Roll Patents (Class 432/236)
  • Patent number: 8602955
    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.
    Type: Grant
    Filed: March 16, 2010
    Date of Patent: December 10, 2013
    Assignee: Andritz Bricmont Inc.
    Inventor: Patrick H. Bryan
  • Publication number: 20100239991
    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.
    Type: Application
    Filed: March 16, 2010
    Publication date: September 23, 2010
    Inventor: Patrick H. Bryan
  • Patent number: 7578380
    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.
    Type: Grant
    Filed: August 16, 2006
    Date of Patent: August 25, 2009
    Assignee: SMS Siemag Aktiengesellschaft
    Inventors: Peter Brinkmeier, Dankfried Klempel
  • Patent number: 7448484
    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.
    Type: Grant
    Filed: September 26, 2006
    Date of Patent: November 11, 2008
    Assignee: SMS Demag Aktiengesellschaft
    Inventors: Peter Brinkmeier, Dankfried Klempel
  • Patent number: 7275632
    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.
    Type: Grant
    Filed: September 23, 2005
    Date of Patent: October 2, 2007
    Assignee: SMS Demag Aktiengesellschaft
    Inventors: Peter Brinkmeier, Dankfried Klempel
  • Patent number: 6802711
    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.
    Type: Grant
    Filed: April 26, 2002
    Date of Patent: October 12, 2004
    Assignee: Outokumpu Oyj
    Inventors: Taisto Yrjänä, Heikki Arffman, Heikki Uurtamo, Risto Leinonen, Jussi Yli-Niemi
  • Patent number: 6672866
    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.
    Type: Grant
    Filed: October 1, 2002
    Date of Patent: January 6, 2004
    Assignee: Riedhammer GmbH
    Inventors: Ralf Fink, Hans-Georg Hartmann, Jörg Ridder
  • Patent number: 6638472
    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.
    Type: Grant
    Filed: September 24, 2001
    Date of Patent: October 28, 2003
    Assignee: SMS Demag AG
    Inventor: Jürgen Lemke
  • Patent number: 6547557
    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.
    Type: Grant
    Filed: September 13, 2001
    Date of Patent: April 15, 2003
    Assignee: SMS Demag Aktiengesellschaft
    Inventor: Jürgen Lemke
  • Publication number: 20020146660
    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.
    Type: Application
    Filed: April 6, 2001
    Publication date: October 10, 2002
    Inventors: Allen Kass, Terence Michael Miller, Rainer J. Bleil, Jiann-Hsing Chen
  • Patent number: 6435867
    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.
    Type: Grant
    Filed: November 10, 2000
    Date of Patent: August 20, 2002
    Assignee: Bricmont, Inc.
    Inventors: Hugh B. Carr, William Goodlin
  • Patent number: 6432030
    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.
    Type: Grant
    Filed: August 30, 1999
    Date of Patent: August 13, 2002
    Assignee: Duraloy Technologies, Inc.
    Inventor: Daniel V. Miller
  • Patent number: 6426969
    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
    Type: Grant
    Filed: July 10, 2001
    Date of Patent: July 30, 2002
    Assignee: SMS Demag S.p.A.
    Inventor: Piergiorgio Fontana
  • Patent number: 6402507
    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.
    Type: Grant
    Filed: October 20, 2000
    Date of Patent: June 11, 2002
    Assignee: Cast Masters, Inc.
    Inventor: Bruce A. Boettger
  • Publication number: 20020009117
    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
    Type: Application
    Filed: July 10, 2001
    Publication date: January 24, 2002
    Inventor: Piergiorgio Fontana
  • Patent number: 6152087
    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.
    Type: Grant
    Filed: December 9, 1997
    Date of Patent: November 28, 2000
    Assignee: NGK Insulators, Ltd.
    Inventors: Toshio Shibata, Shigeo Ito, Kazuhiro Mizuno, Yasuhiro Terashima, Yuji Nakagawa, Keita Inoue, Norihiko Orita, Tetsuo Takahashi, Kazuo Yamamura
  • Patent number: 5921772
    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.
    Type: Grant
    Filed: March 23, 1998
    Date of Patent: July 13, 1999
    Assignee: C & H Alloy Skid Riders Company
    Inventors: C. E. Hopson, Frank Campbell, Jr.
  • Patent number: 5863197
    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.
    Type: Grant
    Filed: April 25, 1997
    Date of Patent: January 26, 1999
    Assignee: The International Metals Reclamation Company, Inc.
    Inventors: William A. Boy, David M. Hoffman
  • Patent number: 5766002
    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.
