Abstract: The present application is applicable to the field of material making, and there is provided a baking method, device and baking oven including: acquiring a predetermined instruction, and starting timing and cycling the following steps: controlling a first set of pins to support a substrate from an initial position and recording the rising times of the first set of pins; raising the first set of pins to a first preset position, and controlling the first set of pins to move a first preset distance in a first preset direction, wherein the first preset distance is associated with the rising times of the first set of pins; controlling the lowering of the first set of pins such that a second set of pins supports the substrate; and controlling the first set of pins to return to the initial position, when the first set of pins drops to a second preset position.

Abstract: Provided is a hearth roll for supporting and conveying a steel sheet in a continuous annealing furnace, wherein all of a shaft portion and a roil main body are made from one or more ceramic materials, preferably constituted with concentric ceramic layers of different ceramic materials centering on the rotation shaft of the roll. The hearth roll has not only an excellent pickup resistance but also a long roll life free from maintenance for long periods. Also provided is a continuous annealing facility using the hearth roll in at least one of a heating zone, a soaking zone and a cooling zone.

Abstract: An integral metal end cap for use in a conveyor roll assembly is suitable for use in an environment subject to significant temperature variation. The metal end cap comprises a first end connectable to rotary means, and a second end comprising an integral body adapted to fit over the end of a ceramic spool. The integral body contains a torque transmission portion having a plurality of deformable strips enabling transmission of torque during temperature variations. A conveyor roll assembly comprises a ceramic spool having a longitudinal axis and, at least at one end of the ceramic spool, a metal end cap as described.

Abstract: In one embodiment, a case transfer apparatus includes a base, a feeding device having a first end tapering to a second end that is coupled to the base, a motor disposed on the base, a rotatable feed wheel assembly disposed on the base and coupled to the motor, the rotatable feed wheel assembly adapted to receive at least one case via gravitational force from a feeding device, and a roller plate coupled to the motor and disposed adjacent the rotatable feed wheel assembly within a case receiving region where the at least one case is rotated and heated.

Abstract: A belt-roll fuser system includes a belt-roll fuser module that is movable to engage and disengage to a main frame of the belt-roll fuser system. The belt-roll fuser has an internal pressure member that defines a fusing nip with an external pressure member of the main frame when the belt-roll fuser module is engaged. The belt-roll fuser module is movable by a latch, and when engaged, a nip load path crosses through a point at which the latch attaches to the belt-roll fuser module.

Abstract: A roller for in-furnace conveyance (1) which is provided with a fitting section (30) in which a fitting hole (11) of a body section (10) and a fitting shaft (24) of a shaft section (20) are fitted, and which constitutes a single roller by welding of the fitting section, wherein the fitting section has a first fitting section (31) in which fitting occurs with a prescribed interstice at a position separated from the weld position, and a second fitting section (32) in which fitting occurs with an interstice larger than that of the first fitting section at a position adjacent to the weld position.

Abstract: A heat-sensitive adhesive label manufacturing device has a thermal head for heating and thermally activating the heat-sensitive adhesive layer of a heat-sensitive adhesive sheet, and a platen roller for conveying the heat-sensitive adhesive sheet between the platen roller and the thermal head to transport the heat-sensitive adhesive sheet in a transport direction. At least one discharge roller is disposed on a downstream side of the thermal activation section and is configured to undergo rotation at a peripheral speed different from a peripheral speed of the platen roller to convey the heat-sensitive adhesive sheet in the transport direction. A guide member is disposed opposite and spaced apart from the at least one discharge roller to provide a space therebetween along which the heat-sensitive adhesive sheet is conveyed by the at least one discharge roller without being sandwiched between the at least one discharge roller and the guide member.

Abstract: A furnace roller assembly is provided with a helically shaped shaft-offset and metal product contact surface assembly wound around a furnace roller shaft. A corebuster may be provided within the furnace roller shaft to direct the flow of a coolant within the axial length of the furnace roller shaft and through a cooling element forming a part of the shaft-offset and metal contact surface assembly.

Abstract: There is provided a system and method for heating at least one workpiece in a furnace by which the workpiece is heated by heating facilities. An exemplary method comprises heating a complete workpiece with the heating facilities. The exemplary method also comprises moving the workpiece out of the furnace such that a first portion of the workpiece is still inside the furnace while a second portion of the workpiece is outside the furnace and holding the workpiece at this position for a predetermined time period. Finally, the exemplary method comprises moving the complete workpiece out of the furnace.

