CA2194287C - Method for producing a cap band for discharge lamps - Google Patents
Method for producing a cap band for discharge lamps Download PDFInfo
- Publication number
- CA2194287C CA2194287C CA002194287A CA2194287A CA2194287C CA 2194287 C CA2194287 C CA 2194287C CA 002194287 A CA002194287 A CA 002194287A CA 2194287 A CA2194287 A CA 2194287A CA 2194287 C CA2194287 C CA 2194287C
- Authority
- CA
- Canada
- Prior art keywords
- band
- cap
- discharge lamp
- coated
- cap band
- 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
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
- H01J9/38—Exhausting, degassing, filling, or cleaning vessels
- H01J9/395—Filling vessels
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J61/00—Gas-discharge or vapour-discharge lamps
- H01J61/02—Details
- H01J61/24—Means for obtaining or maintaining the desired pressure within the vessel
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Discharge Lamp (AREA)
Abstract
The invention concerns a process for manufacturing a cap strip (4) for discharge lamps, whereby a carrier strip (1) is coated with at least one substance destined for introduction into the discharge lamp, in particular a mercury alloy (2) and/or getter substance (3). According to the invention, a section (5) is detached from the carrier strip (1) at right angles to the strip's length. The section forms the discharge lamp cap strip (4) and is coated over its entire width (bt) with the substance(s) in question.
Description
~
~ ~~~~ ~~r-' METHOD FQR PRfSD'UCING A CAP BAND FQE DISCFi.a,RGE LAMPS
The invention relates to a r-ethod for producing a cap band for discharge lamps as generically defined by the preamble to claim 1 and to a cap band as qene,rically defined by the preamble to claim 8.
From Published, CTnexamined Japanese Patent Application 6-96728, a low-pressure nercury vapor discharge lamp is known. This discharge lamp has aretal ring cap, which comprises two metal ring portions, in which one portion has a mercury-dispensing functican while the other metal portion has no such function. The first of these metal. portions comprises a nickel-coated iron substrate and a mercury alloy, which comprises a mercury-titanium alloy powder applied to the substrate.
The mercury alloy is located on one side, the inside of the ring portion, while getter is located on the other side, the outside of the ring portion. The amount of mercury to be introduced into the discharge lamp is determined by varying the length of the first portion. That is, if the amount of mercury is to be increased, the length of the first metal portion mentioned above is increased.
The ring cap of the previously known discharge lamp is accordingly not embodied in one piece but rather comprises a plurality of components. This increases both the costs of production of the ring cap and the costs of production of the discharge lamp.
With this prior art as the point of departure, the object of the invention is to disclose a method of the type referred to at the outset and a cap band that makes more-economical production possible.
According to the invention, this object is attained by a ~ ;3123S I~OiS'rJ~Nl3~ t1J :Nr Lw~2'~:ZZ9 69 5t7f ~-idd .~Jtf~SO : tJO~ ~ OC
~S ~ ~ ~ ~~~J-6Z
method for producing a cap band for discharge lamps, a carrier band (1) being coated with at least one material, in particular a mercury alloy (2) or getter material (3), to be introduced into a discharge lamp, characterized in that there is separated from the carrier band (1) at right angles to its longitudinal direction (LB) a segment (5) which forms a cap band (4) or a part of a cap band for a discharge lamp and is coated over its entire width (BT) with the at least one material, the transverse direction for the carrier band becoming the longitudinal direction for the segment used as cap band or part of the cap band.
The invention has the advantage that from a predetermined length of cap band produced by the method of the invention, many portions can be made, and each portion can be processed in a simple way, in particular to make a one-piece ring cap.
For instance, the width of the substrate band used in the method of the invention is approximately 12 to 55 mm.
If one assumes that for a ring cap a 5-millimeter-wide cap band should be provided, then from one running meter of substrate band, 200 cap bands can be made by the method of the invention; that is, 199 cuts are required. In the prior art, in which a substrate band has a width of 5 to 7 mm, only 23 cap bands can be made for one full ring cap circumference of 42 mm.
The application of getter and mercury alloy is multiple times more expensive than the material itself. If according to the invention cutting is done crosswise to the application of material, and moreover coating is done on one side, then the production speed for one portion (cap band) is multiple times greater (depending on the width BT, Figs.
