USRE34323E - Packaging film product - Google Patents
Packaging film product Download PDFInfo
- Publication number
- USRE34323E USRE34323E US07/497,305 US49730590A USRE34323E US RE34323 E USRE34323 E US RE34323E US 49730590 A US49730590 A US 49730590A US RE34323 E USRE34323 E US RE34323E
- Authority
- US
- United States
- Prior art keywords
- film
- web
- edge
- area
- handle strip
- 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 - Lifetime
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D75/00—Packages comprising articles or materials partially or wholly enclosed in strips, sheets, blanks, tubes, or webs of flexible sheet material, e.g. in folded wrappers
- B65D75/52—Details
- B65D75/54—Cards, coupons, or other inserts or accessories
- B65D75/56—Handles or other suspension means
- B65D75/566—Hand holes or suspension apertures
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S206/00—Special receptacle or package
- Y10S206/806—Suspension
Definitions
- the present invention is concerned with a packaging film product for the packaging of paper rolls or other products into consumer packages containing one or, preferably, several product units and provided with a handle.
- the packaging film product concerned is meant expressly for mechanized production of consumer packages, wherein the product units are packaged automatically into consumer packages that contain a certain number of product units and that are provided with a handle.
- the film is suitable for automatic packaging of small paper rolls, such as towel paper rolls or toilet paper rolls, into consumer packages. It may, however, also be applied to the production of group packages for other products.
- the starting point has been the packaging film itself, wherein attempts have been made to make the film such that, in spite of processability by means of conventional packaging equipment, the film provides a package with a handle without additional equipment or operations proper, in the packaging process itself.
- This objective has been reached by means of a packaging film product or preparation, whose essential characteristics come out from the accompanying claim 1.
- FIG. 1 illustrates the packaging film product in accordance with the invention
- FIG. 2 illustrates a finished product package packaged into the film product concerned
- FIG. 3 illustrates another embodiment of the packaging film product in accordance with the invention.
- the packaging film product in accordance with the invention has been produced, e.g., as plastic film web 1 or as some other suitable film web so that the edge border 1a and 1b of the web 1 have been folded as substantially equal widths towards each other onto the middle area of the web so that the edge borders cover at least a substantial proportion of the middle area of the web.
- a longitudinal handle strip 2 has been formed by joining the film layers, placed one above the other, together.
- grasping openings 3 or opening blanks have been prepared with a spacing corresponding to the spacing of the package units.
- the handle strip 2 may be prepared e.g., by means of hot sealing 4. In stead of heat sealing, it is, of course, also possible to use other modes of joining, such as glueing.
- the grasping openings 3 may be prepared, e.g., by means of an appropriately heated tool so that the film layers adhere to each other at the edge portions of the opening, whereby a firm and tidy grasping opening is provided.
- the openings 3 may be just perforated tear-off openings. As adequate grip is also provided by means of a longitudinal linear cut or linear tear perforation prepared in stead of the opening 3 as shown in FIG. 3 in FIG. 3.
- the borders 1a and 1b can be extended across the middle area of the web 1 either so that they meet substantially in the middle of the middle area, or so that a space remains between the borders.
- the said intermediate space may be filled, e.g., with a loose film strip of a width equal to the width of the said space, so that the film product package, to be rolled or folded, becomes of equal thickness over its entire width.
- edge borders 1a and 1b may be folded either in the way shown in FIG. 1, so that they meet at the middle of the transverse direction of the two-fold web, or alternatively as shifted by the width of the handle strip 2 towards the opposite edge of the two-fold web.
- the handle strip concerned may be, in advance, provided with a tear perforation 5 between the grasping openings in view of facilitating the separating of the portion of film web required for each package.
- a tear perforation 5 between each package unit, there is preferably additionally a second tear perforation 5' at the side of the above perforation 5.
