Abstract: A system for precision temperature control of thermal bead baths used in biological laboratories to heat biological samples. An insulated outer shell and an inner shell sealed together to form a recirculation pathway. The inner shell has an air extraction port opening into the recirculation pathway and at least one air injection port opening into the recirculation pathway. A fan in the recirculation pathway draws air through the air extraction port. A thermal sensor is connected to a control and is disposed in close proximity to one of the air injection ports. Thermal beads are placed in a mesh basket inside the inner shell. The fan draws air from the inner shell through the beads and into the recirculation pathway, where the air is heated by a thermal element. The air flows past the thermal element and through the air injection ports back into the inner shell.

Abstract: The present invention relates to an evaporator and a thin film deposition system including the same. The evaporator according to an exemplary embodiment of the present invention includes a container including an evaporation space, a heater configured to heat the container, an inflow part configured to spray a liquid raw material into the evaporation space, and a rotor disposed in the evaporation space, the rotor configured to evaporate the liquid raw material.

Abstract: A device for carrying out a heat treatment method with a heat treatment liquid is disclosed. The device includes a working tank, which can be closed in a pressure-tight manner and designed as a hollow circular cylindrical. The interior of the working chamber has a process chamber for arranging material to be treated. The device includes a feed device for feeding a heat treatment liquid into the process chamber and a discharge device for discharging hear treatment liquid present in the process chamber. The device has a circulating device for circulating an amount of the heat treatment liquid within the process chamber for carrying out the heat treatment method. The device includes a heating device for heating the heat treatment liquid and a storage tank for temporarily storing substantially the entire amount of the heat treatment liquid. The storage tank is arranged completely in the interior of the working tank.

Abstract: Systems for heat treating materials are presented. The systems typically involve a fluidized bed that contains granulated heat treating material. In some embodiments a fluid, such as an inert gas, is flowed through the granulated heat treating medium, which homogenizes the temperature of the heat treating medium. In some embodiments the fluid may be heated in a heating vessel and flowed into the process chamber where the fluid is then flowed through the granulated heat treating medium. In some embodiments the heat treating material may be liquid or granulated heat treating material and the heat treating material may be circulated through a heating vessel into a process chamber where the heat treating material contacts the material to be heat treated. Microwave energy may be used to provide the source of heat for heat treating systems.

Abstract: An apparatus for thermally decomposing organic feedstock material utilizing a series of connected vessels. Each of the vessels is provided with an inlet and an outlet for transferring the organic feedstock material between the vessels. Separate heat exchangers are located between the inlet and outlet of each vessel. A catalyst material, such as a permeable mesh, is included between the inlet and outlet of each vessel to accelerate liquefaction of gaseous hydrocarbons.

Abstract: It is aimed to improve the heating efficiency of a poured raw material by efficiently creating a natural convection in a container. The interior of a container is constructed to have such a closed loop shape that a heating medium can be vertically circulated. A heated gas passage includes a lower heating section for heating the heating medium in a lower storage, and a lateral heating section for heating the heating medium, which was heated in the lower storage, in a first lateral section. A raw material is introduced to the heating medium which is flowing toward the lower storage in a second lateral section by being heated in the first lateral section, thereby promoting the circulation of the heating medium. In heat transferring pipes, the raw material is boiled to create drive forces for circulating the heating medium.

Abstract: A driving apparatus for a blast furnace charging distribution chute includes: a driving unit comprising a crankshaft connected to a motor to rotate with a variable rotational radius; a power transmission unit comprising a plurality of connection rods connected to the driving unit to linearly transmit power; and a working unit connected to the power transmission unit and fixed to circumference of a distribution chute to rotate or tilt the distribution chute.

Abstract: Systems for heat treating materials are presented. The systems typically involve a fluidized bed that contains granulated heat treating material. In some embodiments a fluid, such as an inert gas, is flowed through the granulated heat treating medium, which homogenizes the temperature of the heat treating medium. In some embodiments the fluid may be heated in a heating vessel and flowed into the process chamber where the fluid is then flowed through the granulated heat treating medium. In some embodiments the heat treating material may be liquid or granulated heat treating material and the heat treating material may be circulated through a heating vessel into a process chamber where the heat treating material contacts the material to be heat treated. Microwave energy may be used to provide the source of heat for heat treating systems.