    Type: Grant
    Filed: March 30, 1995
    Date of Patent: June 16, 1998
    Assignee: IMDEC, S.A.
    Inventor: Jesus Antonio Silvestrini
  • Patent number: 5448040
    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.
    Type: Grant
    Filed: July 18, 1994
    Date of Patent: September 5, 1995
    Assignee: Italimpianti S.p.A.
    Inventors: Stefano Deplano, Roberto Millone, Maurizio Patrone
  • Patent number: 5421724
    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.
    Type: Grant
    Filed: December 16, 1993
    Date of Patent: June 6, 1995
    Assignee: Italimpianti of America, Inc.
    Inventor: Giuseppe Facco
  • Patent number: 5374186
    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.
    Type: Grant
    Filed: January 19, 1994
    Date of Patent: December 20, 1994
    Assignee: Italimpianti of America, Inc.
    Inventor: Giuseppe Facco
  • Patent number: 5370530
    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.
    Type: Grant
    Filed: March 24, 1993
    Date of Patent: December 6, 1994
    Assignee: Italimpianti of America, Inc.
    Inventor: Giuseppe Facco
  • Patent number: 5362230
    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.
    Type: Grant
    Filed: January 19, 1994
    Date of Patent: November 8, 1994
    Assignee: Italimpianti of America, Inc.
    Inventor: Giuseppe Facco
  • Patent number: 5355996
    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.
    Type: Grant
    Filed: August 2, 1993
    Date of Patent: October 18, 1994
    Assignee: Global Consulting, Inc.
    Inventor: Charles M. Hart
  • Patent number: 5341568
    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.
    Type: Grant
    Filed: July 9, 1993
    Date of Patent: August 30, 1994
    Assignee: Bricmanage, Inc.
    Inventors: Francis H. Bricmont, Hugh B. Carr
  • Patent number: 5316129
    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.
    Type: Grant
    Filed: March 2, 1993
    Date of Patent: May 31, 1994
    Assignee: Vesuvius Crucible Company
    Inventor: Alan W. Daily
  • Patent number: 5288228
    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.
    Type: Grant
    Filed: September 8, 1992
    Date of Patent: February 22, 1994
    Assignee: Kubota Corporation
    Inventors: Hideo Fujita, Jun Funakoshi, Takahiro Kaba, Akira Shinosaki, Hiroyuki Araragi
  • Patent number: 5284440
    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.
    Type: Grant
    Filed: June 29, 1992
    Date of Patent: February 8, 1994
    Assignee: SSE International Corporation
    Inventors: Frank Campbell, Jr., Hugh J. Harding
  • Patent number: 5248255
    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.
    Type: Grant
    Filed: June 8, 1992
    Date of Patent: September 28, 1993
    Assignee: Inax Corporation
    Inventors: Toshimichi Morioka, Yaushisa Hirano, Akira Iwahashi, Masataka Matsuo, Kazuyoshi Kurayoshi, Akio Ishii
  • Patent number: 5230618
    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.
    Type: Grant
    Filed: February 24, 1992
    Date of Patent: July 27, 1993
    Assignee: Bricmanage, Inc.
    Inventors: Francis H. Bricmont, Hugh B. Carr
  • Patent number: 5217374
    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.
    Type: Grant
    Filed: July 18, 1991
    Date of Patent: June 8, 1993
    Assignee: Eisenmann Corporation
    Inventor: Charles H. Birks
  • Patent number: 5136610
    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.
    Type: Grant
    Filed: January 30, 1991
    Date of Patent: August 4, 1992
    Assignee: LOI Essen Industrieofenanlagen GmbH
    Inventor: Helmut Heuss
  • Patent number: 5088920
    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.
    Type: Grant
    Filed: November 30, 1990
    Date of Patent: February 18, 1992
    Assignee: Glasstech, Inc.
    Inventor: Pauli T. Reunamaki
  • Patent number: 5057011
    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.
    Type: Grant
    Filed: May 24, 1990
    Date of Patent: October 15, 1991
    Assignee: Fours Picard
    Inventors: Andre Le Lan, Jose de Freitas
  • Patent number: 4932864
    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.
    Type: Grant
    Filed: July 7, 1989
    Date of Patent: June 12, 1990
    Assignee: Chugai Ro Co., Ltd.
    Inventor: Yoshinaga Miyabe
  • Patent number: 4900248
    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.
    Type: Grant
    Filed: January 24, 1989
    Date of Patent: February 13, 1990
    Assignees: Daido Tokushuko Kabushiki Kaisha, Inco Alloys International, Inc.
    Inventors: Kazuto Terai, Susumu Isobe, Kenji Tsukuda, Hisao Inoue, Hiroshi Kobayashi
  • Patent number: 4886450
    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.
