CN1037377C - Method for mounting a crystal on a watch case timepiece comprising positioning means for a crystal on a case crystal and case intended for fitting out such a timepiece - Google Patents
Method for mounting a crystal on a watch case timepiece comprising positioning means for a crystal on a case crystal and case intended for fitting out such a timepiece Download PDFInfo
- Publication number
- CN1037377C CN1037377C CN92115374A CN92115374A CN1037377C CN 1037377 C CN1037377 C CN 1037377C CN 92115374 A CN92115374 A CN 92115374A CN 92115374 A CN92115374 A CN 92115374A CN 1037377 C CN1037377 C CN 1037377C
- Authority
- CN
- China
- Prior art keywords
- watch glass
- notch
- shell block
- glass
- coign
- 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.)
- Expired - Fee Related
Links
- 238000000034 method Methods 0.000 title claims abstract description 17
- 239000013078 crystal Substances 0.000 title 3
- 239000011521 glass Substances 0.000 claims abstract description 76
- 239000000463 material Substances 0.000 claims description 8
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims description 6
- 240000006909 Tilia x europaea Species 0.000 claims description 6
- 235000011941 Tilia x europaea Nutrition 0.000 claims description 6
- 239000004571 lime Substances 0.000 claims description 6
- 239000012815 thermoplastic material Substances 0.000 abstract 1
- 238000003466 welding Methods 0.000 description 4
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 238000005476 soldering Methods 0.000 description 2
- ACYXOHNDKRVKLH-UHFFFAOYSA-N 5-phenylpenta-2,4-dienenitrile prop-2-enoic acid Chemical compound OC(=O)C=C.N#CC=CC=CC1=CC=CC=C1 ACYXOHNDKRVKLH-UHFFFAOYSA-N 0.000 description 1
- 239000004925 Acrylic resin Substances 0.000 description 1
- 229920000178 Acrylic resin Polymers 0.000 description 1
- NLHHRLWOUZZQLW-UHFFFAOYSA-N Acrylonitrile Chemical compound C=CC#N NLHHRLWOUZZQLW-UHFFFAOYSA-N 0.000 description 1
- 241001280173 Crassula muscosa Species 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 1
- 229920002285 poly(styrene-co-acrylonitrile) Polymers 0.000 description 1
- 239000004926 polymethyl methacrylate Substances 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
- 229920000638 styrene acrylonitrile Polymers 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G04—HOROLOGY
- G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
- G04B37/00—Cases
-
- G—PHYSICS
- G04—HOROLOGY
- G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
- G04B39/00—Watch crystals; Fastening or sealing of crystals; Clock glasses
- G04B39/02—Sealing crystals or glasses
- G04B39/025—Sealing crystals or glasses without special sealing parts
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Electric Clocks (AREA)
- Joining Of Glass To Other Materials (AREA)
- Packaging Frangible Articles (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
- Oscillators With Electromechanical Resonators (AREA)
- Microscoopes, Condenser (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
Abstract
The invention relates to a method for fitting a glass onto a watch case, a timepiece comprising means for placing in position a glass on a case, as well as a glass and a case intended to equip such a piece. The timepiece according to the invention includes: - a case, - a glass mounted on the case, - means for fixing the glass to the case, and - means for angular positioning of this glass on the said case, this piece being characterised in that the means for angular positioning consist, on the one hand, of a notch made directly on the glass and, on the other hand, of a protuberance which is made directly on the case and which is engaged into the said notch. The invention applies for example to timepieces including a glass and a case made from heat-weldable thermoplastic material.
Description
The present invention relates to a kind of watch glass is loaded on method on the watchcase by predetermined angular position.
It also relates to a kind of table that contains locating device in addition, and this locating device is used for watch glass is contained in housing, and the watch glass and the housing that are used to assemble described table.
Or rather, the present invention relates to watch glass that plastic material is made and install and be positioned on the watchcase that same material makes,, can be welded on the watch glass heat seal in the housing by a kind of technology as ultrasonic soldering.
This class solder technology in European patent EP 0101663 by introduction.
Also have, can pre-determine angle and make watch glass be fixed on the fixed system on the housing and the locating device that is used for above-mentioned welding is known.
Yet a subject matter of said method is complex structure or is observable from the outside.
Therefore, the purpose of this invention is to provide a kind of on watchcase the method for loader table glass, a kind of table that has locating device is provided, this locating device is used for above-mentioned watch glass is fixed on housing, and does not have the shortcoming introduced above.