- the tear perforation or perforations may, however, be omitted in advance, and be prepared only at the packaging stage, at which stage the packaging film web is even otherwise, as a rule, perforated in the transverse direction so as to separate the subsequent package blanks from each other in the packaging equipment before ultimate closing of the packages.
- the packaging film concerned When the packaging film concerned is used, it can be fed, e.g., from a roll or from a folded bundle into the packaging equipment, wherein its run is guided so that the film first forms a tube open at one side, into which the product group units, running one after the other along a particular conveyor track, are fed; hereupon the tube is controlled so that it is closed, so that the folds 1a and 1b overlap each other to some extent.
- the edge borders are joined together within the overlapping area, e.g., by using hot sealing.
- the speed of progress of the product group units travelling along with the tube is accelerated to some extent after the joining of the longitudinal joint, whereby the units are detached from each other as the packaging film is cut into pieces along the transverse perforations made between the units.
- the packaging film product in accordance with the present invention may also be used in packaging machines of other types.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Packages (AREA)
- Wrappers (AREA)
- Supplying Of Containers To The Packaging Station (AREA)
- Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
- Steroid Compounds (AREA)
- Surface Acoustic Wave Elements And Circuit Networks Thereof (AREA)
Abstract
Packaging film product for the packaging of paper rolls or equivalent into a consumer package provided with a handle. The packaging film product consists of a web-like film (1) wherein the edge borders (1a, 1b) of the film are folded towards each other over the middle portion of the film remaining between them, substantially over equal distances so that the edge borders cover a substantial part of the middle portion that remains in between. At one edge of the web folded in this way, a longitudinally handle strip (2) has been produced by joining together the film layers that are placed one above the other, and grasping openings (3) or opening blanks have also been made into the handle strip with a mutual spacing corresponding to the spacing of the package units.
Description
The present invention is concerned with a packaging film product for the packaging of paper rolls or other products into consumer packages containing one or, preferably, several product units and provided with a handle. The packaging film product concerned is meant expressly for mechanized production of consumer packages, wherein the product units are packaged automatically into consumer packages that contain a certain number of product units and that are provided with a handle. In the first place, the film is suitable for automatic packaging of small paper rolls, such as towel paper rolls or toilet paper rolls, into consumer packages. It may, however, also be applied to the production of group packages for other products.
It is in particular various paper roll products that are packaged into consumer packages that, as a rule, contain 2, 4, 6, 8 or 12 rolls by wrapping the rolls as a relatively tight bundle into a plastic film wrapping. In this way, the package becomes tidy, and it is relatively easy to handle in the store. However, it is a problem of the said prior-art packages that they occupy an unduly large space in the shopping bag of the consumer, relative their weight, even though they in themselves, being ready packages, could also be carried separately if the package had some sort of a handle member for this purpose.
A solution has been sought for the said problem in the Finnish Patent Application No. 840900 by means of the package production method described therein, in which a handle portion is provided for the ultimate package as a part of the production of the package. The use of the said method, however, causes its arrangements of additional devices in the packaging equipment even though in this way quite a usable package is achieved.
In the present invention, a solution has been sought for the said handle problem of the package out of a different starting point, as compared with the method described in the said Patent Application No. 840900. In the present invention, the starting point has been the packaging film itself, wherein attempts have been made to make the film such that, in spite of processability by means of conventional packaging equipment, the film provides a package with a handle without additional equipment or operations proper, in the packaging process itself. This objective has been reached by means of a packaging film product or preparation, whose essential characteristics come out from the accompanying claim 1.
The invention will be described by means of the attached drawing, wherein
FIG. 1 illustrates the packaging film product in accordance with the invention,
FIG. 2 illustrates a finished product package packaged into the film product concerned and
FIG. 3 illustrates another embodiment of the packaging film product in accordance with the invention.
