EP0330804A1 - Roller blind, having a braking device with centrifugal masses arranged outside the roller and an end support including this braking device - Google Patents
Roller blind, having a braking device with centrifugal masses arranged outside the roller and an end support including this braking device Download PDFInfo
- Publication number
- EP0330804A1 EP0330804A1 EP88830073A EP88830073A EP0330804A1 EP 0330804 A1 EP0330804 A1 EP 0330804A1 EP 88830073 A EP88830073 A EP 88830073A EP 88830073 A EP88830073 A EP 88830073A EP 0330804 A1 EP0330804 A1 EP 0330804A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- roller
- blind
- brake
- wheels
- centrifugal
- 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- Withdrawn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
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
- E06B9/00—Screening or protective devices for wall or similar openings, with or without operating or securing mechanisms; Closures of similar construction
- E06B9/56—Operating, guiding or securing devices or arrangements for roll-type closures; Spring drums; Tape drums; Counterweighting arrangements therefor
- E06B9/80—Safety measures against dropping or unauthorised opening; Braking or immobilising devices; Devices for limiting unrolling
- E06B9/82—Safety measures against dropping or unauthorised opening; Braking or immobilising devices; Devices for limiting unrolling automatic
-
- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
- E06B9/00—Screening or protective devices for wall or similar openings, with or without operating or securing mechanisms; Closures of similar construction
- E06B9/56—Operating, guiding or securing devices or arrangements for roll-type closures; Spring drums; Tape drums; Counterweighting arrangements therefor
- E06B9/80—Safety measures against dropping or unauthorised opening; Braking or immobilising devices; Devices for limiting unrolling
- E06B2009/807—Brakes preventing fast screen movement
Definitions
- the present invention relates to roller blinds of the type comprising a horizontal roller for supporting the blind and mounted for rotation about its own axis, a blind having an upper edge fixed to the roller and a free lower edge, resilient means tending to bias the roller towards a position in which the blind is rolled up, and a centrifugal-mass brake for slowing the rotation of the roller during rolling up of the blind.
- the centrifugal-mass brake is located within the roller.
- maintenance operations on the brake involve the taking down of the blind and the extraction of the mechanism within the roller.
- Another problem of this known technique lies in the fact that, upon rewinding of the blind, the roller transmits vibrations to the brake mechanism, which disturb the uniformity of its braking. Finally, it is not possible to intervere quickly on the braking mechanism to adjust it.
- the object of the invention is to produce a roller blind of the type indicated at the beginning of the present description, which is able to avoid all the above problems.
- the main characteristic of the blind according to the invention lies in the fact that the centrifugal-mass brake is carried by a fixed support structure, outside the roller, and in that the rotor of the brake is connected to the roller through the interposition of step-up wheels and a one-way clutch device adapted to break the connection between the brake rotor and the roller when the blind is lowered, the step-up wheels and the one-way clutch device being carried by the fixed support structure, outside the roller.
- the one-way clutch device has an output shaft for coupling to the roller of the blind, which is easily adaptable to any type of roller. Furthermore, since the centrifugal-mass brake is located outside the roller, maintenance operations on the brake can be carried out easily and rapidly, and it is also possible to provide a device for adjustment of the brake which is easily accessible from outside. Since the brake is not associated with the roller of the blind, there are no problems resulting from vibrations of the roller during rolling up of the blind.
- the end support of the roller containing the centrifugal-mass brake is very adaptable to any type of roller.
- Figure 1 shows a roller blind 1 comprising a horizontal roller 2 for supporting the blind, mounted for rotation about its own axis by means of two brackets 3 screwed to the wall.
- the sheet of the blind is indicated 4 and has an upper edge (not visible in the drawings) which is fixed to the roller 2 and a free lower edge provided with a stiffening rod 5.
- roller 2 (the right-hand end in Figures 1, 3) carries a cylindrical body 5 which is supported for rotation on a shaft 6. Between the body 5 and the shaft 6 is interposed a helical spring 7 tending to bias the roller towards the position in which the blind is rolled up.