~ ~~~~ ~~r-' METHOD FQR PRfSD'UCING A CAP BAND FQE DISCFi.a,RGE LAMPS
The invention relates to a r-ethod for producing a cap band for discharge lamps as generically defined by the preamble to claim 1 and to a cap band as qene,rically defined by the preamble to claim 8.
From Published, CTnexamined Japanese Patent Application 6-96728, a low-pressure nercury vapor discharge lamp is known. This discharge lamp has aretal ring cap, which comprises two metal ring portions, in which one portion has a mercury-dispensing functican while the other metal portion has no such function. The first of these metal. portions comprises a nickel-coated iron substrate and a mercury alloy, which comprises a mercury-titanium alloy powder applied to the substrate.
The mercury alloy is located on one side, the inside of the ring portion, while getter is located on the other side, the outside of the ring portion. The amount of mercury to be introduced into the discharge lamp is determined by varying the length of the first portion. That is, if the amount of mercury is to be increased, the length of the first metal portion mentioned above is increased.
The ring cap of the previously known discharge lamp is accordingly not embodied in one piece but rather comprises a plurality of components. This increases both the costs of production of the ring cap and the costs of production of the discharge lamp.
With this prior art as the point of departure, the object of the invention is to disclose a method of the type referred to at the outset and a cap band that makes more-economical production possible.
According to the invention, this object is attained by a ~ ;3123S I~OiS'rJ~Nl3~ t1J :Nr Lw~2'~:ZZ9 69 5t7f ~-idd .~Jtf~SO : tJO~ ~ OC
~S ~ ~ ~ ~~~J-6Z
method for producing a cap band for discharge lamps, a carrier band (1) being coated with at least one material, in particular a mercury alloy (2) or getter material (3), to be introduced into a discharge lamp, characterized in that there is separated from the carrier band (1) at right angles to its longitudinal direction (LB) a segment (5) which forms a cap band (4) or a part of a cap band for a discharge lamp and is coated over its entire width (BT) with the at least one material, the transverse direction for the carrier band becoming the longitudinal direction for the segment used as cap band or part of the cap band.
The invention has the advantage that from a predetermined length of cap band produced by the method of the invention, many portions can be made, and each portion can be processed in a simple way, in particular to make a one-piece ring cap.
For instance, the width of the substrate band used in the method of the invention is approximately 12 to 55 mm.
If one assumes that for a ring cap a 5-millimeter-wide cap band should be provided, then from one running meter of substrate band, 200 cap bands can be made by the method of the invention; that is, 199 cuts are required. In the prior art, in which a substrate band has a width of 5 to 7 mm, only 23 cap bands can be made for one full ring cap circumference of 42 mm.
The application of getter and mercury alloy is multiple times more expensive than the material itself. If according to the invention cutting is done crosswise to the application of material, and moreover coating is done on one side, then the production speed for one portion (cap band) is multiple times greater (depending on the width BT, Figs.
3, 4), for the same machine speed.
In a further advantageous embodiment of the method of the invention, the cap band is produced by coating the substrate band on one side with the at least one material to be introduced into the discharge lamp, and in particular with two materials namely with a mercury alloy and getter.
This has the advantage, among others, that the coating of the two materials on the substrate band can be done simultaneously.
In accordance with a further aspect of this invention, there is provided a method for producing a discharge lamp, in which a segment (5) is cut from a carrier band (1) which is coated with at least one material, in particular a mercury alloy or a getter material, to be introduced into the discharge lamp, which segment (5) is inserted into the discharge lamp and fastened therein, characterized in that the segment (5) is separated from the carrier band (1) at right angles to its longitudinal direction (LB) and the segment (5) forms a cap band (4) or a part of a cap band for the discharge lamp and is coated over its entire width (BT) with the at least one material, the transverse direction for the carrier band (1) becoming the longitudinal direction for the segment (5) used as the cap band (4) or part of the cap band.
The invention will now be described in conjunction with the drawing.
2a Shown are:
Fig. 1, a ring cap for a discharge lamp of the prior art;
Fig. 2, a cap band of the prior art;
Fig. 3, a first embodiment of a cap band, produced by the method of the invention, coated on both sides;
Fig, 4, a second embodiment of a cap band, produced by the method of the invention, coated on one side; and Figs. 5 and 6, two exemplary embodiments of a ring cap produced from a cap band according to the invention.
