Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F21—LIGHTING
  • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
  • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
  • F21V29/50—Cooling arrangements
  • F21V29/60—Cooling arrangements characterised by the use of a forced flow of gas, e.g. air
  • F21V29/67—Cooling arrangements characterised by the use of a forced flow of gas, e.g. air characterised by the arrangement of fans
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F21—LIGHTING
  • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
  • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
  • F21V29/50—Cooling arrangements
  • F21V29/70—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks
  • F21V29/74—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F26—DRYING
  • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
  • F26B3/00—Drying solid materials or objects by processes involving the application of heat
  • F26B3/28—Drying solid materials or objects by processes involving the application of heat by radiation, e.g. from the sun
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F21—LIGHTING
  • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
  • F21W2131/00—Use or application of lighting devices or systems not provided for in codes F21W2102/00-F21W2121/00
  • F21W2131/40—Lighting for industrial, commercial, recreational or military use
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F21—LIGHTING
  • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
  • F21Y2103/00—Elongate light sources, e.g. fluorescent tubes

Definitions

• the invention relates to an electromagnetic irradiation device comprising:
• a source of electromagnetic radiation comprising:
• a radiation emitter "at least two lateral reflectors located at a distance from the emitter on either side of it, and each comprising a reflective front face facing the emitter, and a rear face, l the emitter and the reflectors being arranged so as to direct the radiation towards an exhibition space having a central part, the two reflectors being separated from each other by a slot,
• Means for cooling the reflectors allowing the passage of a cooling fluid on the side of the rear face of the reflectors on the one hand, and through the slot on the side of the front face of the reflectors on the other hand,
• Apparatuses with visible and / or ultraviolet and / or infrared radiation are known for applications such as drying of paints, varnishes, inks, baking of powders such as epoxy, Rilsan (registered trademark), etc., and such that the sterilization of solid products in sheets, fluids of a food nature, syrup, water, etc ...
• the reflectors consist of concave metal sheets, one side of which is reflective. They form two portions of the same ellipse, the slit occupying the top of the ellipse.
• the emitter tube is located parallel to the slit, and its axis is placed at the focal point of the ellipse closest to the slit.
• the thermal energy released by the radiation source simultaneously with the photochemical energy tends to dry out the product subjected to radiation. If we take the example of an application to the printing press, the source may very well irradiate areas of the paper on which the product to be polymerized has not been printed, in which case the substrate (for example paper) being exposed, air and heat cause a local drop in humidity, which will change the structural behavior of the substrate. This constraint limits the power of the device in certain applications.
• An objective of the invention is to allow sufficient cooling of a radiating device of the above type, in a restricted space confined in a casing. Another objective is to allow ventilation and, if necessary, sufficient cooling of the space subjected to radiation without reducing the photonic energy released. Another objective is to increase the power of the radiation source, in a given volume, without subjecting the radiation source itself and / or the object subjected to the radiation to excessive heating, by simple means. According to the invention, these objectives are achieved by means of an irradiation device comprising:
• the middle part of the exhibition space is that which is subjected to the highest temperatures. Thanks to the invention, it is swept by the cooling fluid opening both through the expulsion orifices and through the slot, which contributes to its cooling.
• the circulation of the cooling fluid between the rear face of the reflectors and the support structure allows increased heat exchange, and in particular limits heating of the support structure.
• the coolant can be the ambient air in the room or a neutral gas, such as nitrogen, for the products to be inerted. Alternatively, it can also be air with a high relative humidity rate, favoring the temperature drop by the use of latent heat of vaporization, or cold air at a temperature below 20 ° C or below 0 ° C, or even demineralized liquid water at room temperature.
• the reflectors are provided, on the side of their face posterior, of a multitude of cooling streaks, such that the exchange surface formed by the rear face of the reflectors is significantly greater than the reflecting surface formed by the front face of the reflectors.
• the housing has shaped walls, so that the cavity which they constitute with the rear face of each reflector is a sinuous cavity to considerably increase the heat exchange capacity.