The packaging film product in accordance with the invention has been produced, e.g., as plastic film web 1 or as some other suitable film web so that the edge border 1a and 1b of the web 1 have been folded as substantially equal widths towards each other onto the middle area of the web so that the edge borders cover at least a substantial proportion of the middle area of the web. At one edge of the folded, two-fold web, a longitudinal handle strip 2 has been formed by joining the film layers, placed one above the other, together. Into the said handle strip, grasping openings 3 or opening blanks have been prepared with a spacing corresponding to the spacing of the package units.
The handle strip 2 may be prepared e.g., by means of hot sealing 4. In stead of heat sealing, it is, of course, also possible to use other modes of joining, such as glueing. The grasping openings 3 may be prepared, e.g., by means of an appropriately heated tool so that the film layers adhere to each other at the edge portions of the opening, whereby a firm and tidy grasping opening is provided. Alternatively, the openings 3 may be just perforated tear-off openings. As adequate grip is also provided by means of a longitudinal linear cut or linear tear perforation prepared in stead of the opening 3 as shown in FIG. 3 in FIG. 3.
The borders 1a and 1b can be extended across the middle area of the web 1 either so that they meet substantially in the middle of the middle area, or so that a space remains between the borders. The said intermediate space may be filled, e.g., with a loose film strip of a width equal to the width of the said space, so that the film product package, to be rolled or folded, becomes of equal thickness over its entire width.
The edge borders 1a and 1b may be folded either in the way shown in FIG. 1, so that they meet at the middle of the transverse direction of the two-fold web, or alternatively as shifted by the width of the handle strip 2 towards the opposite edge of the two-fold web.
The handle strip concerned may be, in advance, provided with a tear perforation 5 between the grasping openings in view of facilitating the separating of the portion of film web required for each package. However, between each package unit, there is preferably additionally a second tear perforation 5' at the side of the above perforation 5. The tear perforation or perforations may, however, be omitted in advance, and be prepared only at the packaging stage, at which stage the packaging film web is even otherwise, as a rule, perforated in the transverse direction so as to separate the subsequent package blanks from each other in the packaging equipment before ultimate closing of the packages.
When the packaging film concerned is used, it can be fed, e.g., from a roll or from a folded bundle into the packaging equipment, wherein its run is guided so that the film first forms a tube open at one side, into which the product group units, running one after the other along a particular conveyor track, are fed; hereupon the tube is controlled so that it is closed, so that the folds 1a and 1b overlap each other to some extent. Hereupon the edge borders are joined together within the overlapping area, e.g., by using hot sealing. The speed of progress of the product group units travelling along with the tube is accelerated to some extent after the joining of the longitudinal joint, whereby the units are detached from each other as the packaging film is cut into pieces along the transverse perforations made between the units. After the separation, the path of movement of the individual units is deviated by about 90°, whereupon the portions of film web extending beyond the ends of the packages are folded so that they cover the ends, and are sealed together. The result is a package substantially in accordance with FIG. 2, which is provided with a handle 2 that has a grasping opening 3.
The packaging film product in accordance with the present invention may also be used in packaging machines of other types.
Claims (6)
1. Packaging film product for forming package units for the packaging of paper rolls or corresponding products, wherein each package unit contains a product unit, comprising a film web having a middle area and edge border areas adjacent the middle area (1) and folded substantially over equal distances towards each other onto the middle area so that the edge border areas (1a, 1b) cover at least a substantial part of the middle area of the web, a longitudinal handle strip (2) formed by joining a portion of one of the edge border areas with the opposing portion of the film web, and grasping openings (3) in the handle strip, the grasping openings being spaced apart corresponding to the spacing of the package units.
2. Packaging film product as claimed in claim 1, wherein the grasping openings (3) define edge zones, the grasping openings formed by means of a heated tool for joining the film layers together at the edge zones of the openings.
3. Packaging film product as claimed in claim 1, wherein the grasping openings are linear cuts made into the handle strip (2).
4. Packaging film product as claimed in claim 1, wherein the handle strip (2) has at least one transverse perforation (5) between the package units.
