EP0371295A2 - Elément chauffant radiant - Google Patents
Elément chauffant radiant Download PDFInfo
- Publication number
- EP0371295A2 EP0371295A2 EP89120765A EP89120765A EP0371295A2 EP 0371295 A2 EP0371295 A2 EP 0371295A2 EP 89120765 A EP89120765 A EP 89120765A EP 89120765 A EP89120765 A EP 89120765A EP 0371295 A2 EP0371295 A2 EP 0371295A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- radiant heater
- damping
- light emitter
- radiator
- light
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000010438 heat treatment Methods 0.000 title claims abstract description 53
- 238000013016 damping Methods 0.000 claims abstract description 58
- 238000011144 upstream manufacturing Methods 0.000 claims description 9
- 239000002241 glass-ceramic Substances 0.000 claims description 5
- 229910052736 halogen Inorganic materials 0.000 abstract description 2
- 150000002367 halogens Chemical class 0.000 abstract description 2
- 238000009413 insulation Methods 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000035876 healing Effects 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 230000004913 activation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010411 cooking Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 230000007420 reactivation Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G15/00—Apparatus for electrographic processes using a charge pattern
- G03G15/20—Apparatus for electrographic processes using a charge pattern for fixing, e.g. by using heat
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B3/00—Ohmic-resistance heating
- H05B3/68—Heating arrangements specially adapted for cooking plates or analogous hot-plates
- H05B3/72—Plates of sheet metal
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B3/00—Ohmic-resistance heating
- H05B3/68—Heating arrangements specially adapted for cooking plates or analogous hot-plates
- H05B3/74—Non-metallic plates, e.g. vitroceramic, ceramic or glassceramic hobs, also including power or control circuits
Definitions
- the invention relates to a radiant heater, in particular for glass ceramic hot plates, with an electric light emitter and at least one series resistor.
- Radiant heaters of this type have become known, for example, from EP-A-176 027.
- the light heater is an electrical heating resistor that is heated to a much higher temperature (above 1500 K and preferably above 2000 K) than the usual heating resistor coils that work at a temperature below 1500 K and are referred to below as dark radiators even though they also work in the field of red heat.
- the light emitters are usually encapsulated in a protective gas atmosphere, for example in quartz glass bulbs or tubes and partially provided with means to counteract the evaporation of the material or to reverse it, for example by a halogen filling.
- EP-A 176 027 therefore provides a series connection of a series resistor in the form of a dark radiator in front of the bright radiator, which dampens the inrush current and supplements the power emitted by the bright radiator during operation as a dark radiator.
- the total installed power can also be divided between the light emitter and the dark emitter, which is particularly advantageous in the case of the arrangement of the light emitter in straight bars, which was customary hitherto, for filling the entire heated zone.
- the object of the invention is therefore to provide a radiant heater which ensures a permissible inrush current for bright spots of all power ranges.
- the damping device preferably switches on the series resistor during the heating phase of the light emitter and advantageously switches it off again automatically after the light emitter is heated. It can work depending on the voltage drop on the light emitter, which is due to the positive temperature coefficient increases after it has warmed up.
- a threshold switching device that responds to the voltage drop can be provided here. This can consist of a relay, but is preferably designed as an electronic circuit that triggers when a certain voltage value is reached and causes a series resistor to be switched off. In order to avoid inadvertent switching operations caused by voltage changes in any case, the activation, ie the signal which triggers the reactivation of the series resistor, can be triggered by completely switching off the voltage, for example by a special isolating switch.
- the damping device can also consist of a delay circuit, i.e. a timer, because usually the heating phase of a radiant heater is quite short and is on the order of 1 to 2 seconds.
- the series resistor can be a separate damping resistor, which is therefore switched off during further operation.
- the resistor is not exposed to permanent loads, it can be loaded quite heavily and can therefore be small and simple.
- it should preferably be arranged in the region of the radiant heater so that the heat generated by it can be dissipated well on the one hand and on the other hand can also be used to advantage.
- the invention leads to a reduction of the inrush current to a permissible value in all types of radiant heaters which include a light radiator, which can be in some cases a power of ten above the working current and also because of the measures of the invention its short-term nature and its sudden occurrence would otherwise lead to impermissible network loads.
- Fig. 1 shows a top view of a radiant heater 11, which has a bowl-shaped insulation 12 in a sheet metal shell.
