Abstract: A method for producing a machining segment for a machining tool, where the machining segment is connectable to a basic body of the machining tool by an underside of the machining segment, includes producing a green body by placing first hard material particles in a matrix material in a defined particle pattern, where the first hard material particles are placed in the matrix material with a respective projection with respect to the matrix material. The green body is compacted by pressure between a first press punch, which forms the underside, and a second press punch, which forms an upper side of the machining segment, to form a compact body, where the upper side is opposite from the underside. The compact body is processed by temperature or by infiltration to produce the machining segment.

Abstract: A method for producing a machining segment for a machining tool, where the machining segment is connectable to a basic body of the machining tool by an underside of the machining segment, includes producing a green body by placing first hard material particles in a matrix material in a defined particle pattern, where the first hard material particles have a projection with respect to the matrix material. The green body is processed by hot pressing under temperature and pressure between a first press punch, which forms the underside, and a second press punch, which forms an upper side of the machining segment, to form the machining segment, where the upper side is opposite from the underside.

Abstract: A method for producing a machining segment for a machining tool, where the machining segment is connectable to a basic body of the machining tool by an underside of the machining segment, includes producing a green body by placing first hard material particles in a first matrix material in a defined particle pattern. The green body is compacted by pressure between a first press punch, which forms the underside, and a second press punch, which forms an upper side of the machining segment, to form a compact body. The compact body is processed by temperature or by infiltration to produce the machining segment. The second press punch has depressions in a pressing surface where an arrangement of the depressions corresponds to the defined particle pattern of the first hard material particles.

Abstract: A method for producing a green body for a machining segment, where the machining segment is connectable to a basic body of a machining tool by an underside of the machining segment, includes placing first hard material particles in a matrix material in a defined particle pattern. The first hard material particles are placed in the matrix material with a respective projection with respect to the matrix material.

Abstract: A method for producing a machining segment for a machining tool, where the machining segment is connectable to a basic body of the machining tool by an underside of the machining segment, includes producing a green body by placing first hard material particles in a first matrix material in a defined particle pattern and processing the green body by hot pressing under temperature and pressure between a first press punch, which forms the underside, and a second press punch, which forms an upper side of the machining segment, to form the machining segment, where the upper side is opposite from the underside. The second press punch has depressions in a pressing surface and an arrangement of the depressions corresponds to the defined particle pattern of the first hard material particles.

Abstract: A method of producing a machining segment, in which a green body (51) is constructed from a machining zone (54), wherein the machining zone (54) is produced from a first metallic powder material (56) and hard material particles (58), the green body (51) is compacted under pressure with a compression pressure to result in a compact body and the compact body is sintered thermally at a sintering temperature to result in the finished machining segment, wherein the machining zone (54) is produced by layer-by-layer application of material layers of the first metallic powder material (56) and particle layers of the hard material particles (58), wherein the hard material particles (58) in one particle layer are placed into the previously applied material layer of the first metallic powder material (56).

Abstract: A drill ring for a cylindrical core drill bit is disclosed. The drill ring includes at least two ring segments which are constructed from a sintered powder mixture and diamond particles. The diamond particles are arranged on ablation tracks in a plane perpendicular to the cylinder axis and the ring segments are connected to each other on their lateral edges.

Abstract: A method for producing a drill ring for a core drill bit is disclosed. The method includes constructing at least two green parts from encapsulated diamond particles, the diamond particles being covered by a powder mixture. The green parts are formed into ring segments under the effect of pressure and the ring segments are annularly assembled and sintered under temperature action to form a continuous drill ring.

Abstract: A method for manufacturing a continuous drill ring for a core drill bit is disclosed. The method includes forming at least two green compacts in layers in a direction of formation between a bottom side and a top side by successively applying powder layers containing a powder mixture and diamond layers containing diamond particles that are arranged in a set pattern, shaping the green compacts into ring segments under the effect of pressure, sintering the ring segments under the effect of heat, and combining the sintered ring segments in a circular manner and joining the same in a frictionally engaging or integrally bonding manner at the lateral edges thereof so as to obtain the continuous drill.

Abstract: A method for manufacturing a continuous drill ring for a core drill bit is disclosed. The method includes forming at least two green compacts in layers in a direction of formation between a bottom side and a top side by successively applying powder layers containing a powder mixture and diamond layers containing diamond particles that are arranged in a set pattern. The green compacts are shaped into ring segments under the effect of pressure. The ring segments are joined in a circular manner and they are sintered under the effect of heat so as to obtain a continuous drill ring.

Abstract: An apparatus for microsurgical needle suture attachment includes a clamp for holding a needle such that the needle aperture remains in a fixed position; at least one guide member defining an angled guide area having a relatively wide portion and a vertex portion, the vertex portion being aligned with the fixed position of the needle aperture; a transport mechanism for advancing a suture end portion into the relatively wide portion of the guide member(s); and a deflection spring for moving the suture end portion into the vertex portion of the angled guide area.

Abstract: A process for tipping surgical sutures includes dispensing tipping agent one drop at a time and contacting the suture portion to be tipped with the drop of tipping agent. A transversely oriented lifting/wiping string may be used to lift the suture into contact with the drop and may wipe away excess tipping agent. Alternatively, a transversely oriented string may be used to catch a drop and then place the drop onto the suture. The tipping agent absorbed into the tipped portion can then be cured and cut to provide a tipped suture. The tipping process and apparatus can be used in conjunction with a needle-suture assembly process. The process advantageously controls application of a droplet of tipping agent to minimize the amount of tipping agent used, thereby providing an aesthetic needle-suture attachment. Apparatus are disclosed for performing the process.

Abstract: An apparatus for microsurgical needle suture attachment includes a clamp for holding a needle such that the needle aperture remains in a fixed position; at least one guide member defining an angled guide area having a relatively wide portion and a vertex portion, the vertex portion being aligned with the fixed position of the needle aperture; a transport mechanism for advancing a suture end portion into the relatively wide portion of the guide member(s); and a deflection spring for moving the suture end portion into the vertex portion of the angled guide area.

Abstract: A process for tipping surgical sutures includes dispensing tipping agent one drop at a time and contacting the suture portion to be tipped with the drop of tipping agent. A transversely oriented lifting/wiping string may be used to lift the suture into contact with the drop and may wipe away excess tipping agent. Alternatively, a transversely oriented string may be used to catch a drop and then place the drop onto the suture. The tipping agent absorbed into the tipped portion can then be cured and cut to provide a tipped suture. The tipping process and apparatus can be used in conjunction with a needle-suture assembly process. The process advantageously controls application of a droplet of tipping agent to minimize the amount of tipping agent used, thereby providing an aesthetic needle-suture attachment. Apparatus are disclosed for performing the process.

Abstract: A process and apparatus for transporting micro-mechanical parts, for example surgical needles, on a liquid surface by holding the parts on the liquid surface on account of the surface tension of the liquid, such that a predetermined path is formed and subjecting the parts to an external force thereby transporting the parts along the predetermined path.