Abstract: A fuel nozzle is provided. The fuel nozzle includes a nozzle body, a plurality of swirler vanes, and at least one outlet. The nozzle body includes a back plate, a front plate, and a mixing zone defined therebetween. The back plate includes at least one inlet defined therein and the front plate includes at least one discharge defined therein. The plurality of swirler vanes are positioned between the back plate and the front plate and spaced circumferentially about the mixing zone. Each of the plurality of swirler vanes direct air obliquely into the mixing zone. The at least one outlet is defined within at least one of the nozzle body and the plurality of swirler vanes, the at least one outlet configured to inject fuel into said mixing zone.

Abstract: A fan assembly for creating an air current includes a bladeless fan assembly including a nozzle and a device for creating an air flow through the nozzle. The nozzle includes an interior passage and a mouth receiving the air flow from the interior passage. A Coanda surface located adjacent the mouth and over which the mouth is arranged to direct the air flow. The fan provides an arrangement producing an air current and a flow of cooling air created without requiring a bladed fan, that is, the air flow is created by a bladeless fan.

Abstract: A method of manufacturing a nozzle assembly may include the step of over molding a nozzle housing, or a portion of a nozzle housing, onto at least one nozzle component, such as an injection tube. Nozzle assemblies and flow cytometers incorporating nozzle assemblies may include any combination of straight smooth injection tubes, improved features for securing a nozzle assembly, improved features for debubbling a nozzle assembly, and aggressive orienting geometries. A method of sorting cells may include the step of magnetically coupling a nozzle assembly with a flow cytometer.

Abstract: A method of manufacturing a nozzle assembly may include the step of over molding a nozzle housing, or a portion of a nozzle housing, onto at least one nozzle component, such as an injection tube. Nozzle assemblies and flow cytometers incorporating nozzle assemblies may include any combination of straight smooth injection tubes, improved features for securing a nozzle assembly, improved features for debubbling a nozzle assembly, and aggressive orienting geometries. A method of sorting cells may include the step of magnetically coupling a nozzle assembly with a flow cytometer.

Abstract: In a centrifuge nozzle a nozzle body defines an inlet in fluid communication with a nozzle outlet. The nozzle body is adapted to be releasably positioned in an aperture defined by a centrifuge bowl assembly. A camming portion projects outwardly from the nozzle body and defines a surface frictionally engageable with a portion of the bowl assembly. The nozzle body also defines a male mounting portion for slidably engaging a complimentarily shaped female slot defined by a nozzle insertion and extraction tool. The outlet of the nozzle is located adjacent to the male mounting portion.

Abstract: Provided is an exclusive operation control apparatus which, when input operations of a plurality of users compete with each other, displays a content on which the plurality of input operations are reflected, instead of performing only one of the input operations. An operation determination section receives input information from the plurality of users, and determines an operation. An exclusive operation determination section determines an exclusive operation concerning a new operation by using the new operation and a previous operation. The content copying section copies the content based on a result of the determination. The content management section receives the new operation from the operation determination section and, when the new operation is an operation on the copied content, generates and displays on a display device display data which is obtained by reflecting the new operation on the copied content.

Abstract: A nozzle assembly is provided. The nozzle assembly includes at least one stationary nozzle. An outer ring having a predefined shape includes at least one groove defined therein and the groove is configured to receive at least a portion of the stationary nozzle therein. A coupling portion is formed integrally with the stationary nozzle or the outer ring such that the coupling portion extends outwardly therefrom. An attachment member is coupled to the coupling portion to facilitate substantially restricting movement of the stationary nozzle when the outer ring is substantially distorted.

Abstract: A cartridge block for screening a multilayer ceramic with a conductive paste includes a threaded paste cartridge attachment located at a top of the cartridge block, the threaded paste cartridge attachment being configured to receive a paste cartridge containing the conductive paste; a paste routing section, the paste routing section located underneath the threaded paste cartridge attachment, the paste routing section comprising a flared section located at a bottom of the cartridge block, the paste routing section being configured to receive the conductive paste from the threaded paste cartridge attachment and route the paste through the flared section.

Abstract: Variable length flush nozzles for wire electric discharge machining (wire EDM) are provided. The variable length flush nozzle comprises an elongated body having an internal channel and a nozzle head having a pair of opposed slots formed therein. The nozzle head is coupled to the elongated body by a retention element dimensioned and configured for operative engagement with the pair of opposed slots such that the nozzle head is slidable relative to the elongated body between a fully extended position in which the variable length flush nozzle is at a maximum length and a fully retracted position in which the variable length flush nozzle is at a minimum length.

