EP0007370A1 - Spraybooth for use in electrostatic powder coating - Google Patents
Spraybooth for use in electrostatic powder coatingInfo
- Publication number
- EP0007370A1 EP0007370A1 EP78900198A EP78900198A EP0007370A1 EP 0007370 A1 EP0007370 A1 EP 0007370A1 EP 78900198 A EP78900198 A EP 78900198A EP 78900198 A EP78900198 A EP 78900198A EP 0007370 A1 EP0007370 A1 EP 0007370A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- spraybooth
- interior
- spraychamber
- enclosure
- powder coating
- 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.)
- Withdrawn
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B14/00—Arrangements for collecting, re-using or eliminating excess spraying material
- B05B14/40—Arrangements for collecting, re-using or eliminating excess spraying material for use in spray booths
- B05B14/41—Arrangements for collecting, re-using or eliminating excess spraying material for use in spray booths by cleaning the walls of the booth
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B14/00—Arrangements for collecting, re-using or eliminating excess spraying material
- B05B14/40—Arrangements for collecting, re-using or eliminating excess spraying material for use in spray booths
- B05B14/41—Arrangements for collecting, re-using or eliminating excess spraying material for use in spray booths by cleaning the walls of the booth
- B05B14/412—Arrangements for collecting, re-using or eliminating excess spraying material for use in spray booths by cleaning the walls of the booth wherein the walls of the booth is perforated or porous walls and the walls are cleaned of or prevented from being contacted with excess material by a flow of fluid, e.g. air or water, directed into the booth
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B14/00—Arrangements for collecting, re-using or eliminating excess spraying material
- B05B14/40—Arrangements for collecting, re-using or eliminating excess spraying material for use in spray booths
- B05B14/42—Arrangements for collecting, re-using or eliminating excess spraying material for use in spray booths using electrostatic means
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
Definitions
- This invention relates to a spraybooth spraychamber or enclosure in which the application of dry powder materials for the coating of surfaces is carried out for example by electrostatic coating means.
- oversprayed powder material is encouraged by means of externally induced air movement to be removed from the interior of the spraybooth or spraychamber so that it may be re-used subsequently-
- One of the claimed advantages for the application of dry powder materials in coating processes is the ability to recover the over ⁇ sprayed materials for re-use. In order to realise such advantage fully it is necessary to recover such oversprayed materials each from the other without such materials having become cross contaminated. It is necessary therefore and desirable that each material be applied separately and that when it is desired to change from one material or one colour of material to another such change is carried out efficiently.
- the design of the interior sections of the spraybooth may be such as to provide for such sections upon which th oversprayed powder material may come to rest to be at such angle fro the horizontal plane as to cause all but the minimum of such over ⁇ sprayed materials to fall into the exhaust ventilation ducting and t be removed from the interior of the spraybooth.
- the structure of the spraybooth spraychamber or enclosure may be execute in plastic or similar dielectric material so as to reduce the availa alternative electrical earth attraction which a metal or otherwise electrically conductive spraybooth structure may present to that of the primary electrical earth attraction presented to the charged particles of powder by the articles being coated.
- the present invention has for its object to provide improved means for the reduction of attraction and -retention of oversprayed powder materials upon the interior surfaces of a spraybooth spraychamber or
- Such means preferably comprise an interior surface which is fabricated in whole or in part from materials having a degree of porosity which will permit the movement of gaseous materials to be induced through
- Figure 1 is a schematic side elevational view of an electrostatic powder coating installation operating according to a' conveyorised throughpass technique.
- Figure 2 is a schematic- cross sectional view through an electrostat powder coating installation operating according to a
- FIG. 1 is a schematic side elevational sectional view through an electrostatic powder coating installation operating accord to a conveyorised throughpass technique taken substantiall
- FIG. 1 illustrating an installation or apparatus 10 depicted in Figure 2 the installation will be understood to poss a spraybooth spraychamber or enclosure 11 in the form of a lengthwi extending tunnel, the roof section 11a of which possesses a lengthw
- the spraybooth spraychamber or enclosure 26 is supported upon base section 25 and consists substantially of a structure having an exte non-porous surface 24 separated from an interior porous surface 23 s as to form a space or plenum chamber into which gaseous material ma be introduced by means of suitably positioned inlet connections 27.
- the gaseous materials thus introduced pass through the interior porous surface 23 substantially in the direction indicated by lines 28 and prevent oversprayed powder materials which have not become attached to the articles being coated 15 from becoming deposited upon the interior surfaces of the spraybooth spraychamber or enclosure 23 and assist in transporting such oversprayed powder materials so that they become influenced in the direction indicated by lines 29 and 30 by the ventilating forces created by motorised fan 34 of the dust collecting device 35 and removed from the interior of the spraybooth spraychamber or enclosure 11 through ventilation duct 36.
