Abstract: A roller for a roller hearth furnace, the roller including a water-cooled, rotatably mounted carrying axle on which a plurality of support rings are arranged at a spacing from one another. In the axial region between and next to the support rings, the carrying axle is provided with insulation composed of a fiber material and configured with protection of the outer circumference of the fiber material from the environment. In the case of insulation constructed from ring-shaped punched parts, the insulation arranged in the axial region between and next to the support rings is composed of circular or ring-shaped punched fiber parts. The protection is configured as ring-shaped insulating disks composed of a more resistant material than that of the punched fiber parts, and at least one punched fiber part is provided in each case between two insulating disks.

Abstract: System and method for depositing a first layer on a flexible strip-shaped or sheet-shaped substrate and a second layer on the first layer. The system comprises a first deposition unit of a first type which is provided with a first supporting body, a conveying device for conveying the substrate in a conveying direction which extends parallel to a first central line of the first supporting body along the radial outer side of the supporting body. Downstream of the first deposition unit, the system furthermore comprises a second deposition unit which is provided with a second supporting body with a second central line which is in line with the first central line, and a wrapping device for keeping the substrate in a wrapped state, the substrate being wrapped around at least a part of the radial outer sides of the first supporting body and of the second supporting body.

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: 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: 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 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 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, where the supporting of the material is realized by means of support elements installed externally to the thermal treatment furnace, in the vicinity of the orifice of the furnace, said apparatus comprising at least two support elements that are installed movably, so that the mutual positions of the support elements can be adjusted by means of a drive arrangement of the support apparatus. According to the invention, in connection with the housing element used for supporting of the support elements, there is installed at least one gas flow control element which enables the flowing of the gas used for treating the material between the support element and the control element, said control element also constituting part of the sealing of the thermal treatment furnace.

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: A furnace roller for transporting of a continuously cast stock of a continuously casting plant through a temperature equalizing and heating furnace and including a rotatable arbor supported outside of the furnace and having cooling medium channels provided in its interior, a plurality of tires supported on the arbor and forming a transporting plane for the transported stock, at least one clamping ring provided between a tire and the arbor and formed of metal or alloy having a maximum possible thermal conductivity and susceptible to both cold and hot deformation, and at least one steel sleeve provided sidewise of the clamping ring.

Abstract: A water-coolable furnace roller for conveying goods to be transported through a roller hearth heating furnace has a shaft supported external to the furnace and driven in rotation. The shaft has an outer contact surface. Support rings having a receiving bore, respectively, are arranged with the receiving bore on the shaft, wherein the support rings form a conveying plane. The receiving bore has an inner contact surface, and at least one of the inner and the outer contact surfaces has a shape of a polygon contour of substantially constant diameter with fitting surfaces defining an orbiform curve.

Abstract: A roller for use in a fuser assembly of a reproduction apparatus adapted to operate at an elevated temperature up to in the range of approximately 750° F. The roller includes a generally elongated substantially cylindrical tube. End gudgeons are provided for sealing the ends of the cylindrical tube. Each of the end gudgeons is respectively associated with an end of the cylindrical tube such that after a weld joint is formed between the cylindrical tube and the end gudgeon, the end gudgeon provides a compression joint to prevent the cylindrical tube from separating from the end gudgeon, due to material creep, at elevated operating temperatures.

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 water-cooled roll is used for transporting material in a heated environment. The roll includes a hollow rotatable arbor with a system for supplying cooling water to the interior of the arbor. A plurality of annular tires are spaced along the arbor, each tire including a plurality of recesses spaced along an inner periphery of the tire on opposite sides of the tire. A plurality of locking bars are attached to the arbor, each locking bar extending into one recess of one tire. Each tire includes at least two locking bars extending into recesses thereof for rotationally and axially positioning the tire on the arbor.

Abstract: Discharge screw (6) for a moving hearth, and in particular for an annular rotary hearth (2) of a reheat furnace for the heat treatment of loose materials, comprising a cylinder (61) arranged above and substantially radially with respect to this annular hearth (2) and turned by suitable actuators (15) so as to discharge the materials from the edges of this annular hearth (2); this cylinder (61) comprises on its lateral surface a first series of helicoids (62) beginning in an area close to its outermost end with respect to the furnace and a second series of helicoids (63) beginning at its innermost end with respect to the furnace; the inclination of the helicoids (62) of this first series is essentially symmetrical to the inclination of the helicoids (63) of this second series; and in this screw (6) each helicoid (62, 63) of one series comprises an inward end that meets the inward end of a corresponding helicoid (63, 62) of the other series in such a way that at at least one of the abovementioned ends a free fi