- the edge 13 of this insulation is intended to be pressed onto the underside of a glass ceramic hotplate, so that the radiant heater 11 forms a circular heating zone on this glass ceramic plate.
- a light radiator 15 is arranged, which has the shape of a nearly 360 ° circular tube, the two ends of which are guided parallel to each other to the outside.
- This tube which is made of quartz or quartz glass, is melted at both ends 16 and provided with electrical connections 17, which have one, not shown, lying in the tube, more are connected supported heating coil, which consists of tungsten or another highly heat-resistant electrical resistance material.
- the light emitter can also be polygonal or have other shapes. In the example shown, it runs around the outer circumference of the heating zone and thus creates a circular area inside, which is partially covered with a dark radiator 18.
- this can consist of wire coils made of conventional resistance material, which are laid on the bottom of the insulation 12 by means of also conventional fastening means in zigzag or spiral form.
- Both radiant heaters 15 and 18 are arranged at a distance from the glass ceramic plate and the light radiator 15, possibly supported by it, is also at a distance from the insulation 12.
- a rod-shaped temperature sensor 19 of a temperature limiter 20 runs diametrically over the entire heating zone 14.
- a damping resistor 21 arranged in the area of the heating zone 14 is indicated in the schematic plan view according to FIG. 1.
- This can be a resistor similar to a dark radiator 18, but with a higher load. It can therefore be dimensioned with a relatively high resistance value in length, diameter and arrangement such that it would assume a temperature which was not per se beneficial to it in continuous operation.
- the damping resistor can also be part of the heating or in the form of a conventional resistance heating element of the radiator.
- damping resistors that have a different configuration are also suitable, for example band resistors, sheet resistors or the like.
- damping resistor 21 assign a thermal mass to which it is connected in a heat-conducting manner and which derives the warming that occurs only intermittently on it and thus makes it more uniform.
- An arrangement of a damping resistor outside the radiant heater is also possible.
- FIG. 2 shows a circuit of the radiant heater according to FIG. 1.
- the light radiator 15 is continuously connected in series with the dark radiator 18 and this is additionally preceded by the damping resistor 21.
- the voltage present on both sides of the light radiator 15 is monitored by a damping switching device 22, which is symbolized in the example shown as a voltage relay coil 23 with a switching contact 24 actuated thereby.
- the damping device thus consists of the damping resistor 21 and the damping switching device 22.
- the switching contact 24 can bridge the damping resistor 21 when it is closed.
- the switching contact of the temperature limiter 20 and a clocking power control unit 27 are switched into one of the power supply lines 25, 26.
- This is of the type that is usually referred to as an "energy regulator” and has a switching contact 28 which is actuated in a continuously adjustable manner by a bimetal 29.
- the bimetal is heated by a control heater 30 which is connected in parallel to the radiant heater.
- the power control contact 28 is closed, as is the contact of the temperature limiter 20, while the contact 24 is open, because for the time being the voltage difference on both sides of the light radiator is small, since its internal resistance is still very low due to the cold filament.
- the two upstream resistors 18 and 21 cause the inrush current despite the low resistance in the light beam ler 15 remains limited to a permissible value.
- the resistance increases by about a power of ten (usually 10 to 12 times), so that the voltage drop caused by it also increases and the damping switching device is effective is, for example, the relay coil 23 attracts and thereby closes the contact 24.
- the arrangement works loss-free, since all the heat in the area of the radiant heater is released, and the damping is so short-lived and so low that it hardly affects the effectiveness of the light radiator, which is designed to heat up quickly and give off radiant heat falls.
- a computational example illustrates this: It is assumed that a radiant heater with a total output of 2200 W has a light emitter of 1100 W and a dark radiator of the same power, each in relation to the operating state.
- the operating current at 220 V is 10 A and the resistance of the radiators is 11 ohms each, ie 22 ohms in series. While the temperature coefficient of resistance in the dark radiator is relatively low and is neglected for the purpose of this calculation, the high resistance temperature coefficient of the light radiator causes the resistance in the cold state to drop to a tenth to a twelfth, so that if one takes an average of 1 / 11 takes, the cold resistance of the light radiator is only 1 ohm is.
- FIG. 3 shows a circuit in which a light emitter 15 is connected in parallel with a dark emitter 18.