• the reflector will be subjected to a surface treatment by a nickel deposit increasing by about 10 times the thermal emissivity capacity on the back of the reflector compared to bare aluminum.
• the small ridges and the complementary conformation of the support structure allow an increase in the exchange surfaces both on the reflector side and on the support structure side, hence a greater cooling capacity.
• the sinuous cavity has a substantially constant thickness.
• the support structure comprises a pipe for distributing the coolant disposed parallel to the slot.
• the device comprises at least one path connecting each sinuous cavity to the pipe.
• the pipe is separated from the cavity by an intermediate wall comprising one or more communication orifices constituting the fluid path connecting the sinuous cavity to the pipe.
• the section of the expulsion port (s) is substantially smaller than the section of the communication port (s).
• the intermediate wall has at least one orifice connecting the pipe to the slot.
• This orifice can moreover be one of the preceding communication orifices.
• the rear face of the reflector comprises at minus a stop bearing on a complementary stop formed in the structure, the result of the forces due to the pressure exerted by the fluid on the rear face of the reflector tending to increase the force exerted by the stop on the opposite stop.
• the device thus allows a good distribution of mechanical and thermal stresses between the reflectors and the support structure.
• the device comprises motorized means normally external to the irradiation device, imposing a forced circulation of the fluid in the pipe.
• motorized means can be integrated into the supporting structure or separated from the latter by a fluid supply pipe.
• the device comprises a nebulizer projecting into the fluid a liquid in fine droplets.
• the nebulizer is preferably placed between the motorized means and the fluid distribution pipe.
• the nebulized liquid vaporizes, on the one hand in contact with the emitting tube which it bypasses while flowing towards the anterior face, and on the other hand when passing through the cavity formed between the reflectors and the supporting structure, thus absorbing a considerable heat corresponding to its own latent heat of vaporization, and contributing to the cooling of the emitter and the walls.
• the vaporized liquid is demineralized water, which makes it possible to control the humidity level in the exhibition space and to avoid drying out of the objects subjected to radiation, or to accelerate the polymerization of certain inks or varnish.
• the source of electromagnetic radiation constitutes a unitary unit assembled slidingly and in support according to two orthogonal axes in the aeraulic carrying structure by means of bearing surfaces sliding on supports, and sliding rails sliding on bosses.
• Figure 1 shows a cross section of a device according to the invention
• Figure 2 shows an exploded and cutaway perspective of the device of Figure 1;
• Figure 3 shows a side view of the device of Figure 1;
• Figure 4 shows a section of the part of the device shown in Figure 2; • Figure 5 shows a detail of an alternative embodiment of the invention.
• a radiating device 10 comprises a supporting structure 12 constituted by an A-shaped profile of aluminum or steel protected by an insulating coating, and an intermediate wall 14 delimiting a posterior volume constituting a longitudinal pipe 16 of rectangular section and an anterior volume constituting a housing 18 approximately in the shape of an inverted U, open on one of its sides.
• One end of the pipe 16 is provided with an air outlet 20 allowing a supply of cooling fluid.
• the aluminum profile was subjected to a hard anodic oxidation treatment of approximately 50 ⁇ , the surface protection layer thus formed making it possible to resist on the one hand to all mechanical shocks, and on the other hand give the part a high electrical resistance to leakage currents from the environment of the machine on which the radiating device is mounted, as well as to possible short-circuit currents circuit inside this same radiating device.
• the earth connection of the irradiation device is separate from the earth connection of the machine.
• the intermediate wall 14 includes orifices 22 of variable sections staggered on either side of a median plane 24 of the support structure, these orifices 22 providing as many openings between the pipe 16 and the anterior housing 18 of the structure 12.
• the intermediate wall 14 is provided with two supports 26 placed on either side of the median plane 24 and projecting towards the inside of the anterior volume 18.
• the two lateral walls delimiting the front volume 18 of the structure each have on their external face a longitudinal groove 28 of circular section, corresponding to a boss 30 formed inside the front volume 18.