Abstract: The invention concerns a roller (R), used in continuous product heating furnaces for handling and conveying steel products and in particular slabs. The associated apparatus includes a cooled central shaft (1), cooled by a liquid. On the shaft are mounted a plurality of discs (2), for supporting the products (3) to be transported, arranged perpendicularly to the longitudinal geometrical axis of the roller (R), spaced apart along the axis of the roller (R) and separated by an insulating sleeve (4). The insulating sleeve (4) is maintained at each longitudinal end by at least one cold component (5) secured to the shaft (1) and cooled by the shaft, with axial play (Ja) between the sleeve (4) and the shaft (1) such that possible sagging of the shaft (1) may occur in use without causing substantial mechanical stress on the insulating sleeve (4) and the heat transferred from the sleeve (4) to the shaft (1), and from the discs (2) to the sleeve (4) is limited.

Abstract: A substrate transport system adapted for transporting a substrate moving in a substrate transport direction in a processing chamber is provided. The substrate transport system includes a plurality of transport rollers each having a transport shaft and a transport wheel. The transport shaft and the transport wheel are adapted for supporting the moving substrate. A heating means is arranged between the position of the moving substrate and the transport shaft and is adapted for heating the moving substrate.

Abstract: A hearth roll apparatus for feeding a strip sheet in an annealing furnace is disclosed. The hearth roll apparatus includes a ceramic tube which is provided inside the annealing furnace to contactingly feed a strip sheet, a roll shaft which is coupled to a first end of the ceramic tube and extends across the annealing furnace through the ceramic tube, a tube fixing sleeve which is coupled to a second end of the ceramic tube and through which a portion of the roll shaft is inserted, and a tension generating unit which interlocks with the roll shaft and the tube fixing sleeve and supplies a tensile force for stretching the roll shaft in a longitudinal direction. Accordingly, thermal deformation like creep buy which the roll shaft is bent down is minimized, and a line speed of the strip sheet can be increased by high-speed rotation of the hearth roll.

Abstract: Conveyor rolls used in high temperature applications, and an end cap assembly for such rolls. The conveyor roll comprises a ceramic spool, an end cap and a tolerance ring. The end cap contains a metal ferrule and has an internal circumference adapted to fit over an end of the ceramic spool. A tolerance ring is interposed between each end of the ceramic spool and the end cap. The tolerance ring is composed of resilient metal having a plurality of circumferentially arranged corrugations. The conveyor roll can resist temporary overheating or blockage without damage.

Abstract: The present invention refers to an improved burning system for industrial furnace burners (16), more specifically for tunnel type furnaces for firing ceramic materials, to improve the thermal efficiency and reduce the consumption by these furnaces in the process of firing load (10) such as floor tiles, tiles, sanitary material, refractories, porcelain, insulators, grindstone, tableware ceramic, red ceramic and ceramic in general, by a using flame rotation system, providing a radiant flame surface by dividing the flame into smaller intermittent flames.

Abstract: A furnace roller assembly is provided with a helically shaped shaft-offset and metal product contact surface assembly wound around a furnace roller shaft. A corebuster may be provided within the furnace roller shaft to direct the flow of a coolant within the axial length of the furnace roller shaft and through a cooling element forming a part of the shaft-offset and metal contact surface assembly.

Abstract: An accelerated and simple-to-realize fast method for thermally converting metallic precursor layers on any desired substrates into semiconducting layers, and also an apparatus suitable for carrying out the method and serving for producing solar modules with high efficiency are provided. The substrates previously prepared at least with a metallic precursor layer are heated in a furnace, which is segmented into a plurality of temperature regions, at a pressure at approximately atmospheric ambient pressure in a plurality of steps in each case to a predetermined temperature up to an end temperature between 400° C. and 600° C. and are converted into semiconducting layers whilst maintaining the end temperature in an atmosphere comprising a mixture of a carrier gas and vaporous chalcogens.

Abstract: In drying of a glass substrate to which a coated film is applied, the heating and drying is conducted while feeding means 10, 18, which always moves on a lower surface of the glass substrate 6 to which the coated film is applied, abuts against the substrate, in order to solve a problem that when the lower surface of the coated film is supported for a long time, supporting traces occur and thereby quality of the glass substrate is reduced. With this configuration, traces of the pin 11, 12, 21 are less likely to occur.