- the light and dark emitters would each have a resistance of 44 ohms in the operating state, which would drop to 4 ohms when the light emitter was cold, so that the light emitter in the cold state has a current of 55 A equal to approx would draw 12 kW. Together with the dark radiator, this would be 13 kW, which would be highly inadmissible.
- a damping resistance of, for example, 40 ohms would limit the total power to 10 A equal to 2200 W and would create approximately the same heating conditions as described with reference to FIG. 2.
- the damping resistor 21 is therefore connected in series with the light emitter in the strand containing the light emitter, while the dark emitter is parallel to this strand.
- the damping resistor 21 is in turn bridged by a damping switching device 22.
- the use of a parallel connection of light and dark radiators can be advantageous because the resistance of the heating coil in the healing radiator can be higher, which can lead to advantages in the production of the light radiator due to a thinner filament. The same applies to the dark radiator. This can also reduce the response time until the full luminous intensity of the light source is reached.
- a delay circuit 31 is indicated by dash-dotted lines, which can be used instead of the switching device 23 which responds to voltage on the light emitter and which closes the switching contact 24 which is open when the current is switched off only after a set time.
- the usual heating time of up to approx. 2 seconds for the light emitter could be selected as such a time.
- Such a delay switching device could be an electronic or thermal delay switch of a known type.
- FIG. 4 shows a plan view of a two-circuit radiant heater which, with the structure similar to that of FIG. 1, has an inner heating zone 14a and an outer heating zone 14b which are delimited from one another by an intermediate edge 13a.
- each heating zone there is a light radiator 15a, 15b and a dark radiator 18a, 18b.
- the outer light emitter can be designed such that its ends 16 lie on both sides of the ends 16 of the inner light emitter 15a, and the dark emitter 18b can be in the form of a possibly at the exits the light emitter has an interrupted circular ring.
- the damping resistor 21 can be arranged at any point, in the example in the central heating zone 14a.
- the circuit according to FIG. 5 shows that the series circuit of light emitter 15a and dark emitter 18a belonging to the central heating zone 14a is provided without a damping resistor, while the damping resistor 21 is assigned to the heating zone 14b and the heating resistor combination 15b, 18b is connected in series.
- a damping device 22 of the type already described above switches the damping resistor 21 off by short-circuiting after the heating phase of the light radiator 15b.
- the regulation or circuit can be the same as that described with reference to FIG. 2.
- an additional switch (not shown) is provided with which the inner heating zone, which is always in operation when the radiant heater is switched on, can be connected to the outer heating zone 14b as required.
- the inner heating zone usually has a lower power, so that here the damping through the series connection of the dark radiator 18a may be sufficient, while the outer heating zone has a higher power and accordingly the damping resistor ensures a sufficiently low inrush current.
- Fig. 6 shows a circuit of a two-circuit radiant heater, in which only the inner heating zone 14a is assigned a dark radiator 18a in series with the bright radiator 15a rend the outer heating zone 14b contains only a bright radiator 15b, but which is associated with a damping resistor 21, which is switched in the manner described.
- FIG. 7 shows an embodiment of the same type, in which, however, there is no separate damping resistor, but the dark radiator 18c is connected upstream of the two heating elements 15a and 15b of the inner heating zone 14a when switched on.
- An electronic damping circuit is indicated here as a damping circuit, which is preferred over a relay with a voltage coil, because here any fluttering phenomena in the switching range can be avoided with a correspondingly stable threshold value switching.
- Such electronic circuits are generally known. They can be designed in such a way that after a single response (exceeding the voltage threshold value) the device is only switched off again after the entire line has been disconnected from the power supply. This can be done with an additional switch, as shown in Fig. 8 with the reference numeral 35a. The function of this additional switch could also be taken over by the contact of the power control unit.
- An electronic threshold value switching device 22 can also respond to criteria other than the voltage difference on the light radiator or the time.
- a switching device would also be conceivable which actuates the damping device as a function of the direct effect of the light emitters, namely its light emission.
- the device could be controlled by a photodiode or the like.
- the damping switching device belongs to the individual radiant heater, it is preferably arranged (except for the damping resistance) outside the radiant heater, for example at its outer or other locations on the cooking appliance.
- the damping switch operates Direction 22 a contact 24, which is designed as a changeover contact and interrupts the line branch of the outer heating zone 14b at the same time when it switches on the light radiator 15b in the manner described in the line branch of the inner heating zone 14a.
