AP710A - Automated method and apparatus for detachably securing flexible packages to a display strip. - Google Patents
Automated method and apparatus for detachably securing flexible packages to a display strip. Download PDFInfo
- Publication number
- AP710A AP710A APAP/P/1996/000876A AP9600876A AP710A AP 710 A AP710 A AP 710A AP 9600876 A AP9600876 A AP 9600876A AP 710 A AP710 A AP 710A
- Authority
- AP
- ARIPO
- Prior art keywords
- package
- sealing
- strip
- seal
- display
- Prior art date
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
- B65B51/00—Devices for, or methods of, sealing or securing package folds or closures; Devices for gathering or twisting wrappers, or necks of bags
- B65B51/10—Applying or generating heat or pressure or combinations thereof
- B65B51/14—Applying or generating heat or pressure or combinations thereof by reciprocating or oscillating members
- B65B51/146—Closing bags
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
- B65B15/00—Attaching articles to cards, sheets, strings, webs, or other carriers
- B65B15/04—Attaching a series of articles, e.g. small electrical components, to a continuous web
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
- B65B9/00—Enclosing successive articles, or quantities of material, e.g. liquids or semiliquids, in flat, folded, or tubular webs of flexible sheet material; Subdividing filled flexible tubes to form packages
- B65B9/10—Enclosing successive articles, or quantities of material, in preformed tubular webs, or in webs formed into tubes around filling nozzles, e.g. extruded tubular webs
- B65B9/20—Enclosing successive articles, or quantities of material, in preformed tubular webs, or in webs formed into tubes around filling nozzles, e.g. extruded tubular webs the webs being formed into tubes in situ around the filling nozzles
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Auxiliary Devices For And Details Of Packaging Control (AREA)
- Containers And Plastic Fillers For Packaging (AREA)
- Packages (AREA)
- Package Closures (AREA)
- Replacing, Conveying, And Pick-Finding For Filamentary Materials (AREA)
- Container Filling Or Packaging Operations (AREA)
Abstract
A method and apparatus for removably securing flexible packages (70) to a display carrier strip (18) so that the packages can be removed therefrom without damaging the sealed condition of the packages. Tne apparatus includes sealing jaws (52, 53) which form transverse seals on a package preform that is separated into two packages. The scaling jaws have attached to the underside thereof sealing blocks which carry scaling elements that heat-seal the display carrier strip to the top of each filled sealed package simultaneously with the forming of the transverse seals by the sealing jaws. The attachment of the packages to the carrier strip is greatly simplified compared with prior an attachment systems.
Description
AUTOMATED METHOD AND APPARATUS FOR DETACHABLY. SECURING FLEXIBLE PACKAGES TO A DISPLAY STRIP
BACKGROUND OF THE INVENTION Field of the Invention
The present invention relates generally to systems tor affixing packages to a carrier strip and, more particularly, to a method and apparatus for detachably securing flexible packages to a display carrier strip and -simultaneously forming a sealed end of each
1C package.
Description of Background Art
It is known in the art to form flexible packages of various products, e.g., snack food products, and affix the packages to a carrier strip which may be displayed in a grocery store or the like. The customer can remove a package from the carrier without damaging the package, i.e., without adversely affecting the sealed condition of the package. One of the primary attributes of such display strip systems is their suitability for use in a retail establishment with limited space. The display strips are considerably smaller than conventional product display racks, which racks may not fit in particular establishments due to space limitations or may not be justified in view of limited sales volume. The display strip and attached packages require little space and may be positioned on a counter or other suitable support.
AP/P/ 96/00876
AP. 00710
U.S. Patent No. 4,422,552 to Palmer et al. and U.S. patent No. 4,476,619 to Palmer disclose methods and apparatus for folding the end seal or flange of a bag into the slot of a display card. The steps of folding and tucking the end seals of numerous packages into a slotted display card are often performed manually and consume considerable time and expense.
The prior art, however, includes alternative methods of attaching flexible packages to a display card.