• the front volume 18 of the structure 12 is occupied by radiating means comprising a transmitter 32 located in the median plane of the structure, and two lateral reflectors 34 located on either side of the transmitter 32 and at a distance therefrom ci, symmetrically with respect to the median plane.
• the emitter 32 is a Xenon or Krypton, or neon, or other gas lamp with comparable properties, composed of a cylindrical tube 36 made of transparent quartz, inside which is placed a plasma cylinder emitting in the ultraviolet and / or visible and / or infrared.
• the interest of such an emitter is its impulse nature.
• the variation of the electrical power supply parameters of the generator makes it possible to simultaneously mix UV wavelengths with those of infrared IR in desired proportions, and this at each flash on the same radiated surface.
• first UV flash followed by a second IR flash, or the reverse, or alternatively, a first UV flash combined with a certain amount of IR in less proportion, then followed another IR flash combined with a lesser amount of UV on the same radiated surface.
• a first UV flash combined with a certain amount of IR in less proportion
• another IR flash combined with a lesser amount of UV on the same radiated surface.
• Each of the axial ends of the tube is provided with a ceramic tip 38 provided with an external electrical connector 40 connected to an electrode 42 inserted in the tube.
• the transmitter 32 can also advantageously consist of a Mercury lamp or its derived metal iodides.
• a positioning flange 44 At each longitudinal end of the front volume 18 of the supporting structure 12 is disposed a positioning flange 44, visible in FIGS. 2 and 4, and comprising lateral slides 46 which are positioned by sliding on the two lateral bosses 30.
• Each flange has a notch 48 in U whose opening is turned towards the intermediate wall, and an internal reflecting surface 48a of the flange 44 bringing the radiation from the source 36 towards the radiated plane to eliminate the effects of edges.
• This notch has a shoulder 47 visible in FIG. 4, and a wider part allowing the positioning of an openwork holding part 49.
• This retaining part 49 can also advantageously be replaced by a part made of Teflon or similar material of a thickness and a diameter sufficient to accommodate the O-ring of the ceramic end piece 38 having the same geometrical outline as the part. 44 thus ensuring symmetry with respect to the axis 54.
• the retaining piece 44 can advantageously be replaced in the outer plug 72 by a blind hole positioned in the axis of symmetry of the lamp.
• the outer 72 and inner 74 caps form a single molded piece of insulating material.
• the ceramic tip of the lamp can then be held in the blind hole of the plug 74, either by an O-ring or by an elastomeric binder insensitive to UV and resistant to temperature.
• the intermediate wall 14 comprises, at the height of the connection between the tail of the electrode and the ceramic end piece, a large opening 50.
• the flange is itself perforated by openings 41.
• Each of the reflectors 34 is constituted by a metal profile, in particular of aluminum or steel, comprising a concave reflecting front face 52. Viewed in section in a plane perpendicular to the axis 54 of the cylindrical tube 36, the reflection surfaces 52 of the two reflectors 34 conform to the envelope of the same ellipse, the focus of which would be located on the axis 54 of the cylindrical tube.
• Each of the reflectors 34 is provided, on the side of its rear face 56, with a main fin 58 of large dimension, and cooling grooves 60 forming asperities of smaller dimensions.
• a bearing surface 62 contributes to the positioning of the reflector in the carrying structure 12 and abuts against the corresponding support 26 of the intermediate wall 14.
• Two edges 64 adjacent to the two reflectors 34 delimit a longitudinal slot 66 parallel to the axis 54 of the tube 36.
• a space is formed between the slot 66 and the intermediate wall 14, which opens laterally on the orifices 22.
• air speed in line 16 is faster than at the other opposite end at the level of the electrical connection socket 78, where the speed tends to be zero.
• the orifices 22 are of passage section larger where the pressure is lower. The passage section of these orifices 22 gradually decreases to the other opposite end 78 where the pressure is greater, so as to make the transverse air flow after the intermediate wall 14 homogeneous.
