EP0596382A1 - Sac à poussières pour aspirateur - Google Patents

Sac à poussières pour aspirateur Download PDF

Info

Publication number
EP0596382A1
EP0596382A1 EP93117300A EP93117300A EP0596382A1 EP 0596382 A1 EP0596382 A1 EP 0596382A1 EP 93117300 A EP93117300 A EP 93117300A EP 93117300 A EP93117300 A EP 93117300A EP 0596382 A1 EP0596382 A1 EP 0596382A1
Authority
EP
European Patent Office
Prior art keywords
opening
filter bag
holding plate
dust filter
layers
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.)
Granted
Application number
EP93117300A
Other languages
German (de)
English (en)
Other versions
EP0596382B1 (fr
Inventor
Ralf Dr. Dipl. Chem. Sauer
Stefan Dipl. Phys. Kraut-Reinkober
Ludger Dipl.-Ing. Helmes
Werner Hoyer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Vorwerk and Co Interholding GmbH
Original Assignee
Vorwerk and Co Interholding GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Vorwerk and Co Interholding GmbH filed Critical Vorwerk and Co Interholding GmbH
Priority to DE9321543U priority Critical patent/DE9321543U1/de
Publication of EP0596382A1 publication Critical patent/EP0596382A1/fr
Application granted granted Critical
Publication of EP0596382B1 publication Critical patent/EP0596382B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
    • A47L9/10—Filters; Dust separators; Dust removal; Automatic exchange of filters
    • A47L9/14—Bags or the like; Rigid filtering receptacles; Attachment of, or closures for, bags or receptacles
    • A47L9/1427—Means for mounting or attaching bags or filtering receptacles in suction cleaners; Adapters
    • A47L9/1436—Connecting plates, e.g. collars, end closures
    • A47L9/1445—Connecting plates, e.g. collars, end closures with closure means
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
    • A47L9/10—Filters; Dust separators; Dust removal; Automatic exchange of filters
    • A47L9/14—Bags or the like; Rigid filtering receptacles; Attachment of, or closures for, bags or receptacles
    • A47L9/1427—Means for mounting or attaching bags or filtering receptacles in suction cleaners; Adapters
    • A47L9/1436—Connecting plates, e.g. collars, end closures