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: Discharge screw (6) for a moving hearth, and in particular for an annular rotary hearth (2) of a reheat furnace for the heat treatment of loose materials, comprising a cylinder (61) arranged above and substantially radially with respect to this annular hearth (2) and turned by suitable actuators (15) so as to discharge the materials from the edges of this annular hearth (2); this cylinder (61) comprises on its lateral surface a first series of helicoids (62) beginning in an area close to its outermost end with respect to the furnace and a second series of helicoids (63) beginning at its innermost end with respect to the furnace; the inclination of the helicoids (62) of this first series is essentially symmetrical to the inclination of the helicoids (63) of this second series; and in this screw (6) each helicoid (62, 63) of one series comprises an inward end that meets the inward end of a corresponding helicoid (63, 62) of the other series in such a way that at at least one of the abovementioned ends a free fi

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: 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 fluid cooled conveying screw adapted for rotary hearth furnaces. A plurality of solid alternating single and double flights are affixed to an outer barrel. The single flights are at least partially cladded to withstand the rigors of the furnace. The double flights extend partially down the barrel.

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 roller for furnaces, is used with a plurality of rollers substantially parallel to each other. The roller is provided with a plurality of annular collars which are side by side and spaced apart. The annular collars are cooled by means of a flow of cooling fluid which is oriented transversely with respect to their axis and parallel to their median plane. The annular riders are made in tubular form and may be of toroidal form and are connected separately each to the supply duct and to the return duct for the cooling fluid. They may also be formed by the individual turns of a tubular spiral or by a number of successive segments of a spiral which are connected via their ends to the supply duct and to the return duct.

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 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.

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: Highly compressed ceramic fiber conveyor rolls can provide desirable insulation coupled with extended wear for roller conveying of high temperature articles such as freshly made sheet glass. However, under harsh industrial conditions, as experienced with the conveying of heavy loads consistently at the upper end of operable temperature ranges, such ceramic fiber rolls may be subject to premature wear at the interface between an inner shaft and an outer ceramic fiber roll cover, as well as experience longitudinal roll cracking of the cover. It has now been found that both of these potential cover problems can be successfully addressed by placement within the cover of perforated, rigid disks. Such disks placed occasionally along the roll and within ceramic fiber cover, are particularly suitable for use with hardened covers, where the hardening is more concentrated towards the surface of the cover and the disks are present within a softer inner fiber core of the cover.

Abstract: A method of manufacturing an insulated furnace roller includes providing the roller with an insulating refractory castable between the spaced apart tires of the roller and between the outermost tires and the furnace walls, the castable being secured to an arbor of the roller by metal anchors having outer ends that terminate inwardly of the outer surface of the castable, and wherein between the tires and the castable spacer discs are provided and between openings formed by the discs and tires insulation is inserted, the arbor being also wrapped with insulation before the castable is formed on the arbor.

Abstract: A conveyor roll for conveying heated glass sheets along a conveyor assembly is provided that comprises a fused silica roller having opposing cylindrical ends, a pair of end caps formed from a machinable steel which may be heat resistant for rotatably mounting the ceramic roller within a conveyor assembly, wherein each end cap has a tubular wall for receiving and surrounding one of the cylindrical ends of the roller, and a spring retainer for non-rotatably mounting each of the end caps to the roller. Each spring retainer includes a coil spring formed from flat sided coils helically wound around a cylindrical end of the roller, each of which coils includes bent portions and straight portions for resiliently and frictionally inter-engaging the tubular wall of the cap and the cylindrical end of the roller, respectively, despite the thermal differential expansion that occurs between the tubular wall of the cap and the cylindrical end of the roller as the roll is exposed to elevated temperatures.

Abstract: A heat-resistant material having excellent high-temperature strength and high oxidation resistance at temperatures exceeding 1300.degree. C. The material is a heat-resistant Cr-Fe alloy including at least 60% of Cr and at least 5% of Fe, and having a mean grain size of at least 50 .mu.m and having a melting point of at least 1600 .degree. C., or a composite material composed of the said heat-resistant alloy serving as a metal matrix and a ceramic, and containing up to 40% by volume of a dispersed ceramic phase in the metal matrix.

Abstract: Tall work-supporting elements, riders or buttons, for reheat furnaces increase the unshadowed area of radiation exposure for the under surface of steel workpieces and thereby significantly reduce the "skid mark" phenomena of workpieces. The tall supporting members are secured to horizontal water-cooled skids and have internal flow passageways to receive cooling water.

Abstract: The present invention enables a tile or other ceramic wares to have a deep reduced color. A roller hurse kiln 210 includes rollers 214, and a burner mounted in a firing zone adjacent to the outlet so as to provide a reducing gas. The burner has gas injection holes. The injection holes may be circular holes having a diameter of 1 to 5 mm or may be in the form of a slit having a width of 1 to 5 mm. The burner is located 15 to 80 mm above a material to be fired.