• the two flanges 44 receive the ends of the lateral reflectors 34 so as to position them longitudinally in the front housing 18.
• the cooling air is conveyed on the back of the reflectors 34 with a pressure greater than the pressure drop due to the flow of air in the air passage 17.
• the presence of the rib 58 and the hooked end flange 59 increases the moment of inertia of the reflector 34 relative to the thrust axis of the air pressure on the back of the reflector, so as to avoid any deformation of the reflector 34 in extruded profile.
• the rigorous rectilinear maintenance of the reflector 34 for irradiation devices of great lengths (up to 4 meters), in particular in industries producing cardboard or textile webs, is guaranteed by the rib 58, the reflector being supported. 34 on the stop 26 of the intermediate wall 14.
• the two reflectors 34 remain perfectly symmetrical and immobile with respect to the axis 24, since the opposite thrusts cancel each other out.
• each reflector 34 is shaped according to a very efficient heat exchanger. To do this, the whole of the reflector 34 is covered with a layer of nickel allowing the emissivity coefficient to be multiplied by 10. heat compared to a bare aluminum surface. In addition, wherever the cooling air licks the back of the reflector 34, the radiative surface has been increased by small streaks 60 staggered in three places: the top of the reflector, on the rib 58 and on the slope at 15 ° in middle and bottom of reflector 34.
• the intermediate wall 14 retains in its central part by the housing 15 a longitudinal reflective aluminum strip 68, retained by two supports 15 'and facing the tube 36 through the slot 66.
• Each end of the supporting structure 12 is further provided with an outer plug 72 and an inner plug 74, visible in FIGS. 2 and 4.
• the outer plug 72 ensures the closing of the pipe 16. It is provided with four pins 76 coming to be inserted in circular grooves of the supporting structure.
• the internal plug 74 achieves in a rounded shape the 90 ° change of direction of the cooling fluid and, by construction, sufficient electrical insulation to seal off the electrical connection point of the lamp with its supply cable.
• the plugs 72, 74 are made of plastic, so as to match the shapes of the profile by embedding, while strengthening the electrical insulation.
• the end of the structure opposite the air outlet is provided with a multi-pin electrical outlet 78, shown in FIG. 5, for lamp supply voltages less than or of the order of 3000 volts. Beyond these values, that is to say up to 10,000 volts or more, the electrical conductors pass through the ventilation duct which provides additional isolation security with regard to people.
• the air outlet 20 is connected by a tube 99 downstream of a ventilator 96, shown diagrammatically in FIG. 3.
• the device is further provided with a vaporizer 98 situated at the outlet of the ventilator, which makes it possible to discharge towards the air outlet 20 and the air duct 16 containing a mist of fine suspended water droplets.
• the vaporizer 98 can be arranged directly in the vicinity of the air outlet 20.
• the assembly of the device is carried out as follows:
• the longitudinal ends of the reflectors 34 are integral with the flanges 44 by means of eight pins 53 housed in the holes 55 formed in the end returns 59, and passing through holes 45 in the two flanges 44.
• the electrical connection of the transmitter 32 s 'effecting at one end of the radiating device, the electrical supply wire on the other side of the lamp is brought back to the electrical connection side by housing it in the hole 57 of the reflector 34.
• the hole 57 on the other reflector 34 is used to house a bare ground conductor wire.
• the two end flanges 44, the two reflectors 34 and the emitter 32 constitute a unitary sub-assembly, mechanically and electrically integral, which can be inserted by sliding along the bosses 30 in the anterior volume 18 of the structure 12, the bearing surfaces 62 sliding on the supports 26.
• This sub-assembly is therefore largely dissociated, from a mechanical, electrical, thermal and a (2015) point of view, from the supporting structure 12.
• a continuous space is formed between each lateral reflector 34 and the side wall opposite the support structure 12, this space opening on the anterior side by a slot 80 located between the front edge of each reflector and the corresponding edge of the wall of the support structure 12, and, on the side posterior, through the orifices 22 made in the side wall.