Abstract: An annular injector is described. The injector includes a first bayonet assembly and a second bayonet assembly each including a terminal end and a tip end. The second bayonet assembly is configured to be concentrically coupled at least partially about the first bayonet assembly. An outer diameter of the first bayonet assembly and an inner diameter of the second bayonet assembly vary at the tip end to define a first substantially annular nozzle. The first bayonet assembly includes a maximum outer diameter that is greater than a minimum inner diameter of the second bayonet assembly and at least a portion of at least one of the first bayonet assembly and the second bayonet assembly extends from the tip end to the terminal end. The injector includes a third bayonet assembly configured to be concentrically coupled at least partially about the second bayonet assembly to define a second substantially annular nozzle.

Abstract: A spray nozzle assembly (10) comprising a cap (30) which houses an inner assembly of nozzle inserts (40). The cap (30) is threadably engaged by complementary threads (31, 21) to a nozzle body (20). The nozzle body (20) and the cap (30) are therefore able to be mated in a controllable axially compressive relationship in which the threadable connection enables a large amount of finely controlled axial tensile or compressive force to be applied in either moving the cap (30) and nozzle body towards each other or away. It should be noted, however, that seat (70) restrict the extent of axial travel of the screwable parts (20, 30, 40) relative to and towards each other. This facility enables strong unwanted adhesive forces of glue-like or set flowable material to be broken so that the cap (30), insert assembly (40) and nozzle body (20) can be moved apart for servicing.

Abstract: A fuel nozzle assembly for use with a turbine engine is provided. The fuel nozzle assembly includes a tube assembly that includes a plurality of openings, wherein the tube assembly is configured to channel at least a first type of fuel through the turbine engine. A plurality of fasteners are removably coupled to the tube assembly such that each of the fasteners are severally removable from the tube assembly to enable a plurality of different types of fuel to be channeled through the turbine engine for operation of the turbine engine.

Abstract: An article comprising a substrate; a bond layer disposed on the substrate; a first reinforcing layer disposed on the bond layer, the first reinforcing layer comprising a plurality of nanoparticles; and a protective layer disposed on the first reinforcing layer, wherein the first reinforcing layer reduces formation of thermally grown oxide generated at the bond layer, and methods of making the same.

Abstract: In an atomizer constructed to cool inlet air for a gas turbine by spraying fine droplets of water into the inlet air, a spray nozzle is disposed to spray the finely atomized droplets of water from an outer edge of an atomized airstream into a high-speed zone thereof, towards a central region of the airstream. The atomized airstream meets an airstream of a low-speed zone formed at a downstream side, and after the two kinds of airstreams have been mixed and unified, this mixture is supplied to an axisymmetric compressor. Devices such as a feed water pipe and spray nozzle are placed in the low-speed zone so as not to obstruct the airstream.

Abstract: A flow inlet element (22) for a chemical vapor deposition reactor (10) is formed from a plurality of elongated tubular elements (64, 65) extending side-by-side with one another in a plane transverse to the upstream to downstream direction of the reactor. The tubular elements have inlets for ejecting gas in the downstream direction. A wafer carrier (14) rotates around an upstream to downstream axis. The gas distribution elements may provide a pattern of gas distribution which is asymmetrical with respect to a medial plane (108) extending through the axis.

Abstract: The present application relates to a cold effect applicator tip for cosmetic products, characterized in that the applicator tip is made of a plastic material comprising organic fillers, metallic fillers or a mixture of both. The present application also relates to a container for cosmetic products with a cold effect applicator tip is also provided, comprising a reservoir to contain a cosmetic product and an applicator tip such as above described.

Abstract: A hairdryer includes a handle; a body comprising a fluid outlet and a primary fluid outlet; a fan unit for generating fluid flow through the hairdryer, the hairdryer comprising a fluid flow path extending from a fluid inlet through which a fluid flow enters the hairdryer to the fluid outlet, and a primary fluid flow path extending from a primary fluid inlet to the primary fluid outlet; a heater for heating the primary fluid flow drawn through the primary fluid inlet; and a nozzle attachable to the body, the nozzle comprising a nozzle fluid inlet for receiving the primary fluid flow from the primary fluid outlet, and a nozzle fluid outlet for emitting the primary fluid flow, and wherein the nozzle is configured to inhibit the emission of the fluid flow from the fluid outlet.