5. Packaging film products as claimed in claim 1, wherein the grasping openings are linear perforations made into the handle strip (2). .Iadd.
6. An article of manufacture including a continuous web of a film for use in the manufacture of discrete packages each adapted to hold at least one product, said article of manufacture comprising:
a continuous web of film folded over itself along a longitudinally extending fold line to form thereby a first longitudinally extending area having a first free edge and having a second free edge;
said first area and said second area being joined longitudinally along a seam spaced but adjacent to said fold line to form thereby a continuous handle strip, said first and second free edges being spaced from said seam and said fold line, said handle strip having formed therein a plurality of spaced grasping openings whose longitudinal spacing corresponds to the intended width of each discrete package;
said first edge of said first area comprising means for securing said first area longitudinally along the film web with said second free edge of said second area; and
a plurality of demarcating means spaced longitudinally along the length of the web and spaced apart a distance corresponding the intended width of each package, said demarcating means adapted to facilitate separation of said discrete packages..Iaddend.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US07/497,305 USRE34323E (en) | 1984-05-09 | 1990-03-22 | Packaging film product |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FI841854A FI69596C (en) | 1984-05-09 | 1984-05-09 | FOERPACKNINGSFILMPRODUKT |
PCT/FI1985/000043 WO1985005087A1 (en) | 1984-05-09 | 1985-05-03 | Packaging film product |
US07/497,305 USRE34323E (en) | 1984-05-09 | 1990-03-22 | Packaging film product |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US06830582 Reissue | 1985-05-03 |
Publications (1)
Publication Number | Publication Date |
---|---|
USRE34323E true USRE34323E (en) | 1993-07-27 |
Family
ID=8519042
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US06/830,582 Ceased US4732272A (en) | 1984-05-09 | 1985-05-03 | Packaging film product |
US07/497,305 Expired - Lifetime USRE34323E (en) | 1984-05-09 | 1990-03-22 | Packaging film product |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US06/830,582 Ceased US4732272A (en) | 1984-05-09 | 1985-05-03 | Packaging film product |
Country Status (11)
Country | Link |
---|---|
US (2) | US4732272A (en) |
EP (1) | EP0181877B1 (en) |
JP (1) | JPS61502117A (en) |
AT (1) | ATE37517T1 (en) |
AU (1) | AU572653B2 (en) |
DE (1) | DE3565238D1 (en) |
DK (1) | DK158260C (en) |
FI (1) | FI69596C (en) |
NO (1) | NO164346C (en) |
SU (1) | SU1449006A3 (en) |
WO (1) | WO1985005087A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6513657B2 (en) * | 2001-04-26 | 2003-02-04 | 3M Innovative Properties Co. | Product packaging with handle-forming tearable tape system |
US20050249897A1 (en) * | 2002-06-19 | 2005-11-10 | Sleever International Company | Wrap for packaging at least one object, of the type consisting of a shrinkable plastic material sleeve |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2658786B1 (en) * | 1990-02-23 | 1992-07-17 | Kaysersberg Sa | PROCESS FOR OBTAINING PACKAGING AND PACKAGING. |
FI6456U1 (en) * | 2004-08-20 | 2004-11-11 | Kemira Growhow Oy | Bag |