Definitions

  • the invention relates to a dust filter bag for a vacuum cleaner, with a holding plate made of a solid paper material, for example cardboard-paper material, with which a dust bag is, for example, adhesively bonded, which holding plate has a sealable opening for an intake pipe of a vacuum cleaner, the Opening can be closed with a separate closure element, which can be moved from an open position, in a secondary arrangement to the opening, into a closed position.
  • the bag-forming filter material is fastened in the vicinity of the edge on one broad surface of the holding plate, preferably in a sealing adhesive connection.
  • the bag body can be folded to save space by folding the support plate down into the plane of the wall-forming layers of the bag body.
  • a dust filter bag of this type is known for example from DE-OS 2 407 478.
  • the separate locking tab there consists of a strip which is displaceably guided between two layers of the holding plate and which has a hole. In the case of a hole that is approximately congruent to the opening of the holding plate, the connecting piece of the suction pipe can be docked there in an operationally suitable manner.
  • a strip holding in self-adhesive connection can also be used as the closure flap, which strip can be transferred from its storage meander fold into a position covering and closing the opening.
  • the object of the invention is to design an improved dust filter bag.
  • a dust filter bag that is structurally and operationally improved is implemented.
  • the opening area which is exposed to not inconsiderable mechanical stress, is highly stable.
  • the procedure is such that the closure element rests on at least two layers of the solid paper material, at least in an open position, and that a rubber ring seal is gripped between these two layers in the area of the opening.
  • a secure setting of a rubber ring seal for the connecting piece of the vacuum cleaner has been achieved.
  • the holding plate also has, at least in the region of the opening, three layers arranged one above the other in a stacked arrangement.
  • the area of the opening is not only made of the highly stable three-layer laminate, it is also realized that the closure element, for example a closure tab, is only within the contours of the holding plate, both in the open and in the closed position.
  • the closure element for example a closure tab
  • a joint between two (lower) layers is also used to accommodate the sealing element.
  • the fixation of the sealing element can be included in the laminate securing, for example by an adhesive or hot-melt layer also capturing the rubber ring seal in a position-securing manner. There is no additional fastening effort, as would be necessary, for example, with an overlying sealing film. Since a rather narrow peripheral bond zone is sufficient for the rubber ring seal, the stabilized composite material runs through to the edge of the support plate.
  • this edge generally has a specific contour to a corresponding storage zone of the vacuum cleaner, nose-like projections etc. are still very stable in themselves, even with a small dimension, even with a two-layer shape.
  • the only partial three-layer structure in the area of the opening leaves layer material available for further development measures.
  • an opening edge area of the middle layer is set back from opening edges of the upper and lower layers to form a latching opening. This creates an advantageous prerequisite for securing the position of a sealing tab sealing from the outside.
  • the middle layer has a larger diameter than the upper and lower layers with a concentric arrangement of the diameters.
  • the latching opening is supplemented to form a circumferential latching opening, so that it is not even necessary to assign the closure tab in a particularly targeted manner.
  • the holding plate be formed in three layers continuously on the edge side. This has the advantage of supporting the holding plate in the device-side receptacle on an equal basis, that is to say completely without tilting, the region remote from the opening being able to remain double-layered, ie layer material for other purposes Is available, for example, from this residual material, a foldable closure flap is designed over the opening.
  • All four illustrated exemplary embodiments show a dust filter bag, for example for a vacuum cleaner, which ends on the docking side with a hard part in the form of a holding plate 1.
  • the actual bag 3 extends from the back surface 2 and is glued to the edge.
  • the holding plate 1 consists of a cardboard paper material.
  • the holding plate 1 has a contour K, within which a closure element 10 (which will be explained in more detail below) is accommodated both in the open position (for example FIG. 1) and in the closed position (for example FIG. 10).
  • a closure element 10 which will be explained in more detail below
  • the second layer b also offers full-area support for the closure element 10.
  • the bag 3 can be folded to save space. When folded, it can be placed against the rear surface 2 (see, for example, FIG. 2). For this purpose, the narrow sides 4 of the bag 3 are drawn in in a V-shape. On the holding plate side, the inner fold branches into a Y-shaped branch, which ends directed towards the corner zones of the narrow side of the holding plate 1. The bottom of the bag 3 is closed by folding and gluing. The fold-out bears the reference number 5.
  • the open or mouth-side bag edge is fixed to the rear surface 2 of the holding plate 1 by angling the edge 6 there and gluing to said surface 2.
  • the corresponding adhesive layer is designated by 7.
  • the basically rectangular holding plate 1 is constructed continuously or predominantly in three layers.
  • the individual positions of the same outline are labeled a, b, c.
  • the uppermost layer a which is furthest from the bag, forms the front surface 8 of the holding plate 1.
  • the suction pipe or connecting piece of the vacuum cleaner not shown, is docked.
  • the individual layers a to c best hen preferably from a single folding blank, which is either placed zigzag one on top of the other or by folding a free layer between two other, ie folding two end positions against each other (see FIG. 6).
  • the individual layers a to c are broken through to form an opening 9. It is a circular opening. Their center is located in the plane of symmetry of the holding plate 1 which also forms the cutting line, the two halves of which are thus designed to be mirror-identical.
  • Said opening 9 can be sealed from the outside by means of a locking tab 10.
  • the latter is an integral part of the top layer a, that is to say formed from its material section by cutting free. With the aid of such a closure flap 10, the known aspiration of the dust-filled bag 3 can be reduced or even avoided when the volume is reduced by touching it.
  • the free cut is continuously labeled F.
  • the cardboard paper material has three layers, at least in the region of the opening 9.
  • the three-layer laminate stabilizes the docking area for the suction pipe or the suction nozzle of the vacuum cleaner, but also has the essential advantage of accommodating a rubber ring seal 11 between the joint-forming contact surfaces of two layers, which is easy to assign. They are preferably arranged between the second and third layers b and c. The edging can be seen particularly clearly from the sectional views.
  • the rubber ring seal 11 it is a highly elastic ring membrane whose clear diameter D1 is smaller than the clear diameter of the circular opening D2. Of course, it can also be a plastic film with the corresponding sealing property.