Abstract: The disclosure relates to an insulated furnace roller and a method of manufacture thereof, in which the roller is provided with an insulating refractory castable between the spaced apart tires of the roller and between the outermost tires and the furnace walls, the castable being secured to an arbor of the roller by metal anchors having outer ends that terminate inwardly of the outer surface of the castable, and wherein between the tires and the castable spacer discs are provided and between openings formed by the discs and tires insulation is inserted, the arbor being also wrapped with insulation before the castable is formed on the arbor.

Abstract: There is disclosed herein a drive system and a coupling system for each roller in a roller hearth kiln. The drive system is modular and encased and includes a plurality of aligned drive worms that engage driven gears that in turn rotate a drive shaft. The casing defines an oil sump which lubricates and cools the worm and gear and permits higher precision elements to be used. A cup-like ball-bearing style coupling system is used to drivingly couple the drive shaft to the roller.

Abstract: The system comprises at least one coolant-carrying tubular support carrying at least one rider. The latter consists of a heat-resistant cast housing provided with at least one cutout into which a ceramic carrier is inserted. The carrier is of sufficient compressive strength even at a temperature in excess of 1,200.degree. C. The housing remains at a temperature below 1,200.degree. C. and therefore provides a very good support for the carrier which it holds and transfers the loads that occur into the tubular support. The housing is detachably connected with the tubular support by means of a bolt.

Abstract: A drive mechanism (32) for a roller conveyor (28) of a furnace (12) for heating flat glass sheets includes a primary drive loop (34) received by primary drive wheels (36) and also includes a plurality of secondary drive loops (50) each of which is associated with a pair of conveyor rolls (30). Internal teeth (42) of the primary drive loop (34) and external teeth (52) of the secondary drive loops (50) are engaged to provide a driving relationship therebetween, while internal teeth (54) of the secondary drive loops (50) drive gears (56) secured to the conveyor rolls (30). A plurality of idler gears (64) mesh with the external teeth (54) of the secondary drive loops (50) to maintain tensioning that prevents backlash and provides uniform reversal of all conveyor rolls as the driving changes from one direction to the other as well as allowing the conveyor rolls to be positioned with their high sides aligned so as to maintain planarity during the conveyance.

Abstract: A furnace grate roller, mainly for incinerating refuse, with a tubular casing formed by rings of bars separated by blow gaps of set width, is of conventional structure, comprising a cylindrical cage framework with T-shape cross-section longitudinal members disposed along its generatrices and a casing formed of groups of rings separated by gaps for blowing combustion-supporting air. The rings are segmented into arcuate bars which extend between the longitudinal members. To limit relative movement of the bars while allowing them some play the bars are attached at one end by a notch to the flange of a longitudinal member and are secured in place by bosses on an intermediate member bolted longitudinally to the longitudinal member. The bars have recesses at their end contiguous with the intermediate member into which the bosses are inserted. In this way the bars are attached with limited capacity for movement relative to the roller in the axial, radial and peripheral directions.

Abstract: A roller hearth type heat treating furnace has a furnace housing, the inside of which is partitioned into first, second and third treating chambers by a plurality of heat insulating intermediate doors. In order to independently control the temperature inside each treating chamber, the first treating chamber is provided with radiant tubes, the second treating chamber with radiant tubes and a cooler with a fan and the third treating chamber with electro tubes and cooling tubes. The furnace accommodates a series of hearth rollers which can be selectively driven by a plurality of electric motors and a plurality of clutches so that a material located in one chamber may be transported into the adjoining chamber only or successively transported within the furnace.

Abstract: Disclosed is an improved skid rail used in furnaces, particularly, the furnaces for heating steel pieces for hot processing. The skid rail uses, as the material of the skid members thereof, an oxide-dispersion reinforced type super alloy which comprises certain amounts of Cr, Fe, Al and Ti, and optionally a certain amount of Co, the balance being Ni, and contains fine particles of a high melting point metal oxide such a Y.sub.2 O.sub.3, ZrO.sub.2 and Al.sub.2 O.sub.3 dispersed in the austenitic matrix of the alloy.

Abstract: Steel charges are heated to rolling temperature in reheating furnaces. It is standard practice for the charge to be moved through such a furnace on continuous water-cooled tubular supports crossing the furnace in a straight line. The supports obstruct charge heat-up to the desired temperature at the points where the charge is in contact with the tubular supports. A lateral offset of the tubular supports or similar designs have been unable to overcome this disadvantage. The tubular supports of the present reheating furnace are therefore several times offset from a straight line through the furnace between the furnace inlet and the furnace exit or, in the case of a furnace with a fixed hearth in the soaking zone, the furnace inlet and the fixed hearth. Each tubular support section between two such offsets is shorter than the upstream tubular support section. The present arrangement is particularly advantageous for pusher-type furnaces or walking-beam furnaces.