- FIG. 8 shows an embodiment in which there is only one damping resistor 21 in the case of two light emitters 15a, 15b, which is connected upstream of the two light emitters and can be bridged by a device 22 such as that described with reference to FIG. 7.
- the power control takes place in turn with a clocking power control device 27, which, as already mentioned, can additionally actuate a contact 35a, which briefly de-energizes the entire circuit when the outer heating circuit is switched on and thereby reactivates the threshold switch contained in the damping switching device. This shutdown could also be done by the manual switch 35.
- the outer heating zone is switched on as required via the switch 33.
- the electronic switching device 22 is thereby also effective when the light emitter 15b is connected to the light emitter 15a already in operation, so that the damping resistor 21 is then briefly switched on again. It is also advantageous that the damping device somewhat alleviates the optical effect of the light emitter, in particular also in clocked regulation.
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Resistance Heating (AREA)
- Electric Stoves And Ranges (AREA)
- Control Of Resistance Heating (AREA)
- Electric Ovens (AREA)
- Crystals, And After-Treatments Of Crystals (AREA)
- Bipolar Transistors (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE3840360A DE3840360A1 (de) | 1988-11-30 | 1988-11-30 | Strahlungs-heizkoerper |
DE3840360 | 1988-11-30 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0371295A2 true EP0371295A2 (fr) | 1990-06-06 |
EP0371295A3 EP0371295A3 (fr) | 1991-08-21 |
EP0371295B1 EP0371295B1 (fr) | 1996-01-17 |
Family
ID=6368176
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP89120765A Expired - Lifetime EP0371295B1 (fr) | 1988-11-30 | 1989-11-09 | Elément chauffant radiant |
Country Status (9)
Country | Link |
---|---|
US (1) | US5004892A (fr) |
EP (1) | EP0371295B1 (fr) |
JP (1) | JPH02189884A (fr) |
KR (1) | KR900008348A (fr) |
AT (1) | ATE133311T1 (fr) |
AU (1) | AU626943B2 (fr) |
DE (2) | DE3840360A1 (fr) |
ES (1) | ES2081828T3 (fr) |
YU (1) | YU224189A (fr) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2669803A1 (fr) * | 1990-11-27 | 1992-05-29 | Atlantic Ste Fse Developp Ther | Dispositif de chauffage, notamment emetteur d'infra-rouge. |
EP2315493A1 (fr) * | 2009-10-21 | 2011-04-27 | Behr France Rouffach SAS | Dispositif de chauffage notamment pour une climatisation de véhicule automobile |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4002322A1 (de) * | 1990-01-26 | 1991-08-01 | Bosch Siemens Hausgeraete | Kochfeld |
ES2049180B1 (es) * | 1992-09-17 | 1996-11-01 | Eika S Coop Ltda | Mejoras en calefactores radiantes. |
DE4441204A1 (de) * | 1994-11-19 | 1996-05-23 | Ego Elektro Blanc & Fischer | Strahlheizkörper |
GB2307629B (en) * | 1995-11-20 | 2001-01-10 | Strix Ltd | Electric heaters |
KR20040077211A (ko) * | 2003-02-28 | 2004-09-04 | 삼성전자주식회사 | 표시 장치용 광원의 구동 장치 |
FI20070868L (fi) * | 2007-11-15 | 2009-05-16 | Uponor Innovation Ab | Pinnan alaisen lämmityksen/jäähdytyksen säätäminen |
JP4620164B1 (ja) * | 2009-07-15 | 2011-01-26 | 日本調理機株式会社 | 電気回転釜 |
US11098923B2 (en) * | 2016-03-31 | 2021-08-24 | Gd Midea Environment Appliances Mfg Co., Ltd. | Electric radiator |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3516788A1 (de) * | 1985-05-09 | 1986-11-13 | Bosch-Siemens Hausgeräte GmbH, 8000 München | Strahlungsheizeinrichtung fuer kochgeraete, insbesondere fuer glaskeramik-kochmulden |
EP0206597A1 (fr) * | 1985-06-11 | 1986-12-30 | Micropore International Limited | Appareils de chauffage à infra-rouge |