  • the radial clearance depth of the rubber ring seal corresponds approximately to the width of the border between the layers b and c.
  • the border depth is shown somewhat broader in the drawings.
  • the clear diameter D1 of the rubber ring seal 11 is dimensionally greater than that of the intake pipe or intake pipe, not shown.
  • the lateral wall of the latter runs approximately in the central region of the free-standing length of the rubber sealing ring 11.
  • the remaining length or the remaining area of the holding plate 1 is at least two layers. This area is expediently used in relation to the uppermost layer a to form the locking tab 10. In this way, no separate locking member needs to be manufactured and assigned. If the corresponding cut-out forming free cut does not go, or does not go essentially everywhere to the periphery of this position, the basic thickness x is nevertheless retained in the area of the holding plate 1 forming the make-up tab 10.
  • All of the locking tabs 10 also fold around a hinge zone 12 lying transversely to the length of the rectangular holding plate 1.
  • the latter is formed by a fold line.
  • the ease of folding can be increased, for example, by a perforation 13.
  • the center point P1 or center point of the opening 9 is at least as far from the hinge zone 12 as the center point P2 of the locking tab 10. Both lie on the plane or line of symmetry formed by the intersection lines.
  • the closure flap 10 has an elongated shield-like shape with an arcuate edge 14 formed at the free end. Its radius corresponds to that of the opening 9. The width y of this closure flap 10 corresponds at most to the diameter D2.
  • a locking lug 15 In front of this locking lug 15, the top layer a leaves a cleared cut-out area as an access recess 16. The latter is about the size of a fingertip, so that the locking lug 15 can easily be reached under with the fingernail to close the locking tab 10 from its immersion position in the uppermost position a into the closed position shown in FIG. 4.
  • latch 15 and latch opening 17 are expediently semicircular. The latching force achieved is so great that even with the holding plate 1 of the dust filter bag pointing downward, no dirt particles can fall out of the interior of the bag 3. Aspiration is also significantly reduced.
  • the middle layer b has a larger recess associated with the opening 9 than the top and bottom layers a, c.
  • the third layer c can also have a bulge 18 corresponding to the outline, congruent with the latching opening 17. Due to the high elasticity or flexibility of the rubber ring seal 11, this allows the catch 15 to dodge slightly in this direction, but is springed back by the zone of the rubber ring seal 11 which is released via the bulge 18.
  • the procedure is alternatively such that with a circular configuration of the opening 9 the middle layer b has a somewhat larger diameter than the diameter D2 of the top (a) and bottom layer c in corresponding to a concentric arrangement of the diameters, which leads to a larger latching grip under the locking flap 10 if it has a correspondingly widened latching lug 15 or is immersed with the entire edge 14 in a latching manner.
  • a further development is based on the fact that the rest, i.e. the area of the holding plate 1 facing away from the opening 9, in addition to the formation of the locking tab 10, is also used to create a holding bracket 19.
  • the latter has a U-shape. Its U-web 20 is circular.
  • the adjoining U-legs 21, which run parallel to the opening 9, are each rooted in a hinge zone 23. This also extends transversely to the length of the holding plate 1.
  • the hinge zones 23 are flush with the hinge zone 12 of the locking tab 10.
  • the hinge zones 23 also become formed by fold lines of the blank and can also be perforated.
  • the disposal position is shown in FIG. 12. There, the holding bracket 19 is angled into a folded-up position.
  • the dust filter bag can be easily removed from the vacuum cleaner housing and carried to the disposal site. Before that, of course, the locking tab 10 is brought into the locking position.
  • the closure tab 10 differs structurally from that of the first one in that its closing active plate part now does not overlap the rubber ring seal 11, but rather engages under rubber ring seal 11 with sections of its edge. This can be seen particularly clearly from FIGS. 10 and 11.
  • the web 27 leads to the hinge zone 12 of the locking tab 10, which is cut free in the interior of the U-shaped bracket 9.
  • the tongue 26 diametrically opposite the web 27 is supported on the opening edge 9 'of the uppermost layer a and, like the web 27, prevents the closure tab 10 from hanging into the interior of the bag 3 in the pressed-in position. Rather, the radially outgoing material extensions cause a resilient pressing force against the underside of the rubber ring seal 11 and, moreover, a completely perfect seal.
  • bracket 19 is not made of the material of the rest, i.e. area of the holding plate 1 remote from the opening is cut out, but from the areas having the opening 9.
  • This retaining bracket also has a U-shape and extends concentrically and radially outwards at a distance from the opening edge 9 'of the opening 9. Beyond this cut-out, material of the uppermost layer a remains, so that the basic thickness x is retained up to the periphery.
  • Said gripping niches 28 can be included in the formation of an assignment module in that projections on the housing side protrude there (not shown).
  • the holding plate 1 has several tooth-like, outward facing edges jumps 30, which enter into corresponding recesses in the housing and also serve to ensure tamper evidence.
  • Such tooth-like projections 30 prove to be quite stable, due to the predominantly three-layer structure.
  • the hinge zone 23 does not extend in the transverse central plane of the holding plate, but rather is offset somewhat in the direction of the opening 9. This compensates for the larger accumulation of material in the holding plate 1 there.
  • detection of the retaining bracket 19 results in a slight lifting of this zone, so that in any case a pouring position of the dust filter bag is avoided, so that no dirt particles can fall out when the closure position is missed. The mouth is higher.
  • the fourth exemplary embodiment differs from the former in that the component forming the tongue 26 is cut free in a zone extending to the edge of the holding plate 1, that is to say it has a longer gripping length.
  • the basic thickness x remains essentially unchanged, since the material of the uppermost layer a continues continuously laterally into the narrow tooth-like projections 30 there. There is a fork-shaped section.
  • V-shaped incisions 25 at the transition area to the web 27 no longer start directly in the band-shaped inlet zone between the web 27 and the disk-shaped section of the closure flap 10, but offset at an angle. This results in a slight shortening of the peripheral portions 24 in the circumferential direction, which can thereby be “threaded” even more easily into the opening 9 in order to come under the rubber ring seal 11.
  • a hole 31 arranged in the remaining area of the holding plate 1 and penetrating all three layers. This extends near the edge and lies in the plane of symmetry of the holding plate 1.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Filters For Electric Vacuum Cleaners (AREA)
  • Control And Other Processes For Unpacking Of Materials (AREA)
  • Medicines That Contain Protein Lipid Enzymes And Other Medicines (AREA)
EP93117300A 1992-11-03 1993-10-26 Sac à poussières pour aspirateur Expired - Lifetime EP0596382B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE9321543U DE9321543U1 (de) 1992-11-03 1993-10-26 Staubfilterbeutel für einen Staubsauger