Abstract: A method for heating stock comprises feeding stock 9 to be heated into a heating chamber 1, causing heating gas to enter the heating chamber 1 to heat the stock 9 and leave the heating chamber 1 after heating the stock 9 and then removing the stock 9 from the heating chamber 1 on completion of heating, the heating gas being allowed to enter the heating chamber 1 by way of a plenum chamber 2,3 which communicates with the heating chamber 1. The heating gas may be supplied by a regenerative burner 4,5 as fuel combustion products. Where there are two such burners 4,5 one may be firing while the other is flueing.

Abstract: A method, and a kiln, by and in which to fire ceramic tiles (8), or similar items, which are taken along a given path each stage of which is singular in terms of temperature level and other parameters governing the firing cycle. Travelling forward along the path, the tiles are subjected to a succession of alternating forward and reverse movements (30, 31) sequenced in such a way that each passage forward is followed by a shorter movement in reverse.

Abstract: A retractable, roller hearth for use in an industrial heat treat furnace is disclosed whereby the alloy rollers are retracted from their load bearing position when the furnace heat treat processes are underway thus maintaining the rated load capacity of the furnace. A plurality of guided rail support posts and guided, sealed lift posts accurately assure straight line vertical motion of the refractory base enabling contact between fibrous rope seals to seal the hearth from the cooler, lower portions of the furnace when the hearth is in a raised position.

Abstract: The rollers of a roller hearth kiln are coupled to corresponding driving shafts respectively, and each of the driving shafts has one thereof horizontally extended away from the kiln. A case which is disposed along the kiln houses the extended ends of the driving shaft, and vertical sprocket wheels are mounted on the extended ends of the driving shafts in the above case respectively. A rail is secured to the bottom of the case so as to extend below the sprocket wheels, and a driving chain moves on the rail while engaging the sprocket wheels from below.

Abstract: A roller furnace having a passage (3) for the firing of ceramic or refractory products, such as tiles and the like, is provided with a passage (6) running parallel to, and arranged below the firing passage (3) for effecting a heat treatment on a product, possibly with hot gases removed from the firing passage (3).

Abstract: A countercurrent fluid cooled conveying screw is disclosed. Suitable for furnace applications, the screw includes an outer shaft spatially circumscribing an inner tube. A plurality of hollow, fluid cooled flights are affixed to the outer shaft and are in fluid flow communication with coolant coursing through the screw. The coolant is first directed through the flights and then back through the outer shaft before exiting through the inner tube.

Abstract: A roller tunnel kiln includes a lower kiln body half composed integrally of a kiln bottom and a pair of transversely spaced lower kiln side wall halves which are made of refractory brick, a pair of endless chains disposed respectively on transversely opposite sides of the lower kiln body half outside thereof, the endless chains being movable forward along the lower kiln side wall halves at a height substantially equal to upper ends of the lower kiln side wall halves and movable backward along the lower kiln side wall halves at a height lower than the kiln bottom, a drive device for driving the endless chains in synchronism with each other, couplings mounted at regular intervals on link plates or link pins of each of the endless chains, feed members having opposite ends gripped by respective couplings and movable in a longitudinal direction of the lower kiln body half directly thereabove in response to the endless chains being synchronously driven, the feed members being made of a heat-resistant material and h

Abstract: The invention concerns a means for supporting the material being treated in continuous-action heat treatment furnaces. The support means consists of a cooled roller (5), on the periphery of which at least two cooled rollers (7) with substantially smaller diameter have been placed. The roller (5) is placed outside the furnaces (13, 16) and/or between two consecutive furnaces. Supporting of the material (18) is carried out by the aid of one roller (7) at a time, the roller (7) rotating at the speed of moving of the material. By the aid of the drive (3) provided for the roller (5), the mutual positioning of the rollers (7) can be changed.

Abstract: Glass sheet handling devices are provided with glass sheet engaging surfaces composed of a phenolic resin reinforced with fibers of an aromatic polyamide composition. In a specific embodiment of this invention, a sufficient number of said fibers extend to an exposed surface of said devices to develop a coefficient of friction sufficient to prevent relative sliding between the exposed surface of said glass sheet engaging member and said glass sheet.

Abstract: Pulling rolls (13) for glass ribbons (11) and methods for manufacturing such rolls are provided. The rolls include a shaft (17), a plurality of heat-resistant discs (15) mounted on the shaft in face-to-face contact, and a pair of fittings (25 or 25,31) affixed to the shaft which apply an axial compressive force to the discs. The magnitude of the axial compressive force is adjusted so that the portions (27) of the roll surface (33) which contact the glass ribbon during use have a Shore D hardness at room temperature of between 30 and 55. The rolls achieve a long service life without applying excessive force to the glass ribbon or generating high levels of particulate contamination.