- a multiplicity of discharge electrodes 33 are positioned in the plenum chamber formed between the Interior surfaces 23 and the exterior surfaces 24 and supplied with high voltage through cable 32 from a power supply 31. Best mode of carrying out the invention
- the invention may be carried into practice in various ways, but the following may be instanced as a convenient practical arrangement of the spraybooth spraychamber or enclosure according to the invention.
- the interior surface having a de ree of porosity is so positioned in relation to the exterior surface of the spraybooth spraychamber or enclosure as to provide a plenum.
- Another convenient practical arrangement for the spraybooth spraychamber or.enclosure according to the present invention would be for a multiplicity of electrical discharge electrodes to be positioned within the plenum formed by the interior and exterior surfaces of the structure and connected to a source of high voltage so that the gaseous material passing into the interior of the spraybooth spraychamber or enclosure becomes ionised with a like polarity of charge to that of the powder materials being employed in the coating process providing further repulsion of the oversprayed powder material from the interior surfaces of the spraybooth spray- chamber or enclosure by means of an electro-magnetic nature. • 195 The multiple discharge electrodes being within the plenum thus reducing the possibility of spark discharge between such electrode and the earthed workpieces or articles being coated.
Landscapes
- Electrostatic Spraying Apparatus (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
Abstract
Une cabine pour le revetement de surfaces par pulverisation electrostatique de matiere en poudre comprend une surface exterieure non-poreuse (24) et une surface interieure poreuse (23). Ces deux surfaces delimitent un volume dans lequel un gaz, par exemple ionise, peut etre introduit pour prevenir ou minimiser la deposition du materiau pulverise en exces sur la surface interieure de la cabine.A booth for coating surfaces by electrostatic powder spraying includes a non-porous exterior surface (24) and a porous interior surface (23). These two surfaces delimit a volume in which a gas, for example ionized, can be introduced to prevent or minimize the deposition of excess pulverized material on the interior surface of the cabin.
Description
SPRAYBOOTH FOR USE IN ELECTROSTATIC POWDER COATING
Technical Field
This invention relates to a spraybooth spraychamber or enclosure in which the application of dry powder materials for the coating of surfaces is carried out for example by electrostatic coating means. Background art
It is known that during the application of dry powder materials by electrostatic means, and particularly by electrostatic spray means, that there is to a greater or lesser extent a varying but significant quantity of oversprayed material which does not become attached to the article or articles being coated at the first application.
Such oversprayed powder material is encouraged by means of externally induced air movement to be removed from the interior of the spraybooth or spraychamber so that it may be re-used subsequently- One of the claimed advantages for the application of dry powder materials in coating processes is the ability to recover the over¬ sprayed materials for re-use. In order to realise such advantage fully it is necessary to recover such oversprayed materials each from the other without such materials having become cross contaminated. It is necessary therefore and desirable that each material be applied separately and that when it is desired to change from one material or one colour of material to another such change is carried out efficiently. To this end it is necessary to remove all trace of the material or colour of material to be changed from the interior surfaces of the spraybooth spraychamber or enclosure being employed in order to contain the powder materials which are oversprayed so that they may be removed and collected for re-use. It is therefore necessary to clean the interior surfaces of the spraybooth spraychamber or enclosure which process is time consuming.
In order that the powder material being employed in the coating process shall remain adhered to the surface of the articles being coated for a sufficient time and with sufficient adhesive force to permit the coated articles to be handled into the next stage of the coating process, for example the fusion by heat processing of the powder layer into an homogeneous cured film, such powder materials are normally of such electrically resistive nature as to prevent the rapid dissipation of the acquired electrostatic charge which would result in losses of desired electrical adhesive forces.