- the shaft 6 ends a certain distance from the end of the tube 2 carrying the cylindrical body 5.
- One end of the shaft 6, which projects axially from the roller, is indicated 8 and is intended to be fixed in a corresponding seat of the respective support bracket 3.
- the usual ratchet gear which enables the blind to be locked in any position against the action of the spring 7 is housed within the body 5. This mechanism is not illustrated in detail in the present description, since it is of known type and does not fall within the scope of the present invention.
- the opposite end of the tube 2 is provided with a closure element 9 having an axial cavity 10 of non-circular section, for example, of hexagonal section.
- a correspondingly-sectioned output shaft 11 of a one-way clutch device 12 situated within a fixed hollow support structure 13 is engaged in the cavity 10.
- the loading of the springs 20 can be adjusted by acting on eccentric pins 21.
- the pins 21 may be carried by screws whose heads are accessible from outside, so as to enable the operator to adjust the brake easily.
- the shaft 17 carries a gear 22 which meshes with a further gear 23 of larger diameter carried by a shaft 24 mounted rotatably within the structure 13 and coaxial with the output shaft 11.
- the two shafts 24, 11 are connected to each other by means of the clutch device 12 which comprises two wheels 25 having frontal teeth meshed together, one of which is joined to the shaft 24, while the other is coupled for rotation with the shaft 11 but is axially slidable on a splined portion 26 thereof.
- a helical spring 27 tends to keep the two wheels meshed together.
- the pair of gears 22, 23 constitute step-up wheels which tend to rotate the rotor 16 of the brake 14 at a fairly high rate. Consequently, at this stage, the centrifugal masses 19 would tend to exert a braking action which would inconveniently impede the action of the operator.
- the clutch device 12 operates at this stage, however, to enable the output shaft 11 and consequently the roller 2 of the blind to rotate in steps, while the shafts 17, 24 are held in a fixed position by the brake.
- the clutch device 12 When the operator rewinds the blind under the action of the spring 7, however, the clutch device 12 remains in the position in which the shafts 24, 11 are connected, so that the rotor of the brake rotates at a fast rate and exerts the required braking action.
- roller blind according to the invention has the advantage of enabling easy and rapid execution of maintenance and adjustment operations on the brake associated with the blind.
- the output end of the shaft 11 may easily be adapted to any type of roller, a closure element, such as that indicated 9 in the appended drawings, being provided at the end thereof.
- the wheels 22, 23 can easily be replaced to achieve whatever transmission ration is required.
Abstract
A roller blind comprising a horizontal roller (2) for supporting the blind and mounted for rotation about its own axis, a blind (4) having an upper edge fixed to the roller and a free lower edge, resilient means (7) tending to bias the roller (2) towards a position in which the blind is rolled up, and a centrifugal-mass brake (14) for slowing the rotation of the roller (2) during rolling up of the blind. The centrifugal-mass brake (14) is carried by a fixed support structure (13) outside the roller and the rotor (16) of the brake is connected to the roller (2) through the interposition of step-up wheels (22, 23) and a one-way clutch device (12) adapted to break the connection between the rotor (16) of the brake (14) and the roller (2) when the blind is lowered, the one-way clutch device (12) and the step-up wheels (22, 23) also being carried by the fixed support structure, outside the roller (2).
Description
- The present invention relates to roller blinds of the type comprising a horizontal roller for supporting the blind and mounted for rotation about its own axis, a blind having an upper edge fixed to the roller and a free lower edge, resilient means tending to bias the roller towards a position in which the blind is rolled up, and a centrifugal-mass brake for slowing the rotation of the roller during rolling up of the blind.
- According to conventional techniques, the centrifugal-mass brake is located within the roller. As a result, maintenance operations on the brake involve the taking down of the blind and the extraction of the mechanism within the roller. Another problem of this known technique lies in the fact that, upon rewinding of the blind, the roller transmits vibrations to the brake mechanism, which disturb the uniformity of its braking. Finally, it is not possible to intervere quickly on the braking mechanism to adjust it.