Abstract: This invention refers to innovative water sprays applications to significantly improve coal and quartz dust control around a continuous miner. Significant dust control is achieved through utilizing different types of sprays at locations on the top and sides of the miner chassis to create water curtains or shrouds of water around zones of high dust concentration and zones of high concentration dust transport. This is called “multiple lines of defense” spray system (MLD.) This invention also provides a method of reducing dust around a continuous miner by configuring a spray system, located at the top or sides of the cutter boom, thereby improving control of respirable dust.

Abstract: An apparatus for a component rework nozzle includes a nozzle with a proximal end spaced apart from a distal end along an axis. The proximal end is sized to partially enclose a component during a component rework process. The component is disposed on a substrate by way of a plurality of solder joints. The apparatus includes an indentation defined in a side of the nozzle. The side of the nozzle is parallel to the axis. The indentation is shaped to maintain a separation between the nozzle and a neighboring component. The neighboring component is disposed adjacent to the component on the substrate. The apparatus includes a plurality of notches disposed on the proximal end of the nozzle. The plurality of notches are formed to balance heat distribution, during the component rework process, across the component.

Abstract: A nozzle assembly includes a nozzle having a trailing edge of an outer band and an anti-rotation pin slot. Also included is a retaining ring extending circumferentially about the outer surface of the outer band, wherein the retaining ring includes an anti-rotation pin and an anti-rotation pin hole, wherein the anti-rotation pin is configured to fittingly reside in an axial orientation within the anti-rotation pin slot and the anti-rotation pin hole. Further included is a seal plate seated on the outer surface of the outer band and configured to retain the anti-rotation pin. Yet further included is a washer disposed within a bored portion of the seal plate, wherein the bored portion is aligned with an aperture within the retaining ring, wherein a mechanical fastener extends into the retaining ring through the bored portion to operably couple the seal plate to the retaining ring.

Abstract: A supplying device including a supplying part and an adjustment part is provided. The supplying part includes a run-through supplying path for transporting a fluid. The adjustment part includes a channel and one or more recovery paths adjacent to the channel. The supplying part is disposed in the channel to allow the fluid to flow out of the channel through the supplying part and to allow the recovery paths to suck a portion of the etching solution outputted from the channel in order to control the amount of output of the fluid. Wet-etching equipment including the supplying device is also provided.

Abstract: A radial nozzle assembly for use in a pressure vessel to enable fluid flow through the vessel wall is provided. The radial nozzle assembly has a nozzle and a cup-shaped flange extending from one end of the nozzle. The nozzle has a bore disposed therethrough along its length to permit fluid flow through the wall of the pressure vessel. The flange is defined by a generally cup or dome-shaped wall having an open end. The nozzle assembly is secured to the wall of the vessel such that the nozzle is disposed in a radial orientation to the flange and possibly in a horizontal orientation.

Abstract: An evaporator includes a vaporization chamber having a monomer inlet and a vapor outlet. There is a vapor nozzle in the vapor outlet. The evaporator also includes a collar positioned between the vaporization chamber and the vapor nozzle which increases the pressure in the evaporation chamber while the conductance through the nozzle is substantially unchanged.

Abstract: A spray nozzle includes a tubular channel extending along a longitudinal axis, a slot formed by two approximately plane surfaces converging in a direction of the channel and located on either side of a plane including the longitudinal axis of the channel, and a dome connecting the channel and the slot wherein a length of the dome represents less than 50% of a largest transverse dimension of the channel and a plane cross section of the dome is symmetric and it is defined by at least two different circular arcs.

Abstract: A washing apparatus with an adjustable water spraying head includes a water inlet tube, a water guiding tube and a water spraying head. A second connecting base of the water guiding tube engages with a first connecting base of the water inlet tube. A plurality of first positioning holes that are against a first positioning unit of the water inlet tube are circularly formed at the engaging side. The water spraying head is plugged into a water outlet end of the water guiding tube, and a second positioning unit is located at outer periphery of a connecting tube. The second positioning unit is against a second spring and wedged in a second positioning hole of the water guiding tube. According to the structure stated above, the adjustment of the water spraying head is more convenient without frequently moving the water inlet tube, which causes water randomly spraying.