Having become electrostatically charged a significantly high proport of the oversprayed materials which have not become adhered to the articles being coated are attracted to the interior surfaces of the spraybooth spraychamber or enclosure in which the coating process is being carried out. Since the rate of dissipation of the electro¬ static charge upon the particles of material forming the overspray to the surfaces of the interior of the spraybooth spraychamber or enclosure in which they are .being employed is slow and the resultant adhesive forces significant the easy and rapid removal of the powder from such interior surfaces when it is desired to make a colour or material change is difficult and time consuming. Several methods are known whereby it is intended that such difficult or time duration may be reduced or minimised and the cleaning of the interior surfaces of the spraybooth spraychamber or enclosure facilitated. For example the design of the interior sections of the spraybooth may be such as to provide for such sections upon which th oversprayed powder material may come to rest to be at such angle fro the horizontal plane as to cause all but the minimum of such over¬ sprayed materials to fall into the exhaust ventilation ducting and t be removed from the interior of the spraybooth. Alternatively the structure of the spraybooth spraychamber or enclosure may be execute in plastic or similar dielectric material so as to reduce the availa alternative electrical earth attraction which a metal or otherwise electrically conductive spraybooth structure may present to that of the primary electrical earth attraction presented to the charged particles of powder by the articles being coated. This" technique coupled to the reduction in the emission rate of powder materials fr the spraygun or applicator is intended to so limit the quantity of oversprayed material to a level at which such oversprayed material may be permitted to be wasted with a consequential lowering of the economic disadvantage of such wastage. A further alternative variation of the system described employing a spraybooth of plastic or similar construction is for the introductio of metal or otherwise similarly electrically conducting panels or grids into the interior area of the spraybooth which, being both supported upon electrically insulating supports and situated within the electrostatic field caused by the discharge electrodes of the applicators or sprayguns, become charge!with a like polarity to the charge induced upon the powder material being employed so that the
3 _ O
latter become repelled from such panels by the electro-magenetic forces present. The powder material thus repelled is thereby induced to remain in proximity to the articles being coated for a longer
80 period of time with a consequential increase in the quantity of such powder material which is likely to become deposited upon the surfaces of the articles being coated at the first application. Similar electro-magnetic repulsion of the oversprayed material may also be achieved by the positioning of electrostatic discharge
85 electrodes within the interior area of the spraybooth spraychamber or enclosure which emit electrostatic discharge of the same polarity as the charge induced upon the powder materials. In none of the alternative methods described is the electrical attraction and subsequent adhesion of the particles of oversprayed
90 powder materials to the interior surfaces of the spraybooth spraychamber or enclosure prevented. Such attraction and adhesion takes place upon surfaces which are electrically conductive or of a dielectric character whenever there is an electrical potential difference between such surfaces and the charged powder materials.
95 Additionally with the employment of either insulated metal panels or discharge electrodes situated within the interior area of the spraybooth as described a possible spark discharge between such panel or electrode and electrically earthed workpiece can take place with the resultant possible ignition of the cloud of powder materials
100 being employed-
Disclosure of invention
The present invention has for its object to provide improved means for the reduction of attraction and -retention of oversprayed powder materials upon the interior surfaces of a spraybooth spraychamber or
105 enclosure in which coating of articles with powder materials by electrostatic means is carried out.
In the manufacture of the spraybooth spraychamber or enclosure in accordance with the present invention means for the prevention of attraction and deposition of oversprayed powder materials upon the
110 interior surfaces of the spraybooth spraychamber or enclosure are incorporated within the interior surfaces themselves.
Such means preferably comprise an interior surface which is fabricated in whole or in part from materials having a degree of porosity which will permit the movement of gaseous materials to be induced through
115. the interior surface towards the interior of the spraybooth
spraychamber or enclosure by pneumatic, electrical or other means. Brief description of drawings
The invention will be better understood from the following detailed description in conjunction with the drawings wherein -
120 Figure 1 is a schematic side elevational view of an electrostatic powder coating installation operating according to a' conveyorised throughpass technique. Figure 2 is a schematic- cross sectional view through an electrostat powder coating installation operating according to a
125 conveyorised throughpass technique taken substantially alo the line B - B of Figure 1 . Figure 3 is a schematic side elevational sectional view through an electrostatic powder coating installation operating accord to a conveyorised throughpass technique taken substantiall
130 along the line A - A of Figure 2 •
Referring to the drawings illustrating an installation or apparatus 10 depicted in Figure 2 the installation will be understood to poss a spraybooth spraychamber or enclosure 11 in the form of a lengthwi extending tunnel, the roof section 11a of which possesses a lengthw
135 extending slot 12 through which extends the suspension means, for instance in the form of hooks 13, of a conveying device 14 which is guided above roof 11a and suspended by support 22. The articles 15 which are to be coated are suspended by the hooks 13 and enter and leave the spraybooth spraychamber or enclosure through the openings
140 in the end walls.
During the passage of the articles 15 through the spraybooth spraychamber or enclosure they pass the head of a spraygun or applicator 16 which receives through cable 19 the high voltage generated by power supply 20. The high voltage is applied to the
145 powder coating materials which are contained in reservoir 18 and fe through a supply hose 17 to the discharge end of the- spraygun or applicator 16 where they are induced towards the earthed substrate o the articles to be coated 15 substantially in the direction represe ed by lines 21.