- The object of the invention is to produce a roller blind of the type indicated at the beginning of the present description, which is able to avoid all the above problems.
- The main characteristic of the blind according to the invention lies in the fact that the centrifugal-mass brake is carried by a fixed support structure, outside the roller, and in that the rotor of the brake is connected to the roller through the interposition of step-up wheels and a one-way clutch device adapted to break the connection between the brake rotor and the roller when the blind is lowered, the step-up wheels and the one-way clutch device being carried by the fixed support structure, outside the roller.
- The one-way clutch device has an output shaft for coupling to the roller of the blind, which is easily adaptable to any type of roller. Furthermore, since the centrifugal-mass brake is located outside the roller, maintenance operations on the brake can be carried out easily and rapidly, and it is also possible to provide a device for adjustment of the brake which is easily accessible from outside. Since the brake is not associated with the roller of the blind, there are no problems resulting from vibrations of the roller during rolling up of the blind.
- The end support of the roller containing the centrifugal-mass brake is very adaptable to any type of roller.
- Further characteristics and advantages of the invention will become clear from the description which follows with reference to the appended drawings, provided purely by way of non-limiting example, in which:
- Figure 1 is a perspective view of a roller blind according to the invention,
- Figure 2 is a section taken on the line II-II of Figure 1, and
- Figure 3 is a section taken on the line III-III of Figure 2.
- Figure 1 shows a roller blind 1 comprising a
horizontal roller 2 for supporting the blind, mounted for rotation about its own axis by means of two brackets 3 screwed to the wall. The sheet of the blind is indicated 4 and has an upper edge (not visible in the drawings) which is fixed to theroller 2 and a free lower edge provided with a stiffening rod 5. - One end of the roller 2 (the right-hand end in Figures 1, 3) carries a cylindrical body 5 which is supported for rotation on a shaft 6. Between the body 5 and the shaft 6 is interposed a helical spring 7 tending to bias the roller towards the position in which the blind is rolled up. The shaft 6 ends a certain distance from the end of the
tube 2 carrying the cylindrical body 5. One end of the shaft 6, which projects axially from the roller, is indicated 8 and is intended to be fixed in a corresponding seat of the respective support bracket 3. The usual ratchet gear which enables the blind to be locked in any position against the action of the spring 7 is housed within the body 5. This mechanism is not illustrated in detail in the present description, since it is of known type and does not fall within the scope of the present invention. - The opposite end of the
tube 2 is provided with a closure element 9 having anaxial cavity 10 of non-circular section, for example, of hexagonal section. A correspondingly-sectioned output shaft 11 of a one-way clutch device 12 situated within a fixedhollow support structure 13 is engaged in thecavity 10. - Within the
structure 13 is situated a centrifugal-mass brake 14 including a fixed ring 15 (see also Figure 3) and arotor 16 carried by ashaft 17 which is mounted rotatably within thestructure 16. Twocentrifugal masses 19 are articulated at 18 to the rotor 16 (Figure 3) and press against the internal surface of thering 15, due to the centrifugal effect, when therotor 16 is rotated. Apin spring 20 is associated with eachcentrifugal mass 19 and tends to keep the centrifugal mass in a position in which it is disengaged from thering 15 so that, when the rotor is stopped, thecentrifugal masses 19 are not in contact with the internal surface of the ring. The loading of thesprings 20 can be adjusted by acting oneccentric pins 21. For example, thepins 21 may be carried by screws whose heads are accessible from outside, so as to enable the operator to adjust the brake easily. Theshaft 17 carries agear 22 which meshes with a further gear 23 of larger diameter carried by ashaft 24 mounted rotatably within thestructure 13 and coaxial with the output shaft 11. The twoshafts 24, 11 are connected to each other by means of theclutch device 12 which comprises twowheels 25 having frontal teeth meshed together, one of which is joined to theshaft 24, while the other is coupled for rotation with the shaft 11 but is axially slidable on asplined portion 26 thereof. Ahelical spring 27 tends to keep the two wheels meshed together. - When the blind is unrolled, the pair of
gears 22, 23 constitute step-up wheels which tend to rotate therotor 16 of thebrake 14 at a fairly high rate. Consequently, at this stage, thecentrifugal masses 19 would tend to exert a braking action which would inconveniently impede the action of the operator. Theclutch device 12 operates at this stage, however, to enable the output shaft 11 and consequently theroller 2 of the blind to rotate in steps, while theshafts - When the operator rewinds the blind under the action of the spring 7, however, the
clutch device 12 remains in the position in which theshafts 24, 11 are connected, so that the rotor of the brake rotates at a fast rate and exerts the required braking action. - From the preceding description, it is clear that the roller blind according to the invention has the advantage of enabling easy and rapid execution of maintenance and adjustment operations on the brake associated with the blind. Moreover, the output end of the shaft 11 may easily be adapted to any type of roller, a closure element, such as that indicated 9 in the appended drawings, being provided at the end thereof.