The ring cap shown in Fig. 1 for a discharge lamp comprises a two-piece oval ring 30, which comprises a first metal piece 31 and a second metal piere 32. The first metal piece may be formed by a cap band, which is shown in Fig. 2.
In Fig. 3, an exemplary embodiment of a cap band produced by the rriethod of the invention is shown. A substrate band 1 (metal band), which has the length LB, is coated with at least one materiai. to be intrgduced, particularly by heating, into the discharge lamp. Preferably, the substrate band 1, which for i.nstance comprises nickel-coated sheet iron, is coated with a mercury alloy 2 and/or getter material. 3, for instance by rolling.
The widtb BB of the substrate band 1 is selected such that it is egual to the circumference of the respective ri*ig cap of the discharge lamp.
The c;a.p band 4 produced by the method of the invention may be formed by one-sided or two-sided coating of the substrate band.
Examples for these embodiments of the cap band are shown in Figs.
3 and 4. Fig. 3 shows a cap band in which the substrate band 1 is coated on one side with getter material 3 and on the other side with a mercury alloy 2. A portion 5 that forms the cap band 4 for a disCharge lamp is sever_efl from the substrate band 1 transversely b%-G1iGti Nul563'r11L_- UD:'it1 _Z222?29 58 5b+ W-1d.d 0;~dSO:hd7l OC tS v?
730 b?
to its longitudi.nal direction LB (which as a rule is the sdirection in which the m.aterial is applied). The portion 5 or cap band 4 is coated over its entire width BT with at least one material.
The cap band produced by the method of the invention has a length LT in the rar.ge of approximately 12 to 55 mm, for instance.
The respective length. LT, as already noted, is equivalent to the circumference of t:.e respect3_ve ring cap of the discharge lamp (for instance, 48 mrr, for a TS low-pressure mercury vapor discharge lamp with a diameter_ of 8/8 ;nches).
The cap t,and slzcrdm in Fig. 4, produced by the method of the invention, is coated on one s::de> Getter material and the mercury alloy are accordingly located on the same sid.e of the cap band.
The cap band shown in Fig. 4 has a width of 44 r,m.
In Figs. 3 and 4, a portion 5 that is 5 mm in width is shown on the riqht-hand side of the substrate band 4 of each drawing. According to the invention, from the running substrate band, for instance as it is shown in Fig. 3 and 4, portions 5 are cut, eacri, having a width BT of 5 mm (length LT of the portion 5 width BB of the substrate band 1-- circ:uraference of the ring cap =
44 mm). By the determination of the width 87C of the portion, in the present case 5 mm, the quantity of material (mercury alloy and/or getter) to be introduced by heating into the discharge lamp is determined. On the other hand, the quantity of material ts) be applied per unit of length of substrate band is deterinir;e.d with a view to a possible fixed width BT of the cap band.
A cap band produced by the method of the invention as described is use.d to produce a discharge lamp, in such a way that it is introdaced into the discharge lamp and sec:ured therein.
According to the invention, this cap band has a length that is ecrial to the circumference of a ring cap of the discharge larip ~~ h3 F7+ V~-Ltd wHdSO:rao') i!a t-s:77 ??a-Fti (such as 44 ?nm). The width of the portion or of the cap band is 5 mm, for instance, and this width is chosen as a function of the material to be introduced into the discharge lamp. Accordingly, the substrate band is coated in such a way that the quantity of material oh materials intended for the discharge lamp is applied over a substrate band portion that is intended for a discharge lamp and has a predetermined width BT, for instance of 5 to 7 mm.
The portion is optionally curved into the specified shape, introduced into the discharge lamp, and secured there.
A discharge lamp according to the invention thus has a cap band 4 of the kind described above and claimed.
ihe ring cap shown in Fig. 5 comprises solely a cap band 4 according to the invention, which is welded on its ends, while the ring cap shown in Fig. 6 comprises one cap band according to the irventi.on and one fuz-ther band, the cap band 4 and the further band being welded to one another.
In a further advantageous embodiment of the method of the invention, the cap band is produced by coating the substrate band on one side with the at least one material to be introduced into the discharge lamp, and in particular with two materials namely with a mercury alloy and getter.