For this purpose, the present invention have a kind of with fixed table glass under the predetermined relative positioning angle in a method that comprises on the watchcase of at least one shell block, the step that comprises is as follows:
(a) locating slot directly is set on the limes marginis of watch glass, is used to be fastened to shell block;
(b) on shell block, directly be provided with one with the corresponding coign of described groove, its shape can make it mesh in groove,
(c) watch glass is put on the shell block, described notch and described coign are aligned, they are bonded with each other and watch glass is fixed on the housing.
For this purpose, the invention provides a kind of table, it comprises:
---a watchcase has at least one shell block;
---piece is fixed on the watch glass on the housing,
---be used for watch glass is fixed on device on the shell block of housing,
---be used for this watch glass is fixed on angle locating device on the shell block.
This table is characterised in that: above-mentioned angle locating device is configured to, and on the one hand, a notch is set directly on the limes marginis of watch glass, on the other hand, a coign is set directly on shell block, and meshes in described notch.
For this purpose, watch glass is characterised in that and comprises a locating notch of being made by the V-type groove on the one hand, this groove radially extends and is set on the edge of watch glass, on the other hand, housing comprises a shell block and a bonnet, it is characterised in that and also comprises a location coign that is arranged on the shell block that the local at least shape of this coign is that a drift angle is about 80 ° isosceles triangle.
Other features and advantages of the present invention will be by following more detailed description, and provides with reference to accompanying drawing and illustrational mode.
Fig. 1 is the partial sectional view of table assembly, and this table assembly comprises by the installation of installation method of the present invention and locating device and is positioned at watch glass on the housing.
Fig. 2 is the partial sectional view of the part watch glass that arrow II shows in Fig. 1 according to the present invention.
Fig. 3 be according to the present invention in Fig. 2 the side view of the watch glass shown in the arrow III.
Fig. 4 is the partial top view of watchcase of the present invention.
Fig. 5 is along the partial sectional view shown in the arrow V-V among Fig. 4.
Fig. 6 is similar to Fig. 5, but the watch glass that shows in Fig. 2 and 3 is positioned on the housing of Figure 4 and 5, and prepares heat seal and be welded on this housing.
As shown in Figure 1, in this embodiment, table according to the present invention comprises the watchcase 1 that has integrally formed shell block 2 and tongue and groove 4, thereby constitutes a simple assembly.
Described table comprises that also one is installed in the watch glass 6 on the housing 1.In the present embodiment, watch glass 6 and housing 1 are to make with heat sealable thermoplastic.For example, watch glass is to be formed by the transparent acrylic resin that is commonly called as organic glass on the market (PMMA).For housing, it can be masked as ABS by abbreviation, and one of material of ASA or SAN is made.Above-mentioned material is respectively acrylic acid---butadiene---styrol copolymer, acrylic acid styrene-acrylonitrile copolymer resin copolymer and the rare vinyl cyanide of benzene second.Between watch glass 6 and housing 1, insert an index dial 8.
At the index dial of housing 1 M of table mechanism of standard is housed for 8 times, resembles characteristic ground with empty line here and represent.
With further reference to Fig. 2 and Fig. 3, it has represented one according to the watch glass 6 that supplies meter apparatus to use of the present invention in more detailed mode.
Watch glass 6 has an outside enlarging, and be used to housing 1 on the periphery limes marginis 10 (Fig. 1 and Fig. 4) that matches of circular trough 12.In aforesaid European patent, described limes marginis 10 with more detailed mode and be inserted on the housing 1 and welded by heat seal, particularly carry out heat and merge by ultrasonic technology.
It should be noted that watch glass 6 contains the notch 14 of a location, form the V-type groove that radially extends along watch glass 6 at least on notch top, and notch 14 forms on edge 10.
The notch 14 that is illustrated forms the drift angle A (Fig. 3) of an isosceles triangle at least on its top, the selective value of drift angle A is between 85 ° to 95 °, and best value is 90 °.Therefore, notch 14 is arranged in the edge 10 outermost radial positions, and its opening is in the horizontal with respect to opening inside and outside the watch glass.
With further reference to Fig. 4 and Fig. 5, it shows one according to the housing 1 for table assembling usefulness of the present invention in more detailed mode.
Housing 1 comprises shell block 2, and it extends from wedge angle 18 can tighten fixedly watch chain, not shown, and shell block also comprises a bonnet 20.
As previously mentioned, housing 1 is provided with a passage or a ring groove 12 that is used for forming with the edge 10 of watch glass 6 weld zone.
According to the present invention, housing 1 comprises a location coign 22 disposed thereon, exactly is on shell block 2.