Abstract: An ejector device for ejecting droplets of fluid onto a surface includes an ejector mechanism attached to a fluid reservoir through a fluid loading plate that is configured to pierce the reservoir and channel the fluid to a rear surface of the ejector mechanism by capillary action. The ejector mechanism may have a centro-symmetric configuration with a lead free piezo actuator and may be covered by an auto-closing cover.

Abstract: The invention discloses a coating apparatus for coating slurry on a substrate. The coating apparatus comprises: a container for storing the slurry; a slurry pushing means connecting with the container through a discharging pipe; a coating head connecting with the slurry pushing means through another discharging pipe and connecting with the container through a feed-back pipe, and a controlling valve provided within the feed-back pipe. The coating head comprises: a coating slit; a discharging concave; a feed-back concave; a separator provided between the feed-back concave and the discharging concave; and an extending concave for correspondingly covering and matching with the discharging concave and the feed-back concave. The discharging concave and the feed-back concave are respectively provided with a discharging aperture and a feed-back aperture for respectively connecting with the discharging pipe and the feed-back pipe.

Abstract: A blow gun includes a body with a top path and a bottom path, and a volume adjustment device is installed between the top and bottom paths. The volume adjustment device is in contact with a press rod which has one end pivotably connected to the body. The opening of the press rod is controlled by operation of the volume adjustment device so as to change the volume of the pressurized air. The press rod can also be locked at a position so that it is not activated unintentionally.

Abstract: A method, an installation and a nozzle for suppressing the generation of iron-containing vapor during filling or emptying of a container for an iron-containing metal melt with the aid of CO2 snow, a CO2 snow jet being applied by means of the nozzle dispersing in a substantially planar manner onto a surface of an iron-containing stream which is poured into or out of the container. The invention consequently at least partially solves the technical problems outlined in connection with the prior art. In particular, a device is proposed which allows cost-effective and space-saving suppression of the generation of iron-containing vapor during the filling or emptying of a container with the aid of a reduced CO2 snow quantity.

Abstract: A glue-dripping needle structure includes a needle body. The needle body includes glue storage cylinder portion and a connection seat portion. The glue storage cylinder portion has an open end and a closed end. The outer surface of the closed end is provided with a plurality of needle heads and protrusions. When in use, the needle heads and the protrusions are perpendicular to a lens module to be processed. Through the plurality of needle heads disposed around the closed end of the glue storage cylinder portion, the glue drips on the periphery of the lens module evenly. There is no need to move the needle body for dripping glue many times. The present invention provides a stable glue-dripping, without worrying about deflection of glue, much glue or less glue.

Abstract: In one embodiment, a component for dispensing a fluid includes: a plurality of fluid ejection orifices arrayed in a plane; and an elongated bumper extending along one side of the array generally in a plane intersecting the plane of the array and the bumper having a protruding exterior surface that includes a first part inclining away from the array and a contiguous second part inclining back toward the array.

Abstract: A faucet has a hollow main body. The main body has a mounting section, an extending section, at least one inlet and a passage. The mounting section has a top and a bottom. The extending section is mounted securely on the top of the mounting section and has an extending direction and at least one elongated outlet. The at least one elongated outlet is formed in the extending section and has a maximal length along the extending direction of the extending section. The at least one inlet is formed in the bottom of the mounting section. The passage is formed in the main body and communicates with the at least one elongated outlet and the at least one inlet. Because the elongated outlets are elongated along the extending direction of the extending section, an efflux from the elongated outlet can conform to hands of users and enhance washing efficiency.

Abstract: An outlet of a spigot has a bottom seat, a neck, a head and a flow passage. The bottom seat has a bottom face. The neck is formed on and protrudes upward from the bottom seat. The head is formed on and protrudes forward from the neck and has a bottom side. The flow passage is formed in the outlet between the bottom seat, the neck and the head and has at least one inlet hole and an outlet hole. The inlet hole is formed through the bottom face of the bottom seat and communicates with the flow passage. The outlet hole is U-shaped, is formed in the head opposite to the neck and communicates with the flow passage.