This has the advantage, among others, that the coating of the two materials on the substrate band can be done simultaneously.
In accordance with a further aspect of this invention, there is provided a method for producing a discharge lamp, in which a segment (5) is cut from a carrier band (1) which is coated with at least one material, in particular a mercury alloy or a getter material, to be introduced into the discharge lamp, which segment (5) is inserted into the discharge lamp and fastened therein, characterized in that the segment (5) is separated from the carrier band (1) at right angles to its longitudinal direction (LB) and the segment (5) forms a cap band (4) or a part of a cap band for the discharge lamp and is coated over its entire width (BT) with the at least one material, the transverse direction for the carrier band (1) becoming the longitudinal direction for the segment (5) used as the cap band (4) or part of the cap band.
The invention will now be described in conjunction with the drawing.
2a Shown are:
Fig. 1, a ring cap for a discharge lamp of the prior art;
Fig. 2, a cap band of the prior art;
Fig. 3, a first embodiment of a cap band, produced by the method of the invention, coated on both sides;
Fig, 4, a second embodiment of a cap band, produced by the method of the invention, coated on one side; and Figs. 5 and 6, two exemplary embodiments of a ring cap produced from a cap band according to the invention.
The ring cap shown in Fig. 1 for a discharge lamp comprises a two-piece oval ring 30, which comprises a first metal piece 31 and a second metal piere 32. The first metal piece may be formed by a cap band, which is shown in Fig. 2.
In Fig. 3, an exemplary embodiment of a cap band produced by the rriethod of the invention is shown. A substrate band 1 (metal band), which has the length LB, is coated with at least one materiai. to be intrgduced, particularly by heating, into the discharge lamp. Preferably, the substrate band 1, which for i.nstance comprises nickel-coated sheet iron, is coated with a mercury alloy 2 and/or getter material. 3, for instance by rolling.
The widtb BB of the substrate band 1 is selected such that it is egual to the circumference of the respective ri*ig cap of the discharge lamp.
The c;a.p band 4 produced by the method of the invention may be formed by one-sided or two-sided coating of the substrate band.
Examples for these embodiments of the cap band are shown in Figs.
3 and 4. Fig. 3 shows a cap band in which the substrate band 1 is coated on one side with getter material 3 and on the other side with a mercury alloy 2. A portion 5 that forms the cap band 4 for a disCharge lamp is sever_efl from the substrate band 1 transversely b%-G1iGti Nul563'r11L_- UD:'it1 _Z222?29 58 5b+ W-1d.d 0;~dSO:hd7l OC tS v?
730 b?
to its longitudi.nal direction LB (which as a rule is the sdirection in which the m.aterial is applied). The portion 5 or cap band 4 is coated over its entire width BT with at least one material.
The cap band produced by the method of the invention has a length LT in the rar.ge of approximately 12 to 55 mm, for instance.
The respective length. LT, as already noted, is equivalent to the circumference of t:.e respect3_ve ring cap of the discharge lamp (for instance, 48 mrr, for a TS low-pressure mercury vapor discharge lamp with a diameter_ of 8/8 ;nches).
The cap t,and slzcrdm in Fig. 4, produced by the method of the invention, is coated on one s::de> Getter material and the mercury alloy are accordingly located on the same sid.e of the cap band.
The cap band shown in Fig. 4 has a width of 44 r,m.
In Figs. 3 and 4, a portion 5 that is 5 mm in width is shown on the riqht-hand side of the substrate band 4 of each drawing. According to the invention, from the running substrate band, for instance as it is shown in Fig. 3 and 4, portions 5 are cut, eacri, having a width BT of 5 mm (length LT of the portion 5 width BB of the substrate band 1-- circ:uraference of the ring cap =
44 mm). By the determination of the width 87C of the portion, in the present case 5 mm, the quantity of material (mercury alloy and/or getter) to be introduced by heating into the discharge lamp is determined. On the other hand, the quantity of material ts) be applied per unit of length of substrate band is deterinir;e.d with a view to a possible fixed width BT of the cap band.
A cap band produced by the method of the invention as described is use.d to produce a discharge lamp, in such a way that it is introdaced into the discharge lamp and sec:ured therein.