• the pins 53 which hold the reflectors 34 integral with the flange 44 protrude on the rear face of the latter of a length such that they abut on the internal face 73 of the inner plug 74, the plastic material of which is sufficiently elastic to absorb the expansion of the reflectors 34.
• the external grooves 28 of the supporting structure make it possible to introduce the device 10 like a drawer into a machine element provided with complementary parallel slides.
• the compactness, maneuverability and unity of the unit make it possible to envisage in standard exchange the total replacement of the device during maintenance or interventions, rather than a repair or partial replacement of one of the components of the 'apparatus.
• a cooling fluid is introduced into the pipe through the mouth 20.
• the orifices 22 have a variable section from the end comprising the mouth 20 towards the opposite end, so as to compensate for the pressure variation along the pipe 16 and to produce a flow of fluid of substantially constant flow at the passage of the orifices 22.
• a part of the fluid flow passes through the slot 66 towards the space exposed to the radiation, where it participates in a heat exchange with the reflecting faces 52 of the reflectors and with the tube 36.
• Another part of the flow follows the sinuous path formed between the side walls of the structure 12 and the rear faces 56 of the reflectors 34 and emerging through the slots 80, which orient the outgoing flow approximately towards the median plane 24 of the irradiated space.
• This part of the fluid performs a heat exchange with the rear face 56 of the reflectors, which is important due to the length of the path 17 traveled which contributes both to increasing the exchange surface and slow down the fluid.
• the small streaks 60 and the nickel coating also contribute to increasing this heat exchange.
• the openings 50 and 41 allow a flow of the fluid, and therefore cooling.
• the reflective strip 68 allows a reflection of the radiation which escapes from the slot 66. It also isolates the intermediate wall 14 from any contact with infrared radiation which would be liable to cause a localized rise in temperature of the profile constituting the support structure 12, and to generate heterogeneous deformations of the elements.
• the supports 26 oppose the mechanical thrust generated by the pressurized fluid along the rear faces of the reflectors 34, and thus guarantee the existence of a slot 66 of constant and homogeneous width between the adjacent edges 64 of the two reflectors 34, whatever the airflow thrust.
• the expression cooling used hitherto is a deliberately generic expression.
• the radiation emitter comprises plasmas sensitive to thermal shocks, such as for example the lighting of the lamp, or a strong temperature gradient of the quartz envelope, which essentially concerns the plasmas formed by Mercury, Gallium and / or Lead, Iron and / or Cobalt, and / or other metallic iodides of the same nature, then the cooling of the emitter will be limited to the use of ambient air in the room or neutral gases, such as nitrogen, for the products to be inerted.
• the radiation emitter comprises plasmas almost insensitive to thermal shocks, such as those formed by xenon, krypton, or by other associated ionizing gases of the same kind
• a neutral gas by nature antioxidant insofar as the emitter is cold plasma
• the hot plasma emitter is provided with a jacket of demineralized cooling water as it has previously described, either air at a relative humidity level thanks to the water vaporizer, preferably demineralized water, favoring the temperature drop by the use of latent heat of vaporization, or air at temperature below 20 ° C or below 0 ° C, or even demineralized water at room temperature, in which the radiating element is immersed.
• Demineralized water offers electrical resistivity allowing the conductive ends of the lamp to be in contact with the cooling water without the risk of electrical faults.
• the vaporization of water through the slot 66 makes it possible to obtain a strong temperature gradient between the internal wall of the quartz tube 36 which is in contact with the plasma at approximately 5000 ° K to 7000 ° K, and the external wall which can be in direct contact with water at 20 ° C without causing any modification of the plasma either in its spectrum or in the amount of energy released in the wavelengths considered.
• the thermal energy released simultaneously with the photochemical energy tends to dry out the product subjected to radiation. If we take the example of an application to the printing press, radiant device
• the 10 may very well irradiate areas of the paper on which the product to be polymerized has not been printed, in which case the substrate (for example paper) being exposed, the air and the heat are the cause of a localized fall humidity, which will modify the structural behavior of the substrate.