Abstract: The invention provides a process for soldering in the vapor phase in which after the solder has melted onto the item to be soldered a vacuum is generated around the item to be soldered in the vapor phase. Also provided is a device for soldering in the vapor phase comprising a first chamber containing the vapor phase and, inside the first chamber within the vapor phase, a second chamber in which a vacuum can be generated and into which the item to be soldered can be introduced. A third chamber communicates with the first chamber to allow the item to be soldered to be transferred into the first chamber by means of a transporting system. The process and device according to the invention are advantageous in that they ensure soldered joints having a higher quality than those of the prior art.

Abstract: It is aimed to improve the heating efficiency of a poured raw material by efficiently creating a natural convection in a container. The interior of a container is constructed to have such a closed loop shape that a heating medium can be vertically circulated. A heated gas passage includes a lower heating section for heating the heating medium in a lower storage, and a lateral heating section for heating the heating medium, which was heated in the lower storage, in a first lateral section. A raw material is introduced to the heating medium which is flowing toward the lower storage in a second lateral section by being heated in the first lateral section, thereby promoting the circulation of the heating medium. In heat transferring pipes, the raw material is boiled to create drive forces for circulating the heating medium.

Abstract: A furnace for heat treating components, especially relatively long components such as main shafts of gas turbine engines, comprises means for mounting a number of components vertically and conveying them repeatedly around a circular path surrounding one or more heating elements, while simultaneously rotating the components about their vertical axes. This allows uniform heat treatment of the components, even when long treatment times are needed. Loading and unloading chambers adjacent to the main chamber permit automated loading and unloading of components without disturbing the environment within the main chamber.

Abstract: A heating apparatus in a color test machine comprises a rotary tumbler seat, a rotating shaft for turning the rotary tumbler seat, a heater for heating the rotary tumbler seat, and tumbler recesses provided in the rotary tumbler. It is characterized in that solid micro particles are used as heat transfer media for heating and preserving the heat.

Abstract: A condensation oven arranged to treat a workpiece including a casing having an internal structure defining a hermetic enclosure accessible via at least one door, a heater device operable to heat the internal structure to a predetermined temperature to enable a fraction of vapor obtained by vaporizing a heat transfer liquid to condense onto the workpiece, a vapor circulation system configured to circulate the vaporized liquid within the hermetic enclosure such that a fraction of the vapor condenses onto the workpiece, an extractor device operable to extract vapor within the hermetic enclosure of the oven, and a control unit configured to control the heater device and the extractor device when the at least one door is closed.

Abstract: A furnace includes a core tube that has an elongate boundary wall and is configured to accommodate wafers for processing the wafers in a treatment atmosphere. The furnace includes a cooling chamber defined between the elongate boundary wall and an outer casing of the furnace, wherein the outer casing includes a heating element and has first lateral, circumferentially spaced openings in proximity of a first end of the outer casing and second lateral, circumferentially spaced openings in proximity of a second end of the outer casing. Cooling gas is supplied through one of the first and second lateral, circumferentially spaced openings to a region of one end of the cooling chamber and provides for a cooling atmosphere. The cooling gas is guided along the cooling chamber with a uniform distribution of flow and discharged through one of the first and second lateral, circumferentially spaced openings from a region of an opposite end of the cooling chamber.

Abstract: The invention relates to a method of applying heat treatment to a workpiece by means of at least one heat transfer liquid having a boiling point at a given value.

Abstract: An oven which has a floor, a side wall extending upwardly therefrom to define a combustion chamber, and a top having an opening for combustion gases, a fuel support member mounted in a lower part of the combustion chamber, the fuel support member having a raised central portion with a downwardly and outwardly sloping top surface extending therefrom, and means for supplying fuel to the fuel support member. The oven includes an arrangement for providing primary air to the fuel on the fuel support member and for providing secondary air to an upper portion of the combustion chamber, the secondary air being arranged to impart a cyclonic motion to the combustion gases.

Abstract: A vertically oriented thermal processor for processing batches of semiconductor wafers held within a processing chamber. The processing chamber is contained within a processing vessel. Processing gases are discharged through a processing chamber outflow. An outflow cooler is included to cool gases exhausting from the processing chamber outflow. The outflow cooler includes a fluid heat exchanger and a flow diverter which directs the exhausting gases against cooled walls of the outflow cooler. The cooler also preferably has a liner which lines a casing to which the heat exchanger is connected.