- The
wheels 22, 23 can easily be replaced to achieve whatever transmission ration is required.
Claims (5)
1. A roller blind of the type comprising a horizontal roller (2) for supporting the blind and mounted for rotation about its own axis, a blind (4) having an upper edge fixed to the roller and a free lower edge, resilient means (7) tending to bias the roller (2) towards a position in which the blind is rolled up, and a centrifugal-mass brake (14) for slowing the rotation of the roller (2) during rolling up of the blind, characterised in that the centrifugal-mass brake (14) is carried by a fixed support structure (13), outside the roller, and in that the rotor (16) of the brake is connected to the roller (2) through the interposition of step-up wheels (22, 23) and a one-way clutch device (12) adapted to break the connection between the rotor (16) of the brake (14) and the roller (2) when the blind is lowered, the one-way clutch device (12) and the step-up wheels (22, 23) also being carried by the fixed support structure, outside the roller (2).
2. A roller blind according to Claim 1, characterised in that the centrifugal-mass brake is adjustable.
3. A roller blind according to Claim 1, characterised in that the step-up wheels are constituted by a pair of gears, and in that the one-way clutch device is constituted by a pair of wheels having frontal teeth which cooperate with each other and are biassed into engagement with each other by resilient means (27).
4. A roller blind according to Claim 1, characterised in that the one-way clutch device has an output shaft (11) for coupling with the roller (2) of the blind, having a non-circular section and being mounted in a correspondingly-sectioned cavity of a closure element (9) provided at one end of the roller (2) of the blind.
5. An end support for the roller of a roller blind, characterised in that it comprises a fixed support structure carrying a centrifugal-mass brake, and in that the rotor of the brake is connected to the roller (2) through the interposition of step-up wheels (22, 23) and a one-way clutch device (12) adapted to break the connection between the rotor (16) of the brake (14) and the roller (2) when the blind is lowered, the one-way clutch device (12) and the step-up wheels (22, 23) also being carried by the fixed support structure, outside the roller (2).