The coign 22 that forms on groove or passage 12 its local shape at least is an isosceles triangle, and its drift angle B (Fig. 5) is approximately 80 °.
Fig. 6 is illustrated in before the mutual welding of two elements, and watch glass 6 is positioned on the housing 1.Therefore, merit attention to such an extent that be, the coign 22 of Zhan Shiing in the drawings, the head portion at it is cut into wedge angle at least, is extended to watch glass 6 by housing 1 in common mode.
Or rather, notch 14 is that end face is represented with E in the face of housing 1 launches.
Therefore, be appreciated that in the method that watch glass is installed on the housing it is to realize in passages or the groove 12 by on housing 1, watch glass 6 being located, then edge 10 being inserted.Watch glass is rotated clockwise or counterclockwise, enter engagement, and notch/4 can the oneself be adjusted on coign 22 up to notch 14 and coign 22.
Ultrasonic soldering is operated and realized by a high frequency sound mechanical vibrator (sonotrode), and is not shown, in the European patent specification 0101663 of Jie Shaoing detailed explanation arranged in front.
Fig. 1 has represented to be formed by notch 14 and coign 22 the assembling table of the regional F of a coincidence.So the notch 14 and the coign 22 of this shape can be welded as a whole.
From the whole peripheral hot weld at edge 10 in shell block 2 passage or groove 12 in after, overlap the district and on table, stretch with circular pattern, by welding two kinds of materials, watch glass 6 be fixed on the housing 1 and obtain so-called coincidence.
The notch 4 and the coign 22 that form locating device on this table can integrally form with aforesaid stationary installation.
Fixing means according to the present invention is as described below:
At first, locating notch 14 is set directly on watch glass 6 on the one hand, for example obtains notch 14 by molded above-mentioned watch glass.Or rather, be arranged on the shape such as the notch 14 of the groove on watch glass 6 edges 10, form V-arrangement at least at an upper portion thereof, and extend diametrically with respect to watch glass, its opening is towards the latter's free end face.
On the other hand, the coign 22 that has illustrated directly is set on housing 1, the shape of coign 22 is corresponding with notch 14, i.e. isosceles triangle, and its shape can mesh with the latter.
In these steps, the angle that notch 14 and coign 22 provide respectively is 90 ° A and 80 ° B.
Next step is placed on watch glass 6 on the appropriate location of housing 1, makes notch 14 relative with coign 22 so that they can be meshed, thereby can be on housing 1 fixed table glass 6.
At last, adopt the notch 14 and the coign 22 of the method fusion component of heat seal welding, simultaneously with outward flange 10 heat seals of watch glass 6 to housing 1.
Said method and the device of having described of the present invention are to determine after the test of many times that watch glass is installed to best located angle on the housing, therefore, can't see any element from the outside of the table made, for example see over from the top of watch glass.Because the formation of notch 14 and coign 22 does not need to add in addition manufacturing process, they are these two structures that element itself has during molded, for example during the process of injection moulding watch glass and housing respectively, and therefore, the present invention is simple and cheaply.
In addition, the watch glass that has notch 14 is suitable for being positioned on the housing that is provided with coign, and coign allows adaptability and fabulous bendability preferably on the position of making assembly.
Claims (15)
- One kind with fixed table glass under the predetermined relative positioning angle in a method that comprises on the watchcase of at least one shell block (2), the step that comprises is as follows:(a) on the limes marginis (10) of watch glass (16), a locating slot (14) is set directly, is used to be fastened to shell block (2);(b) on shell block (2), directly be provided with one with the corresponding coign of described groove (14) (22), its shape can make it mesh in groove,(c) watch glass (6) is put on the shell block (2), described notch (14) and described coign (22) are aligned, they are bonded with each other and watch glass (6) is fixed on the housing (1).
- 2. by the described method of claim 1, it is characterized in that: V-shaped at least at an upper portion thereof and radially extend with respect to watch glass (6) in the shape of notch (14) described in the step (a), its opening is towards free end face (E).
- 3. by the described method of claim 2, it is characterized in that the shape of described groove (14) such as same drift angle (A) are about 90 ° isosceles triangle.
- 4. by the described method of claim 3, it is characterized in that forming the about 80 ° isosceles triangle of a drift angle (B) at least at an upper portion thereof in the shape of the coign (22) described in the step (b).
- 5. by any one described method of aforesaid right requirement, it is characterized in that: watch glass (6) and shell block (2) but be the material of thermal weld, and watch glass (6) is welded to by heat seal on the shell block (2) by its edge in step (c), its edge overlaps with the material of described housing, simultaneously, described notch (14) and coign (22) are welded by heat seal, and the free margins of watch glass is soldered on the shell block (2).