Abstract: A method and system for calcining gypsum to recover gypsum in a form consisting essentially of calcium sulfate anhydrite is disclosed. The method includes the steps of feeding the ground gypsum material into a first kettle and heating the ground gypsum in the first kettle to the first predetermined temperature. The first predetermined temperature is preferably below 400.degree. F. so that the gypsum will still contain a sufficient amount of chemically-combined water so that it will self-fluidize by release of water vapor so that it will flow through the apparatus. The ground gypsum is then overflowed through at least one subsequent stage and heated to a final predetermined temperature to produce an anhydrite product. To produce insoluble calcium anhydrite or dead burn material, the final predetermined temperature is greater than 900.degree. F. and preferably within the range of about 900.degree. F.-1300.degree. F.

Abstract: A method and apparatus is disclosed for the continuous calcining of gypsum material in a high-efficiency, refractoryless kettle preferably heated by a multiple series of separate immersion tube burner coils, each coil operating within a specific calcining zone inside the kettle. The lowest, i.e., initial, burner tube coil is formed with a low profile to permit use of a small initial gypsum charge, and hence, a quick kettle start-up cycle. That low profile initial burner design also helps keep the agitator motor's load at a minimum during cycle start-up. Due to the immersion tube burner coil construction, no refractory structure for the kettle is required. Also, no separate hot pit structure is required, as the kettle is used to merely hold the material being calcined and no residual heat is present. A relatively thin kettle can be constructed, as it need only withstand relatively low operating temperatures.

Abstract: An improved vapor phase soldering machine includes a pair of separate vessels having an open fluid communication path in a wall separating the two vessels. The first vessel contains a liquid mixture of a primary vapor and a secondary vapor, while the second vessel contains a liquid mixture of the primary vapor and a tertiary vapor. Heating means continuously boils the two mixtures to create corresponding vapors within the vessels. The secondary vapor is disposed on top of the primary vapor in the first vessel, while the tertiary vapor is disposed on top of the primary vapor in the second vessel. The printed circuit board with surface mounted devices attached thereto by solder paste is introduced into the secondary vapor of the first vessel for preheating the board and the devices. Then, the board is moved into the primary vapor which is at a temperature high enough to melt the solder paste, thereby forming a bond between the devices and the printed circuit board.

Abstract: The described cleaning of work pieces, in particular printed circuit boards or assemblies, after the soldering, is performed by washing with an inert cleansing fluid which is maintained at a temperature slightly below the melting point of the solder. As a result, solvents for dissolving the impurities and soldering fluxes which are harmful to the environment can be dispensed with. This cleaning is particularly advantageous subsequent to the vapor phase soldering since the same fluid can be used for the cleansing fluid as for the heat transfer medium in the vapor phase soldering apparatus. Therefore, the problem of an unwanted mixing of different treatment media (on the one hand heat transfer medium and on the other hand cleansing fluid) does not arise.

Abstract: A process for the containment and recycle of organic vapors from an open container or tank that utilizes a chilled gas blanket over the surface of the organic liquid, with a continuous recirculaton of the chilled gas through a condenser heat exchanger for cooling the gas flow and condensing and returning the condensed vapor to the tank or container. Included are the means of distribution of the recirculated chilled gas, the means of collecting the recirculated chilled gas, the means of providing an enclosed chilled gas recirculation system, the apparatus for condensing the vapor to liquid, the apparatus for collecting and recycling the condensed vapor, the apparatus for providing a full open access to the top of the tank or container and the apparatus for control of the flow of the recirculated chilled gas.

Abstract: The invention concerns an improved method of calcining gypsum in which non-reactive hot gas is passed into contact with the gypsum from a source through a plurality of tubes extending downwardly into the gypsum. The invention also contemplates an improved apparatus which comprises a calcining kettle and a plurality of tubes connected to a common source of non-reactive hot gas and extending downwardly into the kettle and having openings in their lower regions to release the hot gas into the contents of the kettle. The invention provides a method and apparatus which produces gypsum plaster of improved quality and with less insoluble anhydrite.

Abstract: The level of vapor generated by heaters located in boiling electronic liquid contained in a vessel is maintained at a first level below the path of travel of work product and is elevated to a second level above the work product to process the work product. After a selected processing time the vapor level is lowered to the lower level so that the work product will not be overheated.