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE8802558U DE8802558U1 (en) | 1988-02-26 | 1988-02-26 | |
EP88830073A EP0330804A1 (en) | 1988-03-01 | 1988-03-01 | Roller blind, having a braking device with centrifugal masses arranged outside the roller and an end support including this braking device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP88830073A EP0330804A1 (en) | 1988-03-01 | 1988-03-01 | Roller blind, having a braking device with centrifugal masses arranged outside the roller and an end support including this braking device |
Publications (1)
Publication Number | Publication Date |
---|---|
EP0330804A1 true EP0330804A1 (en) | 1989-09-06 |
Family
ID=8200624
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP88830073A Withdrawn EP0330804A1 (en) | 1988-02-26 | 1988-03-01 | Roller blind, having a braking device with centrifugal masses arranged outside the roller and an end support including this braking device |
Country Status (1)
Country | Link |
---|---|
EP (1) | EP0330804A1 (en) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0697571A1 (en) * | 1994-08-17 | 1996-02-21 | Johnson Service Company | Actuator with spring-return mechanism |
EP0761925A1 (en) * | 1995-09-07 | 1997-03-12 | Becker Antriebe GmbH | Braking device for a smoke curtain, fire curtain or similar curtain |
DE102009028872A1 (en) * | 2009-08-26 | 2011-03-03 | Robert Bosch Gmbh | Electric motor, particularly starter motor for use in starter of internal combustion engine, has centrifugal brake that is arranged between anchor and housing |
ITPD20100241A1 (en) * | 2010-07-29 | 2012-01-30 | Bat Spa | SAFETY DEVICE, FOR LOCKING THE ROTATION OF A WINDER ROLLER FOR CURTAINS, WITH AUTOMATIC REWINDING |
DE102011050666A1 (en) | 2011-05-27 | 2012-11-29 | Achim Lienert | Winding assembly for winding cord to blind or roller curtain on rotatably mounted hollow shaft, has spring motor arranged in hollow shaft, where unwinding operation is supported by applying rotational force on hollow shaft |
ES2424828R1 (en) * | 2012-04-03 | 2013-11-06 | Vilarchao Antonio Carballo | BRAKE FOR AN AUTOMATIC SPINNING DEVICE THROUGH TORSION SPRING, AUTOMATIC TURNING SPRING DEVICE DEVICE THAT INCORPORATES SUCH BRAKE AND ROLLING ELEMENT THAT INCLUDES SUCH BRAKE |
WO2022230763A1 (en) * | 2021-04-26 | 2022-11-03 | 株式会社Tok | Rotation speed control device for shaft member |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1339380A (en) * | 1918-06-29 | 1920-05-04 | Kinnear Mfg Co | Brake for fire-shutters |
GB156500A (en) * | 1919-12-13 | 1921-06-30 | Alfred Coindet | Improvements in and relating to blinds |
US1772700A (en) * | 1929-03-28 | 1930-08-12 | Albert R Bellerose | Curtain-roller-operating mechanism |
FR2219300A1 (en) * | 1973-02-24 | 1974-09-20 | Neukirchen Getriebefabrik W U | |
EP0058883A1 (en) * | 1981-02-10 | 1982-09-01 | Kabushiki Kaisha Nichibei | Roll-blind |
EP0093289A2 (en) * | 1982-04-30 | 1983-11-09 | Toso Kabushiki Kaisha | Decelerator for use in roller blinds |
-
1988
- 1988-03-01 EP EP88830073A patent/EP0330804A1/en not_active Withdrawn
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1339380A (en) * | 1918-06-29 | 1920-05-04 | Kinnear Mfg Co | Brake for fire-shutters |
GB156500A (en) * | 1919-12-13 | 1921-06-30 | Alfred Coindet | Improvements in and relating to blinds |
US1772700A (en) * | 1929-03-28 | 1930-08-12 | Albert R Bellerose | Curtain-roller-operating mechanism |
FR2219300A1 (en) * | 1973-02-24 | 1974-09-20 | Neukirchen Getriebefabrik W U | |
EP0058883A1 (en) * | 1981-02-10 | 1982-09-01 | Kabushiki Kaisha Nichibei | Roll-blind |
EP0093289A2 (en) * | 1982-04-30 | 1983-11-09 | Toso Kabushiki Kaisha | Decelerator for use in roller blinds |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0697571A1 (en) * | 1994-08-17 | 1996-02-21 | Johnson Service Company | Actuator with spring-return mechanism |