150 The spraybooth spraychamber or enclosure 26 is supported upon base section 25 and consists substantially of a structure having an exte non-porous surface 24 separated from an interior porous surface 23 s as to form a space or plenum chamber into which gaseous material ma be introduced by means of suitably positioned inlet connections 27.
The gaseous materials thus introduced pass through the interior porous surface 23 substantially in the direction indicated by lines 28 and prevent oversprayed powder materials which have not become attached to the articles being coated 15 from becoming deposited upon the interior surfaces of the spraybooth spraychamber or enclosure 23 and assist in transporting such oversprayed powder materials so that they become influenced in the direction indicated by lines 29 and 30 by the ventilating forces created by motorised fan 34 of the dust collecting device 35 and removed from the interior of the spraybooth spraychamber or enclosure 11 through ventilation duct 36. Where it is desired to introduce ionised gaseous materials into the spraybooth spraychamber or enclosure to aid and enhance the repulsion of oversprayed materials from the interior surfaces 23 a multiplicity of discharge electrodes 33 are positioned in the plenum chamber formed between the Interior surfaces 23 and the exterior surfaces 24 and supplied with high voltage through cable 32 from a power supply 31. Best mode of carrying out the invention
The invention may be carried into practice in various ways, but the following may be instanced as a convenient practical arrangement of the spraybooth spraychamber or enclosure according to the invention. In this arrangement the interior surface having a de ree of porosity is so positioned in relation to the exterior surface of the spraybooth spraychamber or enclosure as to provide a plenum. The introduction of a gaseous material into such a plenum formed by the interior and exterior surfaces of the structure, where such exterior surfaces are non-porous, resulting in the movement of such gaseous material through the pores of the interior surface of the structure thereby repelling the oversprayed powder material from becoming deposited upon such interior surface. Another convenient practical arrangement for the spraybooth spraychamber or.enclosure according to the present invention would be for a multiplicity of electrical discharge electrodes to be positioned within the plenum formed by the interior and exterior surfaces of the structure and connected to a source of high voltage so that the gaseous material passing into the interior of the spraybooth spraychamber or enclosure becomes ionised with a like polarity of charge to that of the powder materials being employed in the coating process providing further repulsion of the oversprayed powder material from the interior surfaces of the spraybooth spray-
chamber or enclosure by means of an electro-magnetic nature. • 195 The multiple discharge electrodes being within the plenum thus reducing the possibility of spark discharge between such electrode and the earthed workpieces or articles being coated.
The oversprayed powder materials having become prevented from sett upon the interior surfaces of the spraybooth spraychamber or enclo
200 in. the manner described are removed from within the spraybooth spraychamber or enclosure by conventional means such as a dust collecting device inducing powder laden air carrying the overspray powder materials to be exhausted from the interior of the sprayboo spraychamber or enclosure and collected in such dust collecting de
205 in a manner amply described in prior art. Industrial applicability
The use of a spraybooth spraychamber or enclosure in the process o the coating of surfaces with powder materials by electrostatic mea where such spraybooth spraychamber or enclosure is fabricated in t
210 manner herein described is intended to prevent significant deposit of oversprayed powder materials upon the interior surfaces of such spraybooth spraychamber or enclosure causing the time required to spent in the cleaning of such interior surfaces when it is desired make a colour or material change to be minimal or non-existant.
Claims
1. An electrostatic powder coating installation comprising a spraybooth spraychamber or enclosure structure for use with a spraygun or applicator having an interior and exterior
220 surface substantially separated from each other so that the structure is in the form of a plenum chamber or series of plenum chambers.
2. An electrostatic powder coating installation as defined in claim 1 where the interior surface or surfaces of the structure
225 is fabricated from material or materials which are substantially porous and the exterior surface or surfaces is fabricated from material which is substantially non-porous so that gaseous materials introduced into the plenum formed by the interior and exterior surfaces of the structure pass through the interior
230 surface into the interior of the structure.
3. An electrostatic powder coating installation as defined as defined in claims 1 and 2 whose plenum chamber formed by the interior and exterior surfaces of the structure contains a multiplicity of electrical discharge electrodes.