    Type: Grant
    Filed: July 27, 1988
    Date of Patent: December 12, 1989
    Assignee: Ruhrgas Aktiengesellschaft
    Inventor: Helmut Heuss
  • Patent number: 4840560
    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.
    Type: Grant
    Filed: November 25, 1987
    Date of Patent: June 20, 1989
    Assignee: British Gas PLC
    Inventor: John D. Waddington
  • Patent number: 4828489
    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.
    Type: Grant
    Filed: December 11, 1987
    Date of Patent: May 9, 1989
    Inventor: Francesco Albonetti
  • Patent number: 4802845
    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.
    Type: Grant
    Filed: August 31, 1987
    Date of Patent: February 7, 1989
    Assignee: NGK Insulators, Ltd.
    Inventor: Yasuhiro Kajiura
  • Patent number: 4802844
    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.
    Type: Grant
    Filed: January 20, 1988
    Date of Patent: February 7, 1989
    Assignee: Gas Research Institute
    Inventors: Timothy J. Kuhn, James W. Bender, Arvind C. Thekdi
  • Patent number: 4775316
    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).
    Type: Grant
    Filed: May 13, 1987
    Date of Patent: October 4, 1988
    Assignee: Welke Industriale S.P.A.
    Inventor: Roberto Zelaschi
  • Patent number: 4636127
    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.
    Type: Grant
    Filed: April 3, 1985
    Date of Patent: January 13, 1987
    Assignee: The International Metals Reclamation Co., Inc.
    Inventors: Francisco Olano, John A. MacDougall, John K. Pargeter
  • Patent number: 4596527
    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
    Type: Grant
    Filed: December 6, 1984
    Date of Patent: June 24, 1986
    Assignee: Inax Corporation
    Inventors: Hidehiko Yamada, Takeshi Asano, Shuji Kimura, Yokichi Hashimoto, Koichi Fujitani
  • Patent number: 4538986
    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.
    Type: Grant
    Filed: January 18, 1984
    Date of Patent: September 3, 1985
    Assignee: Outokumpu Oy
    Inventors: Seppo I. Blomqvist, Markku T. Saarela, Martti E. Huhtala, Raimo A. Niska, Hannu A. Vaittinen
  • Patent number: 4525196
    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.
    Type: Grant
    Filed: August 24, 1984
    Date of Patent: June 25, 1985
    Assignee: PPG Industries, Inc.
    Inventors: Michael T. Fecik, John J. Ewing, Edward I. Mates
  • Patent number: 4519337
    Abstract: In continuous hot dipping of metal strip, the tension of the strip at pre-treatment furnaces and that at air-wiping nozzles are isolated and made independent of each other. For this purpose bridle rolls driven by motors are disposed downstream of the pre-treatment furnaces. The tension at the former is maintained at a lower value, while the tension at the latter is maintained at a higher value. The bridle rolls are mounted in bearings which are covered by seal boxes in which an inert gas is enclosed so as to prevent the intrusion of atmospheric air into the furnaces.
    Type: Grant
    Filed: September 14, 1981
    Date of Patent: May 28, 1985
    Assignee: Nisshin Steel Co., Ltd.
    Inventors: Yoshio Ono, Takashi Tanaka
  • Patent number: 4421482
    Abstract: A conveyor roll (20,21,20') for conveying heated glass sheets on a horizontal roller conveyor of a glass sheet processing system is disclosed as including a shaft (42,70,42) having a support (44,72,80) of aromatic polyamide fibers for engaging the conveyed glass sheets. Kevlar fibers are preferably utilized for the support (44,72,80) so as to have the requisite thermal stability and resistance to cutting by broken glass. One embodiment of the roll (20) has a helically wrapped support (44) comprising braided Kevlar rope or an outer Kevlar sleeve (64) and a central core (62) which may be longitudinally extending metallic or glass fiber strands (66) or a helical spring (68). Another embodiment of the conveyor roll (21) includes a ceramic roll shaft (70) of fused silica extending through an outer sleeve (72) of Kevlar fibers. A further embodiment of the conveyor roll (20') includes a support (80) having annular conveying discs (82) made of Kevlar fibers and spaced along the length of the shaft (42).
    Type: Grant
    Filed: January 7, 1982
    Date of Patent: December 20, 1983
    Inventor: Ronald A. McMaster
  • Patent number: RE46010
    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.
    Type: Grant
    Filed: October 22, 2009
    Date of Patent: May 24, 2016
    Assignee: Corning Incorporated
    Inventor: David S. Kaiser