Abstract: There is provided a system and method for heating at least one workpiece in a furnace by which the workpiece is heated by heating facilities. An exemplary method comprises heating a complete workpiece with the heating facilities. The exemplary method also comprises moving the workpiece out of the furnace such that a first portion of the workpiece is still inside the furnace while a second portion of the workpiece is outside the furnace and holding the workpiece at this position for a predetermined time period. Finally, the exemplary method comprises moving the complete workpiece out of the furnace.

Abstract: A roller conveyor roll for the transport of furnace-heated metallic strip or a continuously cast steel strand has a shaft extending along an axis, a tubular shell coaxially surrounding the roller shaft and having a pair of axially spaced ends, and a respective insulating body at each of the shell ends between the respective shell and the shaft and angularly fixed to the shell and to the shaft for transmitting torque between the shaft and the shell ends. The bodies electrically and thermally insulate the shell from the shaft.

Abstract: A device for heating objects and a method that has recourse to the device, particularly for heating and/or bending one or more glass panes positioned one on top of the other, covering each other. The device includes a furnace line, plural supports, particularly transport molds that transport and/or bend the objects, the objects being placed on the supports positioned on transport carriages, a drive device that progresses the transport carriages through the furnace line and plural heating elements provided above the objects in the furnace line. In the device the heating elements are positioned on the whole above the entire furnace line and the heating elements can be operated and regulated so as to form heating zones suited to dimensions of the objects.

Abstract: A roller-conveyor roll for the transport of furnace-heated metallic strip or a continuously cast steel strand has a shaft extending along an axis, a tubular shell coaxially surrounding the roller shaft and having a pair of axially spaced ends, and a respective insulating body at each of the shell ends between the respective shell and the shaft and angularly fixed to the shell and to the shaft for transmitting torque between the shaft and the shell ends. The body electrically and thermally insulates the shell from the shaft.

Abstract: A driving apparatus for rollers of roller hearth furnaces includes a bearing beam module having a mounting plate for fixing to a side wall of the roller hearth furnace. The mounting plate has at least one passage opening for receiving a drive journal for driving one of the rollers. At least one mitre gear unit fixed to the mounting plate is provided and its angle drive is connected by the drive journal to the roller to be driven. At least one first and one second rotary coupling piece are accessible from the outsides of a casing of the mitre gear unit and are provided for connecting the angle drive to two further mitre gear units for driving in each case one adjacent roller.

Abstract: A roller conveyor roller for furnace-heated metal strip has a roller shell journaled on a shaft with bearings providing thermal and electrical insulation of the shell from the shaft. The shell can be divided into shell segments each of which can have two bearings. One of these bearings can be a conical bearing with conical rings and with rollers which are thermally and electrically insulating.

Abstract: The invention relates to an apparatus for supporting material to be treated in continuously operated thermal treatment furnaces, wherein the support of the material is carried out by means of support elements external to the furnace, and where the material is made to proceed at a high velocity, said apparatus comprising at least two elements for supporting the material and a member for supporting the support element, as well as means for cooling the support element. According to the invention, the support element comprises at least one rotation support member provided with a turnably installed tightening element, and at least one actuator arrangement for making the support element rotate essentially at an equal circumferential velocity as the proceeding direction of the material.

Abstract: A Conveyor furnace for firing pipe-shaped objects with the following characteristics: 1.1.1 a furnace floor, 1.1.2 a furnace ceiling, 1.1.3 a two lateral furnace walls, which connect the furnace floor with the furnace ceiling, forming a furnace channel, 1.2 the furnace floor has at least one opening running in the axial direction of the furnace channel, 1.3.1 at least one transport unit that extends from a motor section below the furnace floor through the opening to a transport section in the furnace channel, and 1.3.2 which can be driven along the opening, 1.4 the transport section is designed to hold, in a horizontal position, at least one pipe-shaped object, 1.5 in the furnace channel below at least one part of the object to be fired, which is freely achievable, a device is arranged, onto which the object first rolls up, with its freely achievable part, and then rolls down.

Abstract: There is provided a cast tire for use with a furnace roller. The cast tire has at least three of annular spaced pockets located around the central opening of the tire on each radial side. When the tires are installed on a furnace roller with arbor means, pockets are inserted into the annular spaced pockets. The pockets are secured only to the arbor means of the roller. Rotation of the arbor means results in rotation of the cast tires by transmission of torque from the pockets to the to the tire without direct attachment of the tire to the arbor means.