Abstract: Particulate solids material contaminated with volatile vaporizable fluids are treated by an apparatus comprising an elongated inclined housing having a hollow conveyor screw disposed therein for rotation to move material from a lower inlet end of the housing to an upper inclined end of the housing for discharge through a bottom outlet opening. The conveyor screw is constructed from a hollow hub member having an upper open end and a lower end with a plurality of openings for conveying heat exchange pebbles or spheres from the upper end of the housing to the lower end through the interior of the hub. A combustor is disposed within the interior of the hub for generating combustion gasses which heat the conveyor screw and the heat exchange pebbles prior to entry of the pebbles into mixing with the material being conveyed through the apparatus.

Abstract: The invention provides an improved apparatus for use in processing wet scrap textile glass fiber into a dry flowable powder. The apparatus includes a unique inlet and outlet structure to prevent clogging during operation. The apparatus also includes a unique discharge unit for ground dry glass fines composed of a pair of rod gratings place proximate the outlet of the apparatus.

Abstract: Aluminothermic heating blocks for use in heating metal objects, such as rails, and methods for their manufacture are disclosed. The blocks are made by setting a mass of particulate aluminum, iron oxide, heat absorbing material, alkali metal silicate binder and water.

Abstract: An apparatus for fixing electronic parts to a printed circuit board is disclosed which comprises a vapor generating tank or boiling and generating a thermal medium and a returning tank for receiving the thermal medium containing flux. The vapor generating tank and the returning tank are separated from each other. By utilizing the level difference between the vapor generating tank and the returning tank, the thermal medium is charged into a flux separator and discharged therefrom. Thus, the mixture of the flux into the thermal medium may be reduced and its maintenance work may readily be carried out, thereby reducing a running cost of the apparatus.

Abstract: A thermopulse apparatus for deburring parts has a hollow body (1) housing a working chamber (2) in such a manner as to define a space (7) between the outer walls (6) thereof and inner walls (4) of the body (1) for liquid (8) partly filling the space. The chamber (2) has spark plugs (9), an inlet valve (20), an exhaust valve (12) mounted in the bottom part of the chamber (2) along the longitudinal axis (16) thereof under the layer of liquid (8), and a covermember (13) for accommodation of the parts (14) being treated, the convermember being reciprocatable within the chamber (2). Ports (23 and 32) respectively are provided in the side walls (22) of the valve (12) and in the covermember (13) on the side of the valve (12).

Abstract: An apparatus has a cylindrical working chamber (2) with a bottom member (7) provided with admission and discharge valves (3,5) and a spark plug (4). The bottom member (7) is made as a hollow cylinder having end plates and openings (8), the height and outside diameter of which are approximately equal to the height and inside diameter of the working chamber (2). Sealing rings (11, 12) are interposed between the chamber (2) and the hollow cylinder.

Abstract: An apparatus for thermal deburring of parts has a working chamber (6) with a bottom member (3), an inlet valve (8), a spark plug (9) and an outlet valve. The latter is made in the form of a rod (10) having a through passage (11), one end of the passage communicating with the interior of the chamber (6) and the other end being disposed in a vessel (1) containing a liquid (2) and surrounded by an annular cooling chamber (13).

Abstract: Apparatus for melting by vapor-phase treatment a solder applied to an object. The liquid serving for vapor production, which is situated in a vessel, is heated by electrical heating means which are disposed exclusively outside of the vessel and are completely enveloped by a liquid heat-carrying medium. The vessel floor is provided with projections to increase the thermal transfer. A tubing coil is furthermore disposed in the heat-carrying medium for rapid cooling thereof.

Abstract: An apparatus for vaporizing a liquid and condensing the vapor includes at least one chamber in which the liquid is vaporized and in which the vaporized liquid is condensed. The vaporizing chamber contains a heat emitting device providing a surface temperature above the vapor temperature for substantially instantaneously vaporizing the liquid condensate maintaining a predetermined vapor level in the vaporizing chamber, and a heat absorbing device for condensing the vaporized liquid.

