| Patents for F27B 11 - Bell-type furnaces (274) |
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| 06/03/1998 | CN2283220Y Bell type annealing furnace internal casing |
| 05/26/1998 | US5756043 Cast refractory base segments and modular fiber seal system for plural-stack annealing furnace |
| 03/24/1998 | US5730930 Method and device for exchanging the atmosphere in a hood-shaped annealing furnace |
| 01/28/1998 | CN1171538A Annealing base for hood-type annealing furnaces |
| 10/28/1997 | US5681525 Cast refractory base segments and modular fiber seal system for single-stack annealing furnace |
| 04/01/1997 | US5616297 Annealing base for hood-type annealing furnaces |
| 12/18/1996 | CN1138352A Process and device for exchanging the atmosphere in a hood type annealing furnace |
| 11/20/1996 | CN2240700Y Bell-type loop wheel machine electric resistance furnace |
| 11/19/1996 | US5575970 Cast refractory base segments and modular fiber seal system for plural-stack annealing furnace |
| 11/06/1996 | EP0740709A1 Device for cooling the charge protection lid of annealing furnaces |
| 10/08/1996 | US5562879 Cast refractory base segments and modular fiber seal system for single-stack annealing furnace |
| 08/28/1996 | EP0728848A2 Base for bell type furnaces |
| 06/05/1996 | EP0714452A1 Process and device for heat treatment in a hood type annealing furnace |
| 10/29/1995 | CA2147957A1 Seal arrangement for batch coil annealing furnace |
| 07/27/1995 | WO1995020058A1 Device for cooling the charge protection lid of annealing furnaces |
| 07/11/1995 | US5432319 Furnace for heat treatment of dental products in an inert atmosphere |
| 05/30/1995 | US5419699 Seal arrangement for batch coil annealing furnace |
| 05/16/1995 | CA1335534C Top-hat furnaces used especially for controlled atmosphere annealing of coiled metal |
| 02/23/1995 | WO1995005487A1 Process and device for exchanging the atmosphere in a hood type annealing furnace |
| 11/30/1994 | CN1026801C Method of nitriding steel and heat treat furnaces used therein |
| 08/23/1994 | US5340091 Batch coil annealing furnace |
| 04/06/1994 | CN1024144C Nitriding furnace apparatus |
| 10/12/1993 | US5252062 Thermal processing furnace |
| 09/23/1993 | DE4308244A1 Heat treatment and sintering in controlled atmos for prodn. of dental prostheses - using oven comprising inverted cup-shaped quartz vessel surrounded by heating coil and insulation and sealed to baseplate by heat-resisting O=rings |
| 08/18/1993 | CN2140507Y Discharging pusher carriage for annealing furnace |
| 07/28/1993 | CN1074750A Quick adjusting and testing method for airfuel ratio of covered type furnace |
| 05/04/1993 | US5207578 Heat processing apparatus of vertical type |
| 05/04/1993 | US5207573 Heat processing apparatus |
| 10/14/1992 | CN2118961U Bell-jar annealing furnace |
| 06/03/1992 | CN2106016U Piston type pressurized sintering furnace |
| 05/19/1992 | US5114500 Nitriding furnace apparatus and method |
| 04/29/1992 | CN1060685A Method of nitriding steel and heat treat furnaces used therein |
| 10/05/1991 | CA2039385A1 Helium based protective environment for non-continuous heat treatment of metals |
| 07/03/1991 | CN1052704A Nitriding furnace apparatus |
| 06/26/1991 | EP0434183A2 Nitriding furnace |
| 05/23/1991 | DE4035665A1 Sinter furnace - has guides to direct flow at burner flames to burn off all the released bonding agent |
| 05/15/1991 | CN2077103U Constant temp. cabinet for heating face towel |
| 04/09/1991 | US5006064 Furnace seal |
| 02/21/1991 | DE3926975A1 Secure hoist mountings on steel heat treatment unit - has segmented support ring to accommodate thermal stresses and various design for attaching mountings to mantle's tank top |
| 10/23/1990 | US4964798 Method and apparatus for quickly purging atmosphere gas from bell furnace |
| 02/15/1990 | DE3809594A1 Method and arrangement for making red hot, burning or combusting articles |
| 02/07/1990 | EP0354127A1 Bell-type furnaces, in particular for annealing metallic coils in a controlled atmosphere |
| 09/19/1989 | US4867675 Method and apparatus for quickly purging atmosphere gas from bell furnace |
| 07/11/1989 | US4846675 Annealing furnace |
| 12/29/1988 | DE3719695A1 Gas-tight furnace, in particular vacuum furnace |
| 11/30/1988 | CN88203290U Combination bell-type furnace |
| 04/08/1987 | CN86203476U Furnace for heating wheel band |
| 02/17/1987 | CA1217923A1 Sagger furnace |
| 01/08/1987 | DE3523166A1 Process and device for producing black clay articles |
| 11/12/1986 | CN85205207U Double inverse flow-type 3-way gas oven |
| 05/27/1986 | CA1204944A1 Processed ferrous metal and process of production |
| 02/12/1985 | US4498866 Sagger furnace |
| 02/05/1985 | US4497671 High water vapor decarburization of steel scraps |
| 11/20/1984 | CA1178049A1 Loading system for an annealing furnace charge and components therefor |
| 11/06/1984 | US4480822 Annealing furnace system |
| 09/11/1984 | CA1174261A1 Atmosphere controlled electric melting |
| 01/03/1984 | US4423857 Spacer for batch coil annealing |
| 11/01/1983 | US4412815 Loading system for an annealing furnace charge and components therefor |
| 08/31/1983 | EP0087111A2 Furnace, in particular vacuum furnace for dental ceramic purposes |
| 08/10/1983 | EP0085136A2 Processed ferrous metal and process of production |
| 06/21/1983 | US4389724 Atmosphere controlled electric melting |
| 09/28/1982 | US4352189 Atmosphere control of slag melting furnace |
| 08/17/1982 | CA1129645A1 Batch coil annealing furnace baseplate |
| 01/12/1982 | US4310302 Batch coil annealing furnace baseplate |
| 09/23/1981 | EP0036049A1 Electric-arc furnace structure and method for heating refractory materials |
| 09/22/1981 | CA1109513A1 Atmospheric control of flux pre-melting furnace |
| 08/20/1981 | WO1981002339A1 Atmosphere controlled electric melting |
| 08/19/1981 | EP0034109A1 Atmosphere controlled electric melting furnace |
| 07/29/1981 | EP0032775A1 Furnace, especially a ceramic or heating furnace |
| 11/25/1980 | CA1090122A1 Method and apparatus for effecting uniform heat transfer in an industrial furnace |
| 05/13/1980 | US4202997 Atmospheric control of flux pre-melting furnace |
| 03/27/1979 | US4146777 Heat conserver for bell-type ovens |
| 03/06/1979 | US4142712 Method and apparatus for effecting uniform heat transfer in an industrial furnace |
| 06/27/1978 | US4097715 Laser jet bell kiln |