Abstract: A tunnel or reheat furnace roller assembly includes a hollow tube or arbor of low alloy steel and an inner concentric tube for providing a flow of cooling water. About the exterior of the tube or arbor is cast a surround or jacket having larger diameter, spaced apart wheels which engage and support workpieces in the furnace and integrally formed intermediate smaller diameter regions. The integral surround is preferably cast of Waspaloy or other high temperature, nickel alloy steel.

Abstract: A vertical heat treating furnace for passing a metal strip, therethrough for heat treatment and a hearth roll applied to a heating/soaking furnace of the vertical heat treating furnace are disclosed. The hearth roll can be configured such that the taper angle of each of first taper sections continuous to a flat section at a central portion of the hearth roll from a roll axial direction is larger than the taper angle of each of second taper sections continuous to each of the first taper sections from the roll axial direction. The length Lc (mm) of the flat section and the length L1 (mm) of the first taper section can satisfy the following relationships: 0.5 Wmin≦Lc≦Wmin and Wmin≦Lc+2×L1≦Wmax−400, where Wmin is the minimum width (mm) of the metal strip, and Wmax is the maximum width (mm) of the metal strip.

Abstract: A boiler tube protector having a cylindrical or semi-cylindrical shape and adapted to be attached around an outer peripheral face of a boiler tube with mortar, which boiler tube protector includes a plurality of ceramic bodies closely arranged along their parting planes, wherein the parting planes includes a restraining portion for restraining slippage of each of the ceramic bodies.

Abstract: A gudgeon or endcap for a heated roller is provided which substantially reduces heat loss through the ends of the roller and is of sufficient strength and durability to transmit rotation to the rollers during extensive use. The gudgeon is molded from thermoplastic polyimide filled with 20 to 50 weight percent glass fiber. A roller comprising the gudgeon is also provided.

Abstract: This device comprises: two pairs of lateral flanges rotatably mounted respectively on a shaft pivoting in the frame of the furnace, each pair of flanges receiving a strip support roll by the agency of removable fastening means; means for driving said pairs of lateral flanges, ensuring that their angular displacement is synchronized during the interchange operations; central buffer provided with raising means, which is designed to shut off the orifice provided in the hearth of the furnace, for carrying out the operations of discharging a roll outwards from the furnace containment at the end of an interchange operation; two raisable buffers, one for each support roll, which may be displaced in a vertical translational movement in order respectively:to ensure the sealing of the orifice provided in the hearth of the furnace during the roll interchange phase;to ensure that the rolls are supported when the roll bearings are demounted in order to remove the inoperative roll from the corresponding flanges, andto carr

Abstract: The two piece rider assembly consist of a base piece that is welded to the skid pipe of a steel slab reheat furnace and a top piece that is removably attached to the base piece. The base piece has a cut out slot divided into three sections. The center section has strait walls and the front and back sections have walls that slope into the cut out to reduce the cross sectional distance. The cut out is open at the front section. The top piece has two protrusions with dove tail looking cross sections that fit into the front and back sections of the cut out slot of the base piece. The tip of the dove tail protrusion is wider than the neck of the cut out slot in the base piece so that upward movement is prevented when they are engaged. The protrusions are separated by at least the distance of the front section of the cut out slot of the base piece.

Abstract: A dry furnace roll design operates at a high temperature environment of a metal heating furnace by arranging weld metal joining a roll sleeve to roll bells at opposite ends in cavities formed in the sidewalls of the furnace. A dense filling of ceramic fiber material is held in each roll bell underlying the weld connection with the roll sleeve by discs. Ceramic fiber material is put into the cavity of the sidewall and held in place by a keeper plate. The masses of weld metal joining the roll sleeve to the roll bells are comprised of TIG weld metal formed in an inert gas. Multi-pass welding is performed while supporting the roll assembly during the welding operation at an angled relation to the horizontal. The roll is rotated in the angled relation to allow the deposition of weld metal in multiple passes and in an accurately controllable manner preferably by the use of a microprocessor to control the positioning of weld electrode.