Abstract: The main object of the invention is the limiting of corrosion in vapor-phase reflow soldering machines. Liquid chlorine and fluorine are used in the device for soldering in vapor phase. The decomposition of these elements by heat releases ions which, when brought in the presence of water, form hydrofluoric acid and hydrochloric acid. These acids corrode the tank through which the soldering method is used as well as the metallic elements of the soldered components. The device which is the object of the present invention eliminates water from the secondary liquid by isolating the vapors of these liquids from the atmosphere, preventing water from penetrating into the water-removal cartridge and providing for the water-removal process before fresh secondary liquid is brought into use. The invention applies mainly to reflow soldering in vapor phase.

Abstract: Improvements to machines for heating articles or products by condensation of primary vapor on said products or articles, the primary vapor isolated from the atmosphere by a secondary vapor mass. According to the invention, a first improvement is aimed at lowering the chlorine and fluorine ion contents in the primary and secondary vapors of the plant resulting from the decomposition of said vapors. To this effect, the invention provides an improved washing of the secondary liquid. Furthermore, a dry gas sweeping between damp atmospheric air and the secondary vapor prevents the introduction of atmospheric moisture. Another improvement relates to the automatic compensation of variations in operating conditions by controlling the power balance.

Abstract: A vapor tank for processing a product by heating the same through exposure to vapor serving as a heat transfer medium. The vapor tank includes at least one partition wall separating a vapor chamber filled with vapor and a heating chamber for processing the product by heating the same for supplying a sufficient saturated vapor to the product. The partition wall is formed with openings for allowing the saturated vapor to be injected therethrough from the vapor chamber into the heating chamber where the product is enveloped by the saturated vapor. The vapor tank is provided with a recovery device for recovering the vapor flowing out of the tank through an inlet and an outlet for introducing and discharging the product into and out of the tank with a high degree of vapor recovering efficiency and with a minimum loss of energy. The vapor tank is also provided with a mechanism for externally supplying air currents to prevent the vapor from flowing out of the tank through the inlet and the outlet.

Abstract: A machine for heat-treating articles or products with solvent vapors of the in-line type which comprises a tunnel, displacement means for conveying the articles of products to be heated from the inlet of the tunnel to its outlet and, in the following order, a first chamber for the condensation of a secondary vapor, a second chamber for the vaporization of a secondary liquid and for the complementary condensation of a primary vapor, a third chamber for heating the article or product to be heated and which is filled with the primary vapor, a fourth chamber for the vaporization of secondary liquid and for the complementary condensation of the primary vapor, and a fifth chamber for the condensation of the secondary vapor. The chambers have a cross-section larger than that of the tunnel, and are distributed along the tunnel and are interconnected by sections of the tunnel. The machine is efficient, with there being little or no loss of solvent vapors during use.

Abstract: An apparatus for the thermal removal of lacquer and like coating materials from metal and ceramic objects comprises a fluidized-bed retort which is partly heated by a burner in a burner chamber formed in a unitary housing with the retort. Combustibles in the retort gases are recycled to an afterburner chamber for combustion to provide additional heating for the retort. The bottom of the retort is surrounded by an annular gap through which the afterburner gases pass and then to an outlet connected to the afterburner chamber by a valve.

Abstract: A method and an apparatus for drying or heat treating granular material fed in a continuous flow. The apparatus comprises a heating container having an inlet end and an outlet end. A heating source is located entirely within the container. An auger conveyor is disposed in the container adjacent the inlet end to displace a particulate medium, capable of retaining heat, from the inlet end to a heat chamber within the container. A transporting mechanism is provided in the heating chamber for showering the particulate medium in direct contact with a flame during a predetermined time so that the medium is quickly heated to an approximate desired temperature. A mixing and drying conveyor mixes and conveys the heated particulate medium with a humid granular material whereby to dry the material by heat transfer between the particulate medium and the granular material. A separator then separates the particulate medium from the granular material.

Abstract: In reheating and conveying a granular heat carrier, such as sand, which is transportable by a gas and is used for desorption by heating a charged lumpy adsorber, such as activated carbon pellets, the sand is passed upwardly in a cylindrically shaped pipe element in the form of a fluidized bed. The sand is heated during its upward passage through the fluidized bed. Air introduced into the lower part of the pipe element is used as the fluidizing medium and also as combustion air. Further, fuel is supplied into the lower part of the pipe element. From the upper end of the pipe element, the heated sand flows downwardly by gravity to a sand separator, where it is separated from flue gas, into a desorber where it is contacted by the absorbent and then into a device for separating the sand and the adsorbent so that the sand can be returned into the lower end of the pipe element.

