through a first passage in a friction stir weld tool and into a substrate during friction stir welding of the substrate; and rotating the filler material with respect to the substrate while feeding the filler material. In this method, heat generated by rotational frictional contact of the filler material contributes to plasticization of the filler material.

Abstract: A friction stir welding method including: feeding a filler material through a first passage in a friction stir weld tool and into a substrate during friction stir welding of the substrate; and rotating the filler material with respect to the substrate while feeding the filler material. In this method, heat generated by rotational frictional contact of the filler material contributes to plasticization of the filler material.

Abstract: A hybrid cast component (10) including both a columnar grained region (12) and a single crystal region (14) integrally formed and joined along a metallurgical boundary (32) in a single casting operation without the need for any weld or braze. A gas turbine blade formed as such may include a columnar grained airfoil and a single crystal platform without any necessity for a thermally formed joint at the blade fillet area.

Abstract: A hybrid cast component (10) including both a columnar grained region (12) and a single crystal region (14) integrally formed and joined along a metallurgical boundary (32) in a single casting operation without the need for any weld or braze. A gas turbine blade formed as such may include a columnar grained airfoil and a single crystal platform without any necessity for a thermally formed joint at the blade fillet area.

Abstract: A method for welding to a superalloy material without causing cracking of the material. The method includes the steps of depositing a weld strip (18) of a weldable material onto a superalloy substrate material (12) using a spray deposition process (20) and then forming a weldment (26) to the weld strip. None or a controlled amount of the substrate material (12) is melted during the weld in order to maintain the concentration of strengthening elements in the local melt within a zone of weldability. The spray deposition process may be a thermal process such as HVOF or a cold spray process. A groove (16) may be formed in a surface (10) of the superalloy substrate material to receive the weld strip. A diffusion heat treatment step may be used to improve adhesion between the weld strip and the superalloy material.

Abstract: An ink cartridge includes an ink bag for containing ink. The bag is sealed along the bottom to form a bottom seam and is sealed along the bag sides to form side seams. The cartridge includes a housing having first and second side walls defining a cavity for receiving the bag. A first compressible foam sheet is disposed in the cavity between one of the side walls of the housing and one of the walls of the bag and adjacent the side seams. A second compressible foam sheet is disposed in the cavity between the other side wall of the housing and the other bag wall and adjacent the side seams. The foam sheets supply a uniform distribution of pressure along the side seams of the bag as ink is withdrawn from the bag and expand to assist in the uniform delivery of ink from the bag.