Abstract: An injection nozzle (10), especially for injecting liquid fuel, preferably crude oil, into the combustion chamber of a gas turbine, includes an inner chamber (16) which extends along a nozzle axis (19), conically tapers to a concentric nozzle orifice (17), and to which the medium which is to be injected is fed from outside through a plurality of inlet ports (18) which are arranged in a distributed manner around the nozzle axis (19). The inlet ports (18) are oriented perpendicularly to the nozzle axis (19) and each lead tangentially into the inner chamber (16). With such an injection nozzle, an improved spray cone is achieved by the fact that a pin (14), which extends in the axial direction, is concentrically arranged in the inner chamber (16) and passes through the region of the mouths of the inlet ports (18) and extends right into the nozzle orifice (17).

Abstract: Described is an atomizing nozzle having a relatively small frontal area permitting insertion of a nozzle into small diameter medical conduit(s). A body of a preferred nozzle has a characteristic size (e.g., cross-section diameter) of less than about 0.2 inch (0.5 cm). The nozzle body is typically carried on an extension member, which can be transversely flexible to permit passage of a nozzle body through a tube and along a nonlinear path. The nozzle body is typically connected to an extension member by way of a lap joint associated with the nozzle body. Preferred embodiments have a De/O ratio of less than 12.0, a Db/O ratio of less than about 18, and a Db/De ratio of less than about 1.1. Certain embodiments include a swirling chamber disposed upstream of the ejection orifice and having a proximal wall with a portion configured to at least approximate a portion of a dome, or other curved surface.

Abstract: A resin-bonded body of a fuel injection apparatus includes a first resin material and a second resin material, which are bonded together and have different properties, respectively. The resin-bonded body has a fuel seal portion to limit leakage of fuel from a boundary surface between the first resin material and the second resin material to an outside. The fuel seal portion is formed in a portion of the boundary surface and is surface-modified to increase hydrophilicity of the fuel seal portion.

Abstract: The invention includes a triangular or trapezoidal attachment nozzle for a straw extender tube used with aerosol foaming canned products. The invention also includes a foam distribution assembly system comprising the nozzle, an aerosol can, and a straw extender tube and a method for distributing foam product using such system. When the extender tube is correctly inserted, and the aerosol can is discharged, the foam from the can travels from the aerosol can through the extender tube, and then into the triangular or trapezoidal nozzle. The foam then fills an interior expansion space in the nozzle that gradually widens, and exits the nozzle at its widest point. As it exits the nozzle, rather than being a cylindrical shape, the foam exits in a rectangular sheet shape, which is more fitting for applications such as applying insulation.

Abstract: In a method of producing trench-like depressions (24) in the surface of a wafer (27), particularly a silicon wafer, by plasma etching, in which the depressions (24) are produced by alternate passivation and etching, each depression (24) in its final geometry is provided with a protective layer (30) of the polytetrafluoroethylene type.

Abstract: A nozzle for spraying a liquid, comprising a central body which comprises a connecting portion for connecting the nozzle to a supply of liquid, an atomizing portion forming droplets of the liquid, and a liquid supply pipe forwarding liquid to the atomizing portion. The nozzle further comprises a sleeve mounted on the central body, the sleeve comprising a central aperture, which at least partly encloses the atomizing portion of the central body, and a spray angle controlling rim which at least partly encircles the atomizing portion.

Abstract: A solid stream nozzle providing an extend throw-distance achieved by reducing boundary layer effects within the nozzle bore and/or by accelerating peripheral regions of the ejected stream in order to help maintain cohesion of a free liquid stream without appreciable dispersion. The method includes generating a high-pressure fluid source, supplying the nozzle with high pressure; reducing boundary layer effect within the nozzle bore, and optionally, accelerating and/or inwardly re-directing the peripheral boundary of the ejected stream with a secondary higher pressure, higher speed fluid source. The apparatus includes a high pressure fluid source, a nozzle bore, a bleed ring within the nozzle bore to strip off a boundary layer, and optionally, a secondary higher pressure fluid source at the nozzle tip to accelerate and/or inwardly re-direct the ejected fluid stream.

Abstract: A retractable pipe structure of an air blow gun includes an extension pipe, a lock unit and a blow pipe. The extension pipe has a through hole therein for insertion of the blow pipe. The lock unit includes a connection member. One end of the connection member is connected to the extension pipe. The other end of the connection member is connected to a lock member. An elastic collet and a seal member are provided in the lock member. The end of the connection member has an inner inclined surface which is inclined inward. Because the inner inclined surface guides the seal member and the elastic collet pushes the seal member, the seal member is deformed to tighten the blow pipe and to seal the extension pipe. The elastic collet can clamp the blow pipe and won't damage the blow pipe.