1C For example, U.S. Patent No. 2,272,623 to Runner discloses a display card with packages removably attached thereto by adhesive. In U.S. Patent No. 4,003,782 to Farrelly, manufactured bags are applied to two lines of pressure sensitive adhesive and then stored in a carton or the like. It is also known to attach empty packages to a display or mounting support base and then fill and seal the packages. See U.S. Patent No. 3,331,182 to Hannon. Several problems arise with the aforementioned methods of securing packages to a display strip. One problem that often occurs when the packages are adhesively attached to the display strip is that the packages cannot easily be removed from the strip without damaging the sealed condition of the packages. Additional problems arose in attempts to automate the attachment of the carrier strip to the flexible packages due to the limited space available below the sealing jaws of a conventional bagmaking apparatus. In other words, there was little or no room below the seal jaws to accommodate automatic attachment
0 equipment.
It is apparent that there is a need in the art for a method and apparatus for removably securing flexible packages to a display strip which are free of the problems present in prior art systems.
AP/P/ 96/00876 w7lO
SUMMARY OF ΊΉΕ INVENTION The present invention provides a method and apparatus for detachably securing flexible packages to a display carrier strip while simultaneously sealing an end of each package. In its preferred form, the present invention includes a novel sealing jaw assembly which permits the display carrier strip to be fed therethrough into close proximity with the package preform. The sealing jaws place a transverse seal in the package preform which forms the top seal of a filled package extending below the jaws, and the bottom seal of an empty package extending above the jaws. The top seal of the filled package is detachably secured to the 'carrier display strip simultaneously with the forming of the transverse seal. The continuous display strip and attached packages then may be transported by a suitable conveyor device to a packaging area or the like and prepared for shipment.
BRIEF DESCRIPTION OF THE DRAWINGS
Additional features and advantages of the present invention will become apparent from the following detailed description taken in conjunction with the accompanying drawings wherein:
FIG. 1 is a somewhat schematic view of an automated assembly apparatus for detachably securing flexible packages to a display strip;
FIG. 2A is a perspective view of a sealing jaw according to the present invention;
FIG. 2B is an end elevation view of the sealing jaw shown in FIG. 2A looking in the direction of arrows b-b in FIG. 2A;
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FIG. 2C is a seccionai view of the sealing jaw shown in FIG. 2A looking in the direction of arrows οο in FIG. 2A;
FIG. 3A is an enlarged view of the encircled 5 portion in FIG. 1;
FIG. 3B is a front elevational view of the portion shown in FIG. 3 looking in the direction of arrows a in FIG. 3;
FIG. 4A is a front elevational view of the 10 finished display strip and attached packages;
FIG. 4B is a side elevational view of the display strip and attached packages shown in FIG. 3A; and
FIG. 4C is a front elevational view of the display strip and attached packages shown in FIG. 3A with some of the packages removed.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
Referring to FIG. 1, an automated apparatus for detachably securing flexible packages to a display strip is indicated generally by the reference numeral
10. A bagmaking apparatus, e.g., a vertical form, fill, and seal apparatus (VFFS), is shown schematically at 12. Bagmaking apparatus such as VFFS machines are known in the art and will not be described in detail in the present application.
Bagmaking apparatus 12 forms packaging material into package preforms which are advanced in consecutive fashion through the apparatus 12. In particular, a preform is transversely sealed by sealing jaws at a sealing station disposed below the filling tube of the bagmaking apparatus. The seal constitutes the top edge of a filled package extending below the sealing station and the bottom edge of a yet to be filled package extending above the sealing station. A knife mechanism
AP/P/ 96/00876
AP. Ο Ο 7 1 Ο cuts the preform at the transverse seal to separate same into :wo separate packages; one lower package being filled and sealed at both ends and the upper package being empty and sealed at its lower end. After separating the packages by cutting the transverse seal on the preform, the empny package is advanced and filled to bring its top edge to the sealing station where it is sealed and separated from the next package, i.e., the package now extending above the sealing station.
The sealing station is indicated generally at 50 in FIG. 1 and includes sealing jaws 52, 53 for forming the aforementioned transverse seals. A lower sealing assembly for removably attaching the packages to the display strip is indicated generally at 60 in FIG. 1 and includes lower sealing blocks cr bars 62, 63. As best seen in FIGS. 2A-2C, lower sealing blocks or bars 62, 63 preferably are respectively secured to sealing jaws 52, 53. Sealing jaw 52 has a cut-out portion 66 which defines a slot 68 extending through the jaw for reasons that will be described below.