Citations (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1939794A (en) * | 1932-01-26 | 1933-12-19 | Robert C Seybold | Wrapping sheet |
US1998989A (en) * | 1934-04-04 | 1935-04-23 | Internat Mailing Tube And Wrap | Package wrapper |
US2360931A (en) * | 1941-11-08 | 1944-10-24 | Morton S Brockman | Carrying case |
US2805791A (en) * | 1955-06-13 | 1957-09-10 | Fed Paper Board Co Inc | Article carrier |
US2829817A (en) * | 1954-06-28 | 1958-04-08 | Item Dev Engineering Associate | Cake box |
US2975934A (en) * | 1958-09-17 | 1961-03-21 | Truman W Powell | Packaging carrier separable into individual and multiple carrier units |
US2996179A (en) * | 1960-09-09 | 1961-08-15 | Bow Solder Products Co Inc | Combination wrapper protector and sling hanger for spooled merchandise |
CH395021A (en) * | 1957-02-16 | 1965-07-15 | Lennartz Walter | File envelope made of thermoplastic plastic |
US3199756A (en) * | 1963-04-09 | 1965-08-10 | Coroga Company | Package chain assembly and conveying means |
FR1513052A (en) * | 1966-03-16 | 1968-02-09 | Flexico France Sarl | Improvements to plastic bags or sachets |
GB1141841A (en) * | 1964-12-01 | 1969-02-05 | Robinson Plastic Films Ltd | Bag with a reinforced end portion |
US3430845A (en) * | 1967-11-27 | 1969-03-04 | Lion Fat Oil Co Ltd | Sealed cuboid container utilizing a sheet of synthetic resin film for packing powder or fine particles and its fabricating method |
US3462069A (en) * | 1967-01-24 | 1969-08-19 | Heikki S Suominen | Thermoplastic carrier bags |
US3730418A (en) * | 1971-04-12 | 1973-05-01 | American Science & Eng Inc | Living materials shipping system |
US3863837A (en) * | 1972-08-17 | 1975-02-04 | Gilbreth Co | Cardless head board merchandising package |
DE2702958A1 (en) * | 1977-01-25 | 1978-07-27 | Sessbrugger & Van Delden | Protective covering for pointed or sharp-edged objects - is folded over from rectangular piece of thick paper or plastics web |
US4234086A (en) * | 1979-10-02 | 1980-11-18 | Dorton Howard E | Apparatus for handling soiled surgical sponges |
US4291807A (en) * | 1979-11-07 | 1981-09-29 | International Folding Paper Box Co., Inc. | Folding box |
US4456122A (en) * | 1982-12-20 | 1984-06-26 | Schott International, Inc. | Package and display system |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1722052A (en) * | 1927-01-11 | 1929-07-23 | Robert M Lackey | Carry bundle strap |
US2918206A (en) * | 1955-10-18 | 1959-12-22 | Interstate Folding Box Co | Handle structures for boxes and method of fabricating same |
US4454979A (en) * | 1980-09-05 | 1984-06-19 | Toyo Seikan Kaisha Ltd. | Laminated packing bag with spout formed from handle portion |
-
1984
- 1984-05-09 FI FI841854A patent/FI69596C/en not_active IP Right Cessation
-
1985
- 1985-05-03 DE DE8585902043T patent/DE3565238D1/en not_active Expired
- 1985-05-03 EP EP85902043A patent/EP0181877B1/en not_active Expired
- 1985-05-03 AT AT85902043T patent/ATE37517T1/en not_active IP Right Cessation
- 1985-05-03 AU AU42385/85A patent/AU572653B2/en not_active Ceased
- 1985-05-03 WO PCT/FI1985/000043 patent/WO1985005087A1/en active IP Right Grant
- 1985-05-03 JP JP60501992A patent/JPS61502117A/en active Pending
- 1985-05-03 US US06/830,582 patent/US4732272A/en not_active Ceased
-
1986
- 1986-01-07 NO NO86860034A patent/NO164346C/en unknown
- 1986-01-08 DK DK007386A patent/DK158260C/en not_active IP Right Cessation
- 1986-01-08 SU SU864008364A patent/SU1449006A3/en active
-
1990