Abstract: Heating and/or temperature-maintaining furnace (11) for slabs (35), which includes lateral intake (12a) and outlet (12b) roller conveyors the axis of which is at a right angle to the axis of movement of the slabs (35) within the furnace (11), the roller conveyors (12a-12b) consisting of a plurality of roller-bearing bogies (13) able to move at a right angle to the axis of the roller conveyors (12a-12b), the roller-bearing bogies (13) having a first maintenance/replacement position (13a) outside the furnace (11) and a second working position (13b) in which they cooperate with the inside of the furnace (11), means being also included for the movement of the slabs (35) in the furnace (11), the rollers (10) being supported at both their ends on the roller-bearing bogies (13) by supporting means (19) and being driven by appropriate motor means (21), the supporting means (19) and motor means (21) being located outside the furnace (11) when the roller-bearing bogies (13) is brought to its second working position (13

Abstract: Furnace for coils installed in a rolling line for wide plate or sheet in an intermediate position between the roughing train and the finishing train, the furnace including at least an inlet (25) and at least an outlet (26) respectively associated with at least a feeding way (12a) and at least a discharge way (12b) for the coils (11), the furnace being defined inside by a plurality of positioning stations (14) defining a substantially central transit channel (15) cooperating at the lower part with means (24) to lift and move the coils (11) step by step between the positioning stations (14), each of which positioning stations (14) comprising support means (118), the support means (118) of at least a desired number of positioning stations (14) located towards the outlet (26) of the furnace (10) including at least a first lowered working position (18a) where the lifting and moving means (24) cooperate with the coils (11) and at least a second raised working position (18b) where the coils (11) are in a position of

Abstract: Apparatus is disclosed for moving and thermally conditioning generally cylindrical containers in which the structure provides for movement of the containers about their axes and provides for a predetermined heat flow relative to the containers to change the temperature of the containers by a predetermined amount. The apparatus may be used for cooling of hot containers or for both heating the containers for sterilization and then subsequent cooling, if desired.

Abstract: A hearth roll with a cermet thermal spray coating on the roll surface which is composed of a heat resistant MCrA1Y (M: Fe, Ni, Co) alloy where the amount of A1 is below 10 at. % and the combined (Al+Cr) amount is between 13-31 at. % and at least one oxide ceramic from the group consisting of MgO, MgAl.sub.2 O.sub.4, and Y.sub.2 O.sub.3.

Abstract: The invention relates to a steam-heated roll and a roll body having a central bore and peripheral axially parallel drilled passages for guiding the steam, and having at least one bolted-on flange pin with a central bore and connecting passages between the central bore of the flange pin and the ports of the peripheral drilled passages of the roll body at the flange pin, which is characterized by the connecting passages branching from the central bore of the flange pin in the flange pin to a plurality of ports of the peripheral drilled passages.

Abstract: A composite gudgeon or endcap for a heated roller is provided which comprises a metal portion and a polymer portion. The gudgeon substantially reduces heat loss through the end of the roller and is of sufficient strength to support and transmit rotation to the roller.

Abstract: The kiln with displaceable frames, designed to contain also manufactured articles of considerable mass avoiding any direct contact between them and the motor rollers which causes thickenings, is provided with a formation of short transverse, non-through, rollers (22), distributed in two opposite rows to define at least one plate of transport, said rollers extending in an overhanging manner towards the inside of the lateral walls of the kiln; a loading frame (28), rectangular or square, constituted by a pair of stringers (29) connected rotationally to the internal ends of said rollers and interconnected by transverse elements (30) for supporting the manufactured articles to be treated, is introduced into the kiln and guided by lateral surfaces; the kiln is used in industries in which drying or firing of manufactured articles, for instance ceramic articles such as sanitary apparatus, is made.

Abstract: One aspect of this invention comprises an improved conveyance system comprises an endless flexible belt which circulates through at least two arcs, at least one gripping member attached to the belt, the gripping member having a free end and an anchoring end, and a biasing means which biases the anchoring end of the gripping member toward the surface of the conveyor belt, wherein the gripping member is open as it traverses an arced path and is closed as it traverses a straight path. A workpiece is loaded as the gripping member traverses the first arc, and offloaded as the gripping member traverses the second arc, Preferably, the first arc has a greater radius than the second arc. The inventive also comprises a heater utilizing the conveyance system.