With attention directed to FIG. 1, a supply reel 14 of display carrier strip material has a strip web 18 extending therefrom toward bagmaking apparatus 12. A reel friction brake 16 controls the speed of rotating supply reel 14. The display carrier strip is preferably manufactured from a material that is flexible but yet stiff enough to support a plurality of packages as seen in FIG. 4A which shows the final product. The display strip material is selected so that it does not melt and/or deform before the attachment of the packages to the strip, i.e, as the strip is fed through the sealing jaw which typically reaches 375°F during operation. For example, the
AP/P/ 9 6 / 0 0 8 76
AP . 0 0 7 1 0 display carrier strip may be manufactured from suitable clastic materials, such as paper laminated to coextruded metallized polyethylene to 40 micron polypropylene.
The carrier strip web 18 passes from supply reel to a strip drive mechanism indicated generally at reference numeral 30 and enclosed in circle I in FIG.
1. The strip drive mechanism 30 advances carrier web 18 in a controlled manner relative advancement of the package preforms. The strip drive mechanism 30 can be any device which suitably advances the carrier strip web 18 through the sealing station 50, 60.
The circled portion I of FIG. 1 is enlarged in FIGS. 4A and 4B and shows a preferred embodiment of a strip drive mechanism 30 that includes a stepper motor having a shaft 34 which drives a stepper wheel 36. The stepper wheel 36 rotates to advance strip web 18 into an elongated slot formed in sealing jaw 52 as described in detail below. A back-up roller 38 is disposed next to stepper wheel 36 and the strip web 18 passes between the back-up roller 38 and the stepper wheel 36. The back-up roller 38 may be rotatably mounted on a bracket 40 as shown in FIG. 3B. The stepper motor can be precisely controlled to permit the carrier strip web to be properly positioned relative the package preforms advanced by the bagmaking apparatus. In addition, the strip drive mechanism 30 can be programmed such that the stepper motor 32 will be automatically controlled, e.g., by a microprocessor.
The stepper wheel preferably includes a rubber wheel having, e.g., a 2 inch diameter and a 3 inch width.
The rubber wheel fractionally engages the strip material web 18 and cooperates with back-up roller 38 to advance the web.
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Those skilled in the art will recognize, of course, than means for advancing the carrier strip web other than the above-described snepper motor may be used. For example, an air cylinder device which advances the strip web with air powered mechanical movements may be used in lieu of the stepper motor mechanism.
With attention direcced to FIGS. 2A-2C, sealing jaw 52 of sealing station 50 and sealing block 62 of
ID lower sealing assembly 60 are shown therein in detail.
Sealing jaw 52 includes an upper sealing portion 54 and a lower sealing portion 56 separated by a groove 58.
The groove 58 extends a limited distance from adjacent the outer surface of sealing portions 54, 56 into the interior of sealing jaw 52. See FIG. 2C. Groove 58 preferably contains a knife mechanism (not shown) which severs the package preform into a. lower filled package and an upper empty package as described above.
Specifically, upper sealing portion 54 forms the lower transverse seal of the upper package and lower sealing portion 56 forms the upper transverse seal of the filled lower package. After the knife mechanism separates the packages, the upper package, the bottom edge of which now has been sealed, may be filled and advanced downward, wherein further actuation of the sealing jaws 52, 53 seals the top of the same package.
The present invention attaches the filled sealed packages to the display strip 18 simultaneously with the forming of transverse seals as described above.
Attached to the sealing jaws 52, 53 by any suitable means are, respectively, sealing blocks 62, 63 of lower sealing assembly 60. As seen in FIGS, l and 2C, display carrier web 18 passes from take-up spool 20, past strip drive mechanism 30, through sealing jaw 52,
AP/P/ 96/00876
and into engagement with the package. For this purpose, sealing jaw 52 is provided with an elongated slot 68 extending therethrough. A cut-out portion 66 of sealing jaw 52 cooperates with sealing block 62 to define slot 63. In particular, sealing block 62 preferably is secured to sealing jaw 52 so as to cover cut-out portion 66. See FIG. 2B. Sealing block 62 also preferably has a width that is slightly greater than the width of cut-out portion 55 but less than the overall width of sealing jaw 52.