235 4. An electrostatic powder coating installation substantially as hereinbefore described with reference to the accompanying drawings.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB26978 | 1978-01-05 | ||
| GB269/78A GB1588503A (en) | 1978-01-05 | 1978-01-05 | Installation and method for electrostatic powder coating of articles |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP0007370A1 true EP0007370A1 (en) | 1980-02-06 |
Family
ID=9701387
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP78900198A Withdrawn EP0007370A1 (en) | 1978-01-05 | 1979-07-30 | Spraybooth for use in electrostatic powder coating |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP0007370A1 (en) |
| GB (1) | GB1588503A (en) |
| WO (1) | WO1979000478A1 (en) |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA1182997A (en) * | 1980-12-08 | 1985-02-26 | Gunter J. Lissy | Powder spray booth |
| GB2204254A (en) * | 1987-03-24 | 1988-11-09 | Auto Paint Systems Limited | Electrostatic dry-powder spraying |
| JPS644272A (en) * | 1987-06-24 | 1989-01-09 | Hideo Nagasaka | Electrostatic powder coating device |
| SE465454B (en) * | 1990-01-25 | 1991-09-16 | Flaekt Ab | DEVICE FOR THE EFFECT OF GASBORN PARTICLES MOVEMENT OF A MOVABLE DON T EX COATING PARTICULAR MOVEMENT AT A PAINTING MACHINE IN A SPRAYBOX |
| SE467446B (en) * | 1990-11-16 | 1992-07-20 | Ingemar Loeoef | SPRAY BOX WITH RESTRICTIVE SURFACE MATERIALS |
| DE4323312C2 (en) * | 1993-07-12 | 1997-04-10 | Wagner Int | Device for electrically discharging the walls of a plastic cabin |
| WO1997014508A1 (en) * | 1995-10-18 | 1997-04-24 | Michael Eder | Device for transporting finely distributed media produced during the surface treatment of articles |
| FR2765077B1 (en) * | 1997-06-25 | 1999-09-10 | Ifremer | IMPROVEMENT IN ELECTROSTATIC SMOKING DEVICES FOR MEAT FOOD PRODUCTS |
| DE19805514A1 (en) * | 1998-02-11 | 1999-08-19 | Wagner Int | Powder coating plant with coating cabin |
| ITBO20030637A1 (en) * | 2003-10-28 | 2005-04-29 | Symach S R L | PAINTING OVEN CABIN WITH HEATING SYSTEM |
| ITBG20130015U1 (en) * | 2013-04-24 | 2014-10-25 | Trasmetal Spa | IMPROVED CAB FOR POWDER COATING OF MANUFACTURES |
| CN115155896A (en) * | 2022-08-15 | 2022-10-11 | 山东东宏管业股份有限公司 | Fluidized cleaning-free floating powder recycling structure and spraying system |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3741155A (en) * | 1970-08-21 | 1973-06-26 | Minnesota Mining & Mfg | Apparatus for particulate coating of an elongate article |
| GB1336872A (en) * | 1971-01-13 | 1973-11-14 | Volstatic Ltd | Removing and reclaiming particulate material lodged in spraying plant |
| BE789579A (en) * | 1971-10-06 | 1973-02-01 | Masuda Senichi | ENCLOSURE FOR THE APPLICATION, BY MEANS OF A CURTAIN OF ELECTRICAL FIELDS OF THE CONTACT TYPE, OF COATINGS FORMED BY ELECTROSTATIC CHARGED POWDERS |
| US3904346A (en) * | 1971-12-23 | 1975-09-09 | Leslie Earl Shaw | Electrostatic powder coating process |
| CH560558A5 (en) * | 1973-10-31 | 1975-04-15 | Elfag Holding | Electrostatic spray coater booth - air curtain over inwall leads out to blower suction-side outlet |
| CA997197A (en) * | 1973-12-07 | 1976-09-21 | Volstatic Of Canada Limited | Aerated surface structure |
| CH564376A5 (en) * | 1974-02-01 | 1975-07-31 | Elfag Holding | Electrostatic powder coating chamber with protected wall - non-turbulent air curtain blown in through microporous surface |
-
1978
- 1978-01-05 GB GB269/78A patent/GB1588503A/en not_active Expired
- 1978-10-02 WO PCT/GB1978/000017 patent/WO1979000478A1/en unknown
-
1979
- 1979-07-30 EP EP78900198A patent/EP0007370A1/en not_active Withdrawn
Non-Patent Citations (1)
| Title |
|---|
| See references of WO7900478A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| GB1588503A (en) | 1981-04-23 |
| WO1979000478A1 (en) | 1979-07-26 |
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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 |
|
| AK | Designated contracting states |
Designated state(s): FR |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
| 18D | Application deemed to be withdrawn |