- 6. a table comprisesA watchcase (1); Have at least one shell block (2),A watch glass (6) that is installed on the watchcase (1);The device of a fixed table glass (6) on the shell block (2) of watchcase (1); WithDescribed watch glass (6) is installed to angle locating device on the described shell block (2);It is characterized in that: described angle locating device comprises the notch (14) that the limes marginis (10) of watch glass upward directly is provided with on the one hand, also comprise the coign (22) that is set directly on the shell block (2) on the other hand, and this coign engages with described notch (14).
- 7. by the described table of claim 6, it is characterized in that described notch (14) is arranged in the outermost radial position of watch glass.
- 8. by claim 6 or 7 described tables, it is characterized in that: notch (14) with respect to watch glass (6) from side direction towards the outside and inside open.
- 9. by claim 7 or 8 described tables, it is characterized in that: described notch (14) is made into V-shaped groove at least at an upper portion thereof, and along the radially extension of watch glass (6), its opening surface is to housing.
- 10. by the described table of claim 9, it is characterized in that: described notch (14) is the isoceles triangle shape.
- 11., it is characterized in that drift angle (A) angle of described notch is selected between 85 ° to 95 ° by the described table of claim 10.
- 12., it is characterized in that drift angle (A) angle of described notch (14) is 90 ° by the described table of claim 11.
- 13. by claim 11 or 12 described tables, it is characterized in that: it is 80 ° isosceles triangle shape that described coign (22) presents drift angle (B) at least at an upper portion thereof.
- 14., it is characterized in that described locating device (14,22) has formed the holistic part of the device of fixed table glass on the shell block (2) of housing by one of claim 6 to 13 described table.
- 15. by the described table of claim 14, it is characterized in that described shell block (2) and described watch glass (6) but make by the material of thermal weld, described notch (14) and described coign (22) are welded to one another together.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH3860/91A CH683482B5 (en) | 1991-12-28 | 1991-12-28 | A method for assembling a mirror on a watch case, comprising timepiece means for positioning of a lens on a box, and lens intended to equip such a part. |
| CH3860/91 | 1991-12-28 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1078050A CN1078050A (en) | 1993-11-03 |
| CN1037377C true CN1037377C (en) | 1998-02-11 |
Family
ID=4265030
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN92115374A Expired - Fee Related CN1037377C (en) | 1991-12-28 | 1992-12-24 | Method for mounting a crystal on a watch case timepiece comprising positioning means for a crystal on a case crystal and case intended for fitting out such a timepiece |
Country Status (12)
| Country | Link |
|---|---|
| EP (1) | EP0549978B1 (en) |
| JP (1) | JPH05264750A (en) |
| KR (1) | KR930013896A (en) |
| CN (1) | CN1037377C (en) |
| AT (1) | ATE166731T1 (en) |
| AU (1) | AU665966B2 (en) |
| BR (1) | BR9205175A (en) |
| CA (1) | CA2084953A1 (en) |
| CH (1) | CH683482B5 (en) |
| DE (1) | DE69225687D1 (en) |
| MX (1) | MX9207262A (en) |
| TW (1) | TW223684B (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1046967B1 (en) * | 1999-04-22 | 2007-03-28 | ETA SA Manufacture Horlogère Suisse | Method for mounting a casing-ring in a watch case and case-ring used in said method |
| DE69939974D1 (en) * | 1999-04-22 | 2009-01-08 | Eta Sa Mft Horlogere Suisse | Mutual fastening of a glass, a dial and a work ring for a clock |
| JP5493527B2 (en) | 2009-07-14 | 2014-05-14 | セイコーエプソン株式会社 | Clock with wireless function |
| EP2579106A1 (en) | 2011-10-04 | 2013-04-10 | ETA SA Manufacture Horlogère Suisse | Shaping of an integral transparent clock component |