Lower sealing blocks 62, 63 have mating seal elements 64 disposed thereon as best seen in FIGS. 2A and 2B. The sealing elements 64 cf each block 62, 63 are aligned so as to engage each other when the sealing jaws 52, 53 are brought together. The display carrier strip web 18 passes into slot 68 cf sealing jaw 52 and then downward from the slot over the sealing elements 64 of sealing block 62. See FIGS. 1, 2A and 2C. This positions the display carrier strip 18 in close proximity with the unsealed top edge of a filled package 72, shown in phantom in FIG. 1. In addition to sealing the top edge of the filled package 72 (and the bottom edge of an overlying empty package), actuation of the sealing jaws 52, 53 detachably secures the top edge of filled package 72 to the display carrier strip 18.
Lower sealing blocks 62, 63 preferably have a plurality of sealing elements 64 disposed thereon which secure the filled package to the display carrier strip 18 at locations corresponding to the position and number of sealing elements 64. In a preferred embodiment, three sealing elements 64 are included on each sealing block 62, 63. However, those skilled in the art will recognize' that different numbers and
AP/P/ 9 6 / 0 0 8 7 6 configurations of sealing elements may be used without departing from the present invention.
Sealing blocks 62, 63 heat-seal the top edge of the filled package to the display carrier strip 18 upon actuation of the sealing jaws 52, 53. The sealing elements 64 securely affix the package to the strap 18 such that the package may be easily removed from the carrier strip without damaging the sealed condition of the filled, sealed package. The material from which display carrier strip 18 is formed adheres to the packaging material by point heat and pressure applied by sealing blocks 62, 63. Thus, the actuating motion of sealing jaws 52, 53 seals the top edge of the filled package and seals the package to the display carrier strip. This arrangement greatly simplifies the overall procedure and is a significant improvement over prior , art systems.
The carrier strip 18, with the filled, sealed packages 70 attached thereto, is carried by a conveyor mechanism 80 to a location where the strip and packages are prepared for distribution. The flexibility of the display carrier strip permits the same to be case packed with the packages attached thereto for easy storage and/or transportation.
FIGS. 4A-4C show a display strip produced according to the present invention and having a plurality of packages secured thereto in removable fashion. The display carrier strip 100 includes an adhesive hanger member 110 which serves to secure the entire assembly to a suitable support surface. Of course, any other support or hanger means may be used. The strip 100 has packages 120 removably attached thereto by heat seal connections 130 formed by the strip seal bars or blocks 62, 63 as described above.
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AP .0G710
FIGS. 4A and 4B show a display carrier strip 100 fully covered w;:h packages 120. FIG. 4C shows the product display scrip of FIGS. 4A and 4B with several packages removed. The releasable heat seal connections 130, which permit removal of the packages 120 without damaging cheir sealed condition, are visible on the portion cf the display carrier strip 100 from which packages have been removed.
It is apparent that the method and apparatus of the present invention permit the removable attachment of filled, sealed flexible packages to a display carrier scrip without the problems present in prior art systems. The attachment of the packages to the display carrier strip is carried out using the existing motion of the sealing jaws which form the top and bottom edge seals of each package. A precisely controlled strip drive mechanism cooperates with the sealing jaws to eliminate prior art problems in package control and positioning. Moreover, the attachment mechanism for securing the packages to the carrier strip is greatly simplified over prior art systems. Consequently, the present invention significantly reduces manufacturing cost compared with conventional package attachment systems .
Other features and advantages of the present invention will readily occur to those skilled in the art, as will many modifications and alterations in the preferred embodiments of the invention described herein, all of which may be achieved without departing from the spirit and the scope of the invention as defined by the appended claims.