Abstract: An ejector has a primary inlet (40), a secondary inlet (42), and an outlet (44). A primary flowpath extends from the primary inlet to the outlet. A secondary flowpath extends from the secondary inlet to the outlet. A mixer convergent section (114; 300; 400) is downstream of the secondary inlet. A motive nozzle (100) surrounds the primary flowpath upstream of a junction with the secondary flowpath. The motive nozzle has a throat (106) and an exit (110). An actuator (204) is coupled to the motive nozzle to drive a relative streamwise shift of the exit and convergent section.

Abstract: In a feed dilution system and method for a thickener or settling tank, a feed pipe nozzle has an outlet opening or orifice configured to generate an initial stream of slurry from the feed pipe into an upstream end of a mixing conduit wherein the stream is extended from a first side of the mixing conduit to a substantially opposite second side in a first direction transverse to the mixing conduit so as to enhance entrainment of dilution fluid flow into the slurry stream and concomitantly produce a substantially uniform solids concentration across a stream flowing from the mixing conduit into the feedwell. The outlet opening is generally shaped asymmetrically towards a third side of the mixing conduit in a second direction transverse to the mixing conduit so as to bias the initial stream of slurry towards the one side, where the second direction is substantially perpendicular to the first direction.

Abstract: A method for determining irrigation time across an area with a predetermined size S and based on desired precipitation quantity Q and precipitation rate P. The irrigation setup has a fluid output LPH?S*P. The new irrigation time TNEW is defined as TNEW=Q/PDRY. PDRY is a representative sampling precipitation average based on an indicative percentage PR of lowermost precipitation measurements selected out of a plurality of precipitation measurements taken across the area S.

Abstract: A process for producing powder green compacts includes centrifugally compacting a slip containing a material powder, a binder resin and a dispersion medium in a mold, into a compact containing the material powder and the binder resin. A process for producing sintered compacts includes sintering the green compact. A powder green compact contains a material powder and a binder resin, the binder resin being present between particles of the material powder and binding the material particles. A sintered compact is obtained by sintering the green compact.

Abstract: A dispensing head for emitting an atomized spray of liquid droplets includes an actuator and a nozzle insert. The actuator includes a gas duct and a liquid duct and may be attached to a container housing a propellant gas and a liquid product. The nozzle insert includes at least one modular structure that can be installed in an actuator socket on the actuator. The nozzle insert includes a pressure cap defining a pressure chamber having an exit orifice. A liquid conduit is disposed in the pressure chamber and defines a liquid supply channel having a liquid supply channel exit opening. The nozzle insert is configured to form a reflux cell in the liquid supply channel upstream of the liquid supply channel exit opening to achieve flow blurring interaction between the liquid product and the gas propellant.

Abstract: An atomizer device for use in discharging a liquid into or on the body of the patient, the device having reusable and disposable components designed to safely and automatically prevent pathogens contamination.

Abstract: Provided is an adapter configured for use with an aerosol can spray nozzle and an extension tube. The adapter is configured to fit onto the spray nozzle and to receive the extension tube to provide a more rigid and fluidly secure connection between the spray nozzle and the extension tube. The adapter includes a spray nozzle portion and an extension tube portion. The spray nozzle portion includes an opening sized and configured to allow the spray nozzle to be insertable therein to create frictional engagement therebetween. The extension tube portion includes an inner channel extending therethrough, and is sized and configured to allow the extension tube to be insertable therein to create friction-tight engagement between the extension tube and the adapter.

Abstract: A device and method for delivering water to a person who is unable to reach household or other types of water dispensing faucets. In some embodiments, the device comprises a trough for delivering the liquid and an attachment member for attaching the trough to a faucet.

Abstract: A graphite nozzle is combined by stacking a plurality of graphite tubes together, applied in polysilicon refining cyclic vacuum equipment or used as a lining of fireproof or refractory material, where each graphite tube includes a upper coupling portion and a lower coupling portion, the upper coupling portion is positioned on a top face of a upper side of the graphite tube; and the lower coupling portion is positioned on a bottom face of a lower side of the graphite tube, and corresponds to the upper coupling portion, allowing the upper coupling portion of each graphite tube to be propped against the lower coupling portion of another graphite tube; the graphite tubes are fused and coupled together by means of a sintering treatment after the graphite tubes are stacked together.