• the substrate for example paper
• the expulsion slots 80 formed between the side reflectors and the edges of the side walls of the support structure 12 are shaped so as to direct the air expelled from the sinuous path formed between the side walls towards the median plane 24 of the support structure 12 of the structure 12 and the rear face 56 of the reflectors.
• FIG. 5 An alternative embodiment is presented in FIG. 5.
• a certain length for example 1 meter
• the thrust exerted by the air leaving the slot 66 and arriving on the cylindrical tube 36 can cause a deformation of the tube 36.
• the wire 94 of the loop 90 is of a very small diameter to show flexibility (1 / 10th of a mm up to about 10 ⁇ m). It is capable of withstanding temperatures above 900 ° C.
• the wire can be made of chrome / molybdenum, or better made of quartz fibers which are of the same nature as the lamp tube, transparent and with a low rate of expansion. .
• the pipe 16 constituting the posterior volume of the supporting structure can be of rectangular section, as indicated in the embodiment, but also of any geometric shape, for example circular, ovoid, or square.
• the supporting structure 12 can be made of any metallic or composite material having the desired mechanical, electrical and thermal behavior characteristics.
• the pipe 16 can be separated from the support structure 12 and attached thereto, which makes it possible to constitute the pipe 16 in a material different from that of the structure 12.
• the support structure can thus have for example a d-shaped section 'H, with a housing for the radiating means, and a housing for an attached tubular pipe made of thermosetting plastic material. In such a configuration, it is useful to provide flanges for holding the pipe which do not constitute excessive thermal bridges between the structure and the pipe.
• the shape of the concave reflection surface formed by the two reflectors 34 can be, seen in a plane perpendicular to the axis of the tube, a parabola whose focal point would be the axis of the cylindrical tube.
• the tube 36 can be slightly offset from the focus on the concave surface.
• Reflectors 34 can also take a form approaching that of an ellipse or a parabola, for example a broken form constituted by arcs of circles and / or segments of straight lines.
• the length of the reflectors 34 cannot exceed a certain dimension.
• a large structure 12 for example several meters, it is possible to have end to end sections of reflectors thus producing a longitudinal surface of homogeneous reflection.
• the radiation emission method can be arbitrary.
• the emitter lamp can either be filled with a low-pressure neon-type gas, or fitted with an axial filament aligned with the focal line and emitting in the infrared and / or the visible, replacing the plasma cylinder.
• the quartz tube can be replaced by a glass tube.
• the tube may not be strictly cylindrical.
• the mouth 20 for supplying the pipe with fluid can be placed in one of the external plugs, in the longitudinal axis of the support structure. It can also be arranged on a lateral face. It can also be positioned halfway between the longitudinal ends of the pipe, which naturally requires in this case a different distribution of the orifices.
• the emitter 32 can be cooled with water, and the cooling fluid through the slot 66 is an inert antioxidant gas, in particular nitrogen.

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• Engineering & Computer Science (AREA)
• General Engineering & Computer Science (AREA)
• Life Sciences & Earth Sciences (AREA)
• Microbiology (AREA)
• Mechanical Engineering (AREA)
• Physical Or Chemical Processes And Apparatus (AREA)
• Radiation-Therapy Devices (AREA)
• Paper (AREA)
• Coating Apparatus (AREA)
• Drying Of Solid Materials (AREA)

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• 1999
  • 1999-09-06 FR FR9911243A patent/FR2798187B1/fr not_active Expired - Fee Related
• 2000
  • 2000-09-06 CN CN00812526A patent/CN1372626A/zh active Pending
  • 2000-09-06 EP EP00962577A patent/EP1216383A1/de not_active Withdrawn
  • 2000-09-06 CA CA002383813A patent/CA2383813A1/en not_active Abandoned
  • 2000-09-06 WO PCT/FR2000/002457 patent/WO2001018447A1/fr not_active Application Discontinuation
  • 2000-09-06 AU AU74253/00A patent/AU7425300A/en not_active Abandoned

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