Claims (15)
1. An apparatus for manufacturing a plurality of sealed packages which are detachably secured to a display carrier strip, the apparatus comprising:
a bagmaking device for forming a package preform,
2. An apparatus according to claim l, wherein said sealing station includes a pair of sealing jaws for forming the top and bottom seals of adjacent packages and a pair of strip seal bars for detachably
3. An apparatus according to claim 2, wherein one of the two sealing jaws includes a slot extending therethrough and the carrier strip passes through the
AP/P/ 9 6 / 0 0 8 7 6
A.P . υ u 7 1 Ο slot in the one sealing jaw to a location adjacent an 5 end of a package.
4. An apparatus according to claim 3, wherein the slot extending through the one sealing jaw is defined between one of the strip seal bars and a cutout portion of the one sealing jaw.
5 through the opening in the one sealing jaw and toward the sealing station.
19. A method of simultaneously sealing one end of a package and removably attaching the package to a display strip, the method comprising steps of:
positioning a package having at least one end 5 adjacent a pair of sealing jaws such that the one end of the package is disposed between the jaws;
feeding a display strip through a slot formed in one of the sealing jaws to a location adjacent the end of the package; and simultaneously sealing the end of the package and removably attaching the display strip to said end of the package.
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20. A sealing apparatus for sealing an end of a package preform and simultaneously securing the packaae preform to a carrier strip, the apparatus comprising:
a sealing assembly including a pair of sealing 5 jaws for sealing an end of a package preform disposed between the sealing jaws, wherein one of the sealing jaws has an opening through which a carrier strip may be fed into close proximity with the package preform; and
5 the sealing jaws to form a transverse package seal simultaneously activates the strip seal blocks to removably secure a package to the display carrier strip.
18. A method according to claim 16, wherein the strip di-i vp device includes a stepper motor and a stepper wheel, and the stepper motor rotates the stepper wheel to advance the display carrier strip web
5 the sealing jaws.
17. A method according to claim 16, wherein the sealing jaws of said seal-forming means each include a strip seal block for detachably securing the carrier strip to the package preform, and wherein activation of
5 carrier strip.
16. A method according to claim 15, wherein one sealing jaw includes an opening through which the
5 activation of the sealing jaws to form a transverse package seal activates the seal bars to removably secure a package to the display carrier strip.
5 carrier strip web toward the sealing station.
7P7 3 6 / 0 0 8 7 6
5 to form the transverse package seal activates the seal bars to removably secure a package to the display carrier strip.
5. An apparatus according to claim 3, wherein a first strip seal bar is secured to a first sealing jaw and a second strip seal bar is secured to a second sealing jaw, and wherein activation of the sealing jaws
5 securing the packages to the carrier strip.
5 the preform configured to receive product;
a sealing station disposed adjacent said bagmaking device, the sealing station including sealing jaws for forming a transverse seal across the preform to form a top seal of a filled package extending below the
6. An apparatus according to claim 1, wherein the strip seal bars include a plurality of mating seal elements. A·
7 . An apparatus according to claim 1, wherein the strip drive device includes a stepper motor and a stepper wheel, and the stepper motor rotates the stepper wheel to controllably advance the display
8 . An apparatus for manufacturing a plurality of sealed packages which are detachably secured to a display carrier strip, the apparatus comprising:
means for forming a package preform configured to 5 receive product;
a sealing station disposed below said means for forming the package preform, the sealing station including means for forming a transverse seal across
AP.00710 ohe preform to form a cop seal of a filled package 10 extending below the sealing station and a bottom seal of a package to be filled extending above the sealing station;
means for feeding a continuous carrier display strip to a location adjacent said seal-forming means;
15 means for detachably securing an end of each package to the carrier display strip simultaneously with the sealing of an end of the package; and means for separating adjacent preforms along the Q) transverse seal to form. the bottom and top seals of
20 packages extending, respectively, above and below the sealing station;
whereby the packages are secured to the carrier strip so as to be selectively removable therefrom without damaging the sealed condition of the packages.