| EP2584413B1 (en) * | 2011-10-21 | 2014-08-13 | ETA SA Manufacture Horlogère Suisse | Method for attaching a glass to a middle of a watch case |
| JP5741734B2 (en) * | 2014-03-06 | 2015-07-01 | セイコーエプソン株式会社 | Clock with wireless function |
| JP3213040U (en) | 2014-08-27 | 2017-10-19 | アップル インコーポレイテッド | Sapphire cover for electronic devices |
| EP3293587B1 (en) * | 2016-09-09 | 2020-02-19 | Montres Tudor S.A. | Watch glass |
| CN106298685B (en) * | 2016-09-29 | 2019-01-04 | 中国船舶重工集团公司第七一九研究所 | A kind of electronic chip packaging structure using ultrasonic bonding |
| KR101893166B1 (en) * | 2017-04-28 | 2018-08-29 | 엘지전자 주식회사 | The mobile terminal module and the watch type mobile terminal |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2871654A (en) * | 1954-04-14 | 1959-02-03 | Bulova Watch Co Inc | Waterproof watch-case |
| US4229936A (en) * | 1977-04-19 | 1980-10-28 | Fairchild Camera And Instrument Corporation | Low-cost watch case and band |
| US4505596A (en) * | 1983-02-11 | 1985-03-19 | Raul Barbieri | Composable wall-clock |
| CN1036084A (en) * | 1988-03-23 | 1989-10-04 | Eta草图制造公司 | The watchcase of one band table lid |
| CN1044996A (en) * | 1989-02-17 | 1990-08-29 | 西铁城钟表株式会社 | The fixing means of plastics clock and watch side and plastic windshield |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2222911A (en) * | 1938-10-10 | 1940-11-26 | Morf Ernest | Watch crystal |
| CH310554A (en) * | 1953-04-21 | 1955-10-31 | Froidevaux Andre | Housing for a measuring instrument, in particular a watch. |
| CH356414A (en) * | 1959-08-08 | 1961-08-15 | Schlunegger Paul | Faceted glass |
| DE7000980U (en) * | 1970-01-13 | 1970-04-23 | Blessing Werke Kg | CLOCK |
| DE7004514U (en) * | 1970-02-10 | 1970-06-18 | Richard Hoerl Uhren Juwelen Ku | GLASS LID FOR WALL AND TABLE CLOCKS. |
| CH650894GA3 (en) * | 1982-08-12 | 1985-08-30 | Ebauchesfabrik Eta Ag |
-
1991
- 1991-12-28 CH CH3860/91A patent/CH683482B5/en not_active IP Right Cessation
-
1992
- 1992-11-25 TW TW081109459A patent/TW223684B/zh active
- 1992-12-09 CA CA002084953A patent/CA2084953A1/en not_active Abandoned
- 1992-12-15 MX MX9207262A patent/MX9207262A/en not_active IP Right Cessation
- 1992-12-15 KR KR1019920024260A patent/KR930013896A/en not_active Application Discontinuation
- 1992-12-18 AT AT92121593T patent/ATE166731T1/en not_active IP Right Cessation
- 1992-12-18 JP JP4354988A patent/JPH05264750A/en active Pending
- 1992-12-18 DE DE69225687T patent/DE69225687D1/en not_active Expired - Lifetime
- 1992-12-18 EP EP92121593A patent/EP0549978B1/en not_active Expired - Lifetime
- 1992-12-24 AU AU30492/92A patent/AU665966B2/en not_active Ceased
- 1992-12-24 CN CN92115374A patent/CN1037377C/en not_active Expired - Fee Related
- 1992-12-28 BR BR9205175A patent/BR9205175A/en not_active IP Right Cessation
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2871654A (en) * | 1954-04-14 | 1959-02-03 | Bulova Watch Co Inc | Waterproof watch-case |
| US4229936A (en) * | 1977-04-19 | 1980-10-28 | Fairchild Camera And Instrument Corporation | Low-cost watch case and band |
| US4505596A (en) * | 1983-02-11 | 1985-03-19 | Raul Barbieri | Composable wall-clock |
| CN1036084A (en) * | 1988-03-23 | 1989-10-04 | Eta草图制造公司 | The watchcase of one band table lid |
| CN1044996A (en) * | 1989-02-17 | 1990-08-29 | 西铁城钟表株式会社 | The fixing means of plastics clock and watch side and plastic windshield |
Also Published As
| Publication number | Publication date |
|---|---|
| MX9207262A (en) | 1993-06-01 |
| BR9205175A (en) | 1993-06-29 |
| AU3049292A (en) | 1993-07-01 |
| CH683482B5 (en) | 1994-09-30 |
| KR930013896A (en) | 1993-07-22 |
| JPH05264750A (en) | 1993-10-12 |
| DE69225687D1 (en) | 1998-07-02 |
| EP0549978B1 (en) | 1998-05-27 |
| CH683482GA3 (en) | 1994-03-31 |
| AU665966B2 (en) | 1996-01-25 |
| TW223684B (en) | 1994-05-11 |
| EP0549978A1 (en) | 1993-07-07 |
| CN1078050A (en) | 1993-11-03 |
| CA2084953A1 (en) | 1993-06-29 |
| ATE166731T1 (en) | 1998-06-15 |
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