- 1990-03-22 US US07/497,305 patent/USRE34323E/en not_active Expired - Lifetime
Patent Citations (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1939794A (en) * | 1932-01-26 | 1933-12-19 | Robert C Seybold | Wrapping sheet |
US1998989A (en) * | 1934-04-04 | 1935-04-23 | Internat Mailing Tube And Wrap | Package wrapper |
US2360931A (en) * | 1941-11-08 | 1944-10-24 | Morton S Brockman | Carrying case |
US2829817A (en) * | 1954-06-28 | 1958-04-08 | Item Dev Engineering Associate | Cake box |
US2805791A (en) * | 1955-06-13 | 1957-09-10 | Fed Paper Board Co Inc | Article carrier |
CH395021A (en) * | 1957-02-16 | 1965-07-15 | Lennartz Walter | File envelope made of thermoplastic plastic |
US2975934A (en) * | 1958-09-17 | 1961-03-21 | Truman W Powell | Packaging carrier separable into individual and multiple carrier units |
US2996179A (en) * | 1960-09-09 | 1961-08-15 | Bow Solder Products Co Inc | Combination wrapper protector and sling hanger for spooled merchandise |
US3199756A (en) * | 1963-04-09 | 1965-08-10 | Coroga Company | Package chain assembly and conveying means |
GB1141841A (en) * | 1964-12-01 | 1969-02-05 | Robinson Plastic Films Ltd | Bag with a reinforced end portion |
FR1513052A (en) * | 1966-03-16 | 1968-02-09 | Flexico France Sarl | Improvements to plastic bags or sachets |
US3462069A (en) * | 1967-01-24 | 1969-08-19 | Heikki S Suominen | Thermoplastic carrier bags |
US3430845A (en) * | 1967-11-27 | 1969-03-04 | Lion Fat Oil Co Ltd | Sealed cuboid container utilizing a sheet of synthetic resin film for packing powder or fine particles and its fabricating method |
US3730418A (en) * | 1971-04-12 | 1973-05-01 | American Science & Eng Inc | Living materials shipping system |
US3863837A (en) * | 1972-08-17 | 1975-02-04 | Gilbreth Co | Cardless head board merchandising package |
DE2702958A1 (en) * | 1977-01-25 | 1978-07-27 | Sessbrugger & Van Delden | Protective covering for pointed or sharp-edged objects - is folded over from rectangular piece of thick paper or plastics web |
US4234086A (en) * | 1979-10-02 | 1980-11-18 | Dorton Howard E | Apparatus for handling soiled surgical sponges |
US4291807A (en) * | 1979-11-07 | 1981-09-29 | International Folding Paper Box Co., Inc. | Folding box |
US4456122A (en) * | 1982-12-20 | 1984-06-26 | Schott International, Inc. | Package and display system |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6513657B2 (en) * | 2001-04-26 | 2003-02-04 | 3M Innovative Properties Co. | Product packaging with handle-forming tearable tape system |
US20050249897A1 (en) * | 2002-06-19 | 2005-11-10 | Sleever International Company | Wrap for packaging at least one object, of the type consisting of a shrinkable plastic material sleeve |
Also Published As
Publication number | Publication date |
---|---|
NO164346B (en) | 1990-06-18 |
WO1985005087A1 (en) | 1985-11-21 |
AU572653B2 (en) | 1988-05-12 |
DK7386A (en) | 1986-01-08 |
DK158260C (en) | 1990-09-10 |
FI69596B (en) | 1985-11-29 |
DK158260B (en) | 1990-04-23 |
ATE37517T1 (en) | 1988-10-15 |
NO860034L (en) | 1986-01-07 |
JPS61502117A (en) | 1986-09-25 |
SU1449006A3 (en) | 1988-12-30 |
DE3565238D1 (en) | 1988-11-03 |
AU4238585A (en) | 1985-11-28 |
NO164346C (en) | 1990-09-26 |
FI69596C (en) | 1986-03-10 |
EP0181877B1 (en) | 1988-09-28 |
FI841854A0 (en) | 1984-05-09 |
EP0181877A1 (en) | 1986-05-28 |
US4732272A (en) | 1988-03-22 |
DK7386D0 (en) | 1986-01-08 |
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