Abstract: An apparatus and method suitable for the continuous curing of pasted battery plates. The apparatus includes a hydroset oven having an atmospherically controlled hydroset chamber in which a continuous transport conveyor is mounted. Pasted plates are automatically loaded onto the transport conveyor and moved continuously through the hydroset chamber. Plenums are positioned in the hydroset oven chamber adjacent to the transport conveyor to direct temperature and humidity controlled air over the battery plates to affect hydrosetting. Additional hydroset ovens may be provided depending on the quantity of battery plates being processed. The apparatus also includes a drying oven containing a continuous transport conveyor. The drying oven is arranged in series with the hydroset oven to receive the hydroset battery plates and dry them in a continuous process.

Abstract: A heating furnace system is provided for receiving finite lengths of workpieces from one or more continuous casters and form a supply of heated workpieces at a temperature suitable for rolling in a hot rolling mill. The system includes, in one aspect, a holding furnace receiving a workpiece during continuous casting until it is severed by a cutoff device to prevent unwanted cooling. The workpiece is fed from a holding furnace to a heating furnace wherein it is deposited onto one of a series of vertically spaced supports in a heated section where it remains static throughout the heating process. After heating the workpiece is removed from the stationary supports and returned to rollers of a hearth for discharge from the furnace to a rolling mill. In a second embodiment the holding furnace arrangement provides for separate holding furnaces to receive continuous castings from separate continuous casters and prevent unwanted cooling of the cast workpiece until cut to a finite length.

Abstract: Coiler furnaces of the type used with reversing rolling mills are provided with a strip guide for guiding the leading edge of the incoming steel strip into engagement with the slot in the winding drum of the coiler furnace. According to the present invention, the strip guide is designed as a dual purpose strip guide provided with a cleaning element (e.g. a scraper blade or abrasive element) fixed to the distal end of the strip guide for contacting and cleaning the exterior cylindrical surface of the winding drum when the coiler furnace is otherwise idle.

Abstract: A billet live roller bed upstream of cooling beds, where conveyor rollers designed in a worm or screw shaped manner and arranged to be parallel to the roller bed rollers transfer the rolled materials transversely to the conveyance direction onto the cooling bed, can be adapted to changing rolling speeds with small resources in machining technology, if the transverse conveyor rollers have screw turns with different pitches.

Abstract: The roller exhibits a support body which is provided with a plurality of support disks. Insulating layers are arranged between the support disks. A heat-resistant cable surrounding the support body in several coils is embedded in each insulating layer. The insulating layer consists of fiber material which is sprayed on at the same time as the cable is wound around the support body. The cable provides a firm and lasting connection of the insulating layer to the support body.

Abstract: Roll designs for roller hearth furnaces operating at temperatures ranging from under 1200.degree. C. to substantially higher are disclosed. A rotary mounted main roll body may be provided with a plurality of spaced tires for contacting and transporting a charge carried by the roll. An internal coolant circulation system is provided within the main roll body. Insulation may be provided around the main roll body.

Abstract: A heating furnace system is provided for receiving finite lengths of workpieces from one or more continuous casters and form a supply of heated workpieces at a temperature suitable for rolling in a hot rolling mill. The system includes, in one aspect, a holding furnace receiving a workpiece during continuous casting until it is severed by a cutoff device to prevent unwanted cooling. The workpiece is fed from a holding furnace to a heating furnace wherein it is deposited onto one of a series of vertically spaced supports in a heated section where it remains static throughout the heating process. After heating the workpiece is removed from the stationary supports and returned to rollers of a hearth for discharge from the furnace to a rolling mill. In a second embodiment the holding furnace arrangement provides for separate holding furnaces to receive continuous castings from separate continuous casters and prevent unwanted cooling of the cast workpiece until cut to a finite length.

Abstract: A roll system for a roller hearth furnace for thin slab casters is disclosed. The roll system includes a plurality of fluid cooled rolls rotatably mounted in the furnace configured to contact and at least partially support a charge transported along a pass line through the furnace. An upper surface of each of the fluid cooled rolls is positioned along the pass line. A plurality of dry rolls is rotatably positioned within the furnace wherein at least one dry roll is positioned between each pair of adjacent fluid rolls. The upper surface of each of the dry rolls is positioned below the pass line.

Abstract: Roll designs for roller hearth furnaces operating at temperatures ranging from under 1200.degree. C. to substantially higher are disclosed. A rotary mounted main roll body may be provided with a plurality of spaced tires for contacting and transporting a charge carried by the roll. An internal coolant circulation system is provided within the main roll body. Insulation may be provided around the main roll body.