AU676641B2 (en) * | 1994-08-17 | 1997-03-13 | Johnson Service Company | An actuating drive having a spring return feature |
US5662542A (en) * | 1994-08-17 | 1997-09-02 | Johnson Service Company | Actuating drive having a spring return feature |
EP0761925A1 (en) * | 1995-09-07 | 1997-03-12 | Becker Antriebe GmbH | Braking device for a smoke curtain, fire curtain or similar curtain |
DE102009028872A1 (en) * | 2009-08-26 | 2011-03-03 | Robert Bosch Gmbh | Electric motor, particularly starter motor for use in starter of internal combustion engine, has centrifugal brake that is arranged between anchor and housing |
ITPD20100241A1 (en) * | 2010-07-29 | 2012-01-30 | Bat Spa | SAFETY DEVICE, FOR LOCKING THE ROTATION OF A WINDER ROLLER FOR CURTAINS, WITH AUTOMATIC REWINDING |
DE102011050666A1 (en) | 2011-05-27 | 2012-11-29 | Achim Lienert | Winding assembly for winding cord to blind or roller curtain on rotatably mounted hollow shaft, has spring motor arranged in hollow shaft, where unwinding operation is supported by applying rotational force on hollow shaft |
DE102011050666B4 (en) * | 2011-05-27 | 2014-06-12 | Achim Lienert | rewinder |
ES2424828R1 (en) * | 2012-04-03 | 2013-11-06 | Vilarchao Antonio Carballo | BRAKE FOR AN AUTOMATIC SPINNING DEVICE THROUGH TORSION SPRING, AUTOMATIC TURNING SPRING DEVICE DEVICE THAT INCORPORATES SUCH BRAKE AND ROLLING ELEMENT THAT INCLUDES SUCH BRAKE |
WO2022230763A1 (en) * | 2021-04-26 | 2022-11-03 | 株式会社Tok | Rotation speed control device for shaft member |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US4838333A (en) | Roller blind with a centrifugal-mass brake located outside the roller and an end support containing the brake | |
US4513805A (en) | Decelerator for use in roller blinds | |
US4214621A (en) | Awning mechanism | |
EP0330804A1 (en) | Roller blind, having a braking device with centrifugal masses arranged outside the roller and an end support including this braking device | |
US3423785A (en) | Position control mechanism | |
BRPI1015804B1 (en) | WINDOW CURTAIN AND AUXILIARY SPRING MODULE FOR A WINDOW COVER | |
KR20190057857A (en) | Dual screen roll blind | |
JP2542234B2 (en) | Reduction mechanism for controlling the closing device | |
EP0940553B1 (en) | Device for actuating a roller blind | |
CA1295929C (en) | Roller blind with a centrifugal-mass brake located outside the roller and an end support containing the brake | |
EP3754150B1 (en) | Cordless zebra curtain with an adjustable mainspring | |
CA2256569C (en) | Elastic means for rolling up a roller curtain | |
JPS61189967A (en) | Paper feed mechanism | |
US5217417A (en) | Device for controlling the sweeping-angle of a fan | |
EP0058883B1 (en) | Roll-blind | |
CN220617967U (en) | Anti-offset copper wire winding equipment | |
US1950419A (en) | Anti-back-lash device | |
JP3073016U (en) | Transmission structure of electric shading screen of car | |
CN219929130U (en) | Unreeling device for aluminum foil paper roll | |
CN220311372U (en) | Leveling mechanism of straightening machine | |
EP0384052B1 (en) | A device for controlling the sweeping-angle of a fan | |
US2226277A (en) | Cloth beam clutch | |
JPH0616134Y2 (en) | Roll blind elevating device | |
CN212475540U (en) | Cloth discharging device of setting machine | |
EP3992414B1 (en) | Coupling for coupled retractable screens, screen device with such a coupling and use of a such coupling |
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 |
Kind code of ref document: A1 Designated state(s): AT BE CH DE ES FR GB GR IT LI LU NL SE |
|
17P | Request for examination filed |
Effective date: 19890810 |
|
17Q | First examination report despatched |
Effective date: 19901116 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION HAS BEEN WITHDRAWN |
|
18W | Application withdrawn |
Withdrawal date: 19910220 |