According to the invention, this cap band has a length that is ecrial to the circumference of a ring cap of the discharge larip ~~ h3 F7+ V~-Ltd wHdSO:rao') i!a t-s:77 ??a-Fti (such as 44 ?nm). The width of the portion or of the cap band is 5 mm, for instance, and this width is chosen as a function of the material to be introduced into the discharge lamp. Accordingly, the substrate band is coated in such a way that the quantity of material oh materials intended for the discharge lamp is applied over a substrate band portion that is intended for a discharge lamp and has a predetermined width BT, for instance of 5 to 7 mm.
The portion is optionally curved into the specified shape, introduced into the discharge lamp, and secured there.
A discharge lamp according to the invention thus has a cap band 4 of the kind described above and claimed.
ihe ring cap shown in Fig. 5 comprises solely a cap band 4 according to the invention, which is welded on its ends, while the ring cap shown in Fig. 6 comprises one cap band according to the irventi.on and one fuz-ther band, the cap band 4 and the further band being welded to one another.
3'~ ~ ~1I35 ~J01~~3H1~ tJ 'Ntj LZCZELc _ 63 5'+ W- ltd ~dt~Z57 ~~JC ~ UC] f7S
; I 4 Z-70- 6I
; I 4 Z-70- 6I
Claims (8)
1. Method for producing a cap band for discharge lamps, a carrier band (1) being coated with at least one material, in particular a mercury alloy (2) or getter material (3), to be introduced into a discharge lamp, characterized in that there is separated from the carrier band (1) at right angles to its longitudinal direction (LB) a segment (5) which forms a cap band (4) or a part of a cap band for a discharge lamp and is coated over its entire width (BT) with the at least one material, the transverse direction for the carrier band becoming the longitudinal direction for the segment used as cap band or part of the cap band.
2. Method according to Claim 1, characterized in that the carrier band (1) has a width (BB) which is equal to the circumference of an annular cap of the discharge lamp.
3. Method according to Claim 1, characterized in that the cap band is produced by one-sided coating of the carrier band (1) with the at least one material to be introduced into the discharge lamp.
4. Method according to Claim 1, characterized in that the cap band is produced by two-sided coating of the carrier band (1) with at least two materials to be introduced into the discharge lamp, the cap band being coated on one side with the at least one material to be introduced into the discharge lamp and being coated on the other side with the at least one further material to be introduced into the discharge lamp.
5. Method according to any one of claims 1 to 4, characterized in that coating is done with a mercury alloy or with getter.
6. Method according to any one of claims 1 to 5, characterized in that the carrier band (1) has a width (BB) in the range of about 12 to 55 mm.
7. Method according to any one of claims 1 to 6, characterized in that the carrier band (1) is coated in such a way that the cap band (4) intended for a discharge lamp has the quantity of the material or materials intended for this discharge lamp.
8. Method for producing a discharge lamp, in which a segment (5) is cut from a carrier band (1) which is coated with at least one material, in particular a mercury alloy or a getter material, to be introduced into the discharge lamp, which segment (5) is inserted into the discharge lamp and fastened therein, characterized in that the segment (5) is separated from the carrier band (1) at right angles to its longitudinal direction (LB) and the segment (5) forms a cap band (4) or a part of a cap band for the discharge lamp and is coated over its entire width (BT) with the at least one material, the transverse direction for the carrier band (1) becoming the longitudinal direction for the segment (5) used as the cap band (4) or part of the cap band.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19521972A DE19521972A1 (en) | 1995-06-16 | 1995-06-16 | Process for producing a cap tape for discharge lamps |
| DE19521972.4 | 1995-06-16 | ||
| PCT/DE1996/000924 WO1997000532A1 (en) | 1995-06-16 | 1996-05-28 | Process for manufacturing a cap strip for discharge lamps and a cap strip for discharge lamps |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2194287A1 CA2194287A1 (en) | 1997-01-03 |
| CA2194287C true CA2194287C (en) | 2007-07-10 |
Family
ID=38254913
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002194287A Expired - Fee Related CA2194287C (en) | 1995-06-16 | 1996-05-28 | Method for producing a cap band for discharge lamps |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2194287C (en) |
-
1996
- 1996-05-28 CA CA002194287A patent/CA2194287C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CA2194287A1 (en) | 1997-01-03 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKLA | Lapsed |
Effective date: 20150528 |