EP0235895A1 (fr) * | 1986-02-01 | 1987-09-09 | Micropore International Limited | Dispositifs de chauffage à radiation |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4421993A (en) * | 1982-05-28 | 1983-12-20 | General Electric Company | Load resistance control circuitry |
US4523429A (en) * | 1983-04-01 | 1985-06-18 | Rca Corporation | Cold start surge current limiting system for a hydrazine thruster augmentation heater |
GB8412339D0 (en) * | 1984-05-15 | 1984-06-20 | Thorn Emi Domestic Appliances | Heating apparatus |
US4700051A (en) * | 1984-09-22 | 1987-10-13 | E.G.O. Elektro-Gerate Blanc U. Fischer | Radiant heater for cooking appliances |
DE3503648C2 (de) * | 1984-09-22 | 1994-08-11 | Ego Elektro Blanc & Fischer | Strahlheizkörper für Kochgeräte |
DE3437726A1 (de) * | 1984-10-15 | 1986-04-17 | Bosch Siemens Hausgeraete | Heizeinrichtung |
DE3526892A1 (de) * | 1985-07-26 | 1987-02-05 | Bosch Siemens Hausgeraete | Anordnung zum anschalten von heizstrahlerkombinationen |
GB8527683D0 (en) * | 1985-11-09 | 1985-12-11 | Thorn Emi Appliances | Control circuit |
DE3726535A1 (de) * | 1987-08-10 | 1989-02-23 | Philips Patentverwaltung | Verfahren zur schaltstossarmen leistungssteuerung elektrischer lasten |
-
1988
- 1988-11-30 DE DE3840360A patent/DE3840360A1/de not_active Withdrawn
-
1989
- 1989-11-09 ES ES89120765T patent/ES2081828T3/es not_active Expired - Lifetime
- 1989-11-09 DE DE58909575T patent/DE58909575D1/de not_active Expired - Fee Related
- 1989-11-09 AT AT89120765T patent/ATE133311T1/de not_active IP Right Cessation
- 1989-11-09 EP EP89120765A patent/EP0371295B1/fr not_active Expired - Lifetime
- 1989-11-23 AU AU45498/89A patent/AU626943B2/en not_active Expired - Fee Related
- 1989-11-24 YU YU224189A patent/YU224189A/sh unknown
- 1989-11-27 KR KR1019890017240A patent/KR900008348A/ko not_active Application Discontinuation
- 1989-11-28 JP JP1306781A patent/JPH02189884A/ja active Pending
- 1989-11-29 US US07/443,559 patent/US5004892A/en not_active Expired - Fee Related
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3516788A1 (de) * | 1985-05-09 | 1986-11-13 | Bosch-Siemens Hausgeräte GmbH, 8000 München | Strahlungsheizeinrichtung fuer kochgeraete, insbesondere fuer glaskeramik-kochmulden |
EP0206597A1 (fr) * | 1985-06-11 | 1986-12-30 | Micropore International Limited | Appareils de chauffage à infra-rouge |
EP0235895A1 (fr) * | 1986-02-01 | 1987-09-09 | Micropore International Limited | Dispositifs de chauffage à radiation |
Non-Patent Citations (1)
Title |
---|
IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS. vol. 24, no. 2, M{rz 1988, NEW YORK US Seiten 322 - 327; T.R. Payne: "Electronic Control System for Infrared Heating Applied to Surface Cooking" * |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2669803A1 (fr) * | 1990-11-27 | 1992-05-29 | Atlantic Ste Fse Developp Ther | Dispositif de chauffage, notamment emetteur d'infra-rouge. |
EP2315493A1 (fr) * | 2009-10-21 | 2011-04-27 | Behr France Rouffach SAS | Dispositif de chauffage notamment pour une climatisation de véhicule automobile |
EP2315493B1 (fr) | 2009-10-21 | 2017-05-10 | Mahle Behr France Rouffach S.A.S | Dispositif de chauffage notamment pour une climatisation de véhicule automobile |
Also Published As
Publication number | Publication date |
---|---|
AU626943B2 (en) | 1992-08-13 |
JPH02189884A (ja) | 1990-07-25 |
KR900008348A (ko) | 1990-06-04 |
DE58909575D1 (de) | 1996-02-29 |
ATE133311T1 (de) | 1996-02-15 |
ES2081828T3 (es) | 1996-03-16 |
EP0371295A3 (fr) | 1991-08-21 |
US5004892A (en) | 1991-04-02 |
YU224189A (sh) | 1992-09-07 |
DE3840360A1 (de) | 1990-05-31 |
AU4549889A (en) | 1990-06-07 |
EP0371295B1 (fr) | 1996-01-17 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
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