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15.
carrier strip may be passed into close proximity with the Dackaas oreform and detachably secured thereco by
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9. An apparatus according to claim 8, wherein said seal-forming means includes a pair of sealing jaws for forming the top and bottom seals of adjacent packages .
o _ 10. An apparatus according to claim 9, wherein one of the sealing jaws of said seal-forming means includes a slot extending therethrough for feeding the carrier strip therethrough and against a package.
10 at least one carrier strip sealing element for detachably securing the package preform to the carrier strip simultaneously with the sealing of the end cf the package preform;
whereby a filled sealed package formed from the
10 detachably securing the filled package to a display carrier strip by affixing the top seal of the . filled package'to the carrier strip simultaneously with forming said top seal of the filled package.
15. A method according to claim 14, wherein the sealing of the preforms at the sealing station is performed by sealing jaws which simultaneously detachably secure an end of the filled package to the
10 sealing station and a bottom seal of a package to be filled extending above the sealing station;
a strip drive device for feeding a continuous carrier display strip to a location adjacent the sealing station; and
15 at least one strip seal bar for detachably securing an end of each package to the carrier display strip simultaneously with the sealing of an end of the package by the sealing jaws;
whereby filled sealed packages are secured to the
20 carrier display strip and can be removed therefrom without damaging the sealed condition of the packages.
11. An apparatus according to claim 10, wherein the sealing jaws of said seal-forming means each include a strip seal bar for detachably securing the carrier strip to the package preform, and wherein
12. An apparatus according to claim 11, wherein the slot extending through the one sealing jaw is disposed between the strip seal bar and a lower portion of the one sealing jaw.
13. An apparatus according to ciaim 8, wherein the strip drive device includes a stepper motor which rotates a stepper wheel for frictionally engaging and advancing the display carrier strip web toward the sealing station.
14. A method of manufacturing a filled, sealed package which is removably secured to a continuous display strip, the method comprising steps of:
forming a package preform configured to receive 5 product from a product supply source;
forming a transverse seal across the preform to form a top seal of a filled package extending below the sealing station and a bottom seal of a package to be filled extending above the sealing station; and
15 preform may be removed from the strip without damaging the sealed condition cf the package.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/194,354 US5433060A (en) | 1994-02-10 | 1994-02-10 | Automated method and apparatus for detachably securing flexible packages to a display strip |
Publications (2)
Publication Number | Publication Date |
---|---|
AP9600876A0 AP9600876A0 (en) | 1997-01-31 |
AP710A true AP710A (en) | 1998-12-23 |
Family
ID=22717259
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
APAP/P/1996/000876A AP710A (en) | 1994-02-10 | 1995-01-12 | Automated method and apparatus for detachably securing flexible packages to a display strip. |
Country Status (34)
Country | Link |
---|---|
US (1) | US5433060A (en) |
EP (1) | EP0742772B1 (en) |
JP (1) | JP3957743B2 (en) |
KR (1) | KR100241920B1 (en) |
CN (1) | CN1058459C (en) |
AP (1) | AP710A (en) |
AT (1) | ATE180729T1 (en) |
AU (1) | AU681242B2 (en) |
BG (1) | BG63110B1 (en) |
BR (1) | BR9506764A (en) |
CA (1) | CA2182006C (en) |
CZ (1) | CZ232896A3 (en) |
DE (1) | DE69510037T2 (en) |
DK (1) | DK0742772T3 (en) |
EE (1) | EE03229B1 (en) |
EG (1) | EG20559A (en) |
ES (1) | ES2135042T3 (en) |
FI (1) | FI963123A (en) |
GR (1) | GR3030921T3 (en) |
HU (1) | HU216411B (en) |
LT (1) | LT4210B (en) |
LV (1) | LV11677B (en) |
MD (1) | MD1720B2 (en) |
MX (1) | MX9603315A (en) |
NO (1) | NO308696B1 (en) |
NZ (1) | NZ279115A (en) |
OA (1) | OA10461A (en) |
PL (1) | PL178172B1 (en) |
RO (1) | RO117085B1 (en) |
RU (1) | RU2136552C1 (en) |
SI (1) | SI9520022B (en) |
SK (1) | SK103796A3 (en) |
UA (1) | UA41397C2 (en) |
WO (1) | WO1995021770A1 (en) |
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