Abstract: An apparatus for the thermal removal of lacquer and like coating materials from metal and ceramic objects comprises a fluidized-bed retort which is partly heated by a burner in a burner chamber. Combustibles in the retort gases are recycled to an afterburner chamber for combustion to provide additional heating for the retort. The bottom of the retort is provided with a layer of refractory heat-storage material which serves as a thermal buffer leveling the heating of the interior of the retort.

Abstract: Apparatus for heating a plastic pipe 18 or the like comprises a body portion having inner and outer parts 1,2 defining therebetween an annular cavity 3 which receives the end of the pipe. In use of the apparatus, hot fluid is pumped through the cavity 3 via flow passages 7-11 whereby to heat the pipe 18 sufficiently e.g. for moulding purposes. The fluid is prevented from escaping from the open end of the cavity 3 by means of compressed air supplied via ports 15.

Abstract: A fixed-bed charge in a tube reactor is heated, and at the same time heat is conducted away from, or into, the fixed bed, by a method in which the fixed bed is heated by means of a fluidized material which conducts away and supplies heat and flows through the voids in the charge, and the heat is conducted away or supplied by means of a heat-transfer medium flowing in a heat exchanger, the latter being located in the fixed bed or in a fluidized layer formed above the fixed bed and consisting of the fluidized material.

Abstract: In reheating and conveying a granular heat carrier, such as sand, using a carrier gas, where the heat carrier may be utilized for desorption by heating a charged lumpy adsorbent, the heat carrier is circulated through a vertically arranged cycle loop. Initially the heat carrier is conveyed from a carrier gas inlet at the lowermost part of the loop to a separator at the uppermost point. After separation, the heat carrier flows downwardly under the effect of gravity through the loop passing, in turn, through a heater, a desorber where it is mixed with the adsorbent, and another separator where it is separated from the adsorbent, before the carrier returns to the carrier gas inlet for repeating the cycle. If sand is used as the heat carrier it can be conveyed upwardly through the loop by compressed air.

Abstract: The present invention involves an apparatus and method for heat treating metal workpieces in chemically controlled environments produced by decomposition of an atmosphere precursor, e.g. methanol or ethyl acetate, introduced to a heated fluidized bed retort as a vapor.

Abstract: Cold, wet gypsum is admixed to a moving bed of hot solid particles of a heat-retaining material. The mixture is fed to a moving bed type drier where it is agitated while the released vapors are withdrawn. After discharge from the drier, dry gypsum is separated from the heating particles and the latter are recirculated into a heater. Preferably, flue gases from a combustion chamber are employed for heating the particles, which are preferably in the form of steel balls.

Abstract: The present invention involves an apparatus and method for heat treating metal workpieces in chemically controlled environments produced by decomposition of an atmosphere precursor, e.g. methanol or ethyl acetate, introduced to a heated fluidized bed retort as a vapor.

Abstract: A method of dehydrating metal pieces including immersing the pieces in an oil heated to or above the boiling point of water for a time to boil off the water and then removing the pieces from the oil. An apparatus for the dehydration of metal pieces includes a container for carrying the pieces to be dehydrated, a receptacle for holding oil in which the chips are to be immersed, means for heating the oil to or about the boiling point of water, and means for introducing the container into the receptacle to immerse the pieces in the oil and removing the container and pieces from the oil.

Abstract: A process and apparatus for drying or heating a particulate material by means of heat transfer media which is brought into direct contact with the particulate material within a continuously rotating cylindrical drum. The particulate material flows in one general overall direction through the drum and the heat transfer media flows in a generally opposite direction through the drum. The particulate material is subjected to heat treatment by repeatedly coming into direct and immediate physical contact with the heat transfer media in the course of flowing through the drum while it is subsequently separated from the heat transfer media per revolution of the drum.

Abstract: A condensation soldering facility (10) comprised of a housing (12) having a divider member (22) therein which separates the housing into a drying chamber (24) in an upper section and a soldering chamber (26) in a lower section. A transfer member (76) is pivotably mounted within the drying chamber (24) to receive articles (112--112) to be soldered through an access door (71) in the top of the drying chamber (24) and arcuately transfer the articles through an access door (44) in the divider member (22) to solder the articles in the soldering chamber (26).