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4237035A DE4237035A1 (de) 1992-11-03 1992-11-03 Staubfilterbeutel für einen Staubsauger
DE4237035 1992-11-03

Publications (2)

Publication Number Publication Date
EP0596382A1 true EP0596382A1 (fr) 1994-05-11
EP0596382B1 EP0596382B1 (fr) 1999-08-04

Family

ID=6471957

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93117300A Expired - Lifetime EP0596382B1 (fr) 1992-11-03 1993-10-26 Sac à poussières pour aspirateur

Country Status (16)

Country Link
US (1) US5468271A (fr)
EP (1) EP0596382B1 (fr)
JP (1) JPH06339446A (fr)
AT (1) ATE182765T1 (fr)
AU (1) AU669006B2 (fr)
CA (1) CA2102158A1 (fr)
CZ (1) CZ285576B6 (fr)
DE (2) DE4237035A1 (fr)
ES (1) ES2134234T3 (fr)
HU (1) HU212079B (fr)
MX (1) MX9306823A (fr)
NZ (1) NZ250095A (fr)
PL (1) PL172536B1 (fr)
SI (1) SI9300577A (fr)
SK (1) SK282519B6 (fr)
ZA (1) ZA938174B (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103876686A (zh) * 2012-12-21 2014-06-25 Seb公司 吸尘器及其吸尘器袋

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FR2713076B1 (fr) * 1993-12-03 1996-01-12 Seb Sa Dispositif d'obturation et d'éjection de sac d'aspirateur.
DE4432105A1 (de) * 1994-09-09 1996-03-14 Hoechst Ag Fluoro-alkyl/alkenyl-substituierte Benzoylguanidine, Verfahren zu ihrer Herstellung, ihre Verwendung als Medikament oder Diagnostikum sowie sie enthaltendes Medikament
US5613989A (en) * 1995-10-10 1997-03-25 Home Care Industries, Inc. Self-aligning self-sealing vacuum bag
US5688298A (en) * 1995-10-10 1997-11-18 Home Care Industries, Inc. Self-aligning, self-sealing vacuum bag
DE29601812U1 (de) * 1996-02-03 1996-03-14 Branofilter GmbH, 90599 Dietenhofen Anschlußstück eines Filterbeutels für Staubsauger
US5725620A (en) * 1996-06-10 1998-03-10 Home Care Industries, Inc. Manually closable vacuum cleaner bag
AU3907400A (en) * 1999-04-06 2000-10-23 Oreck Holdings, Llc Vacuum cleaner bag closure
US6379408B1 (en) 1999-04-06 2002-04-30 Oreck Holdings, Llc Mounting and closure structure for a bag, such as a vacuum cleaner bag
DE19948909A1 (de) * 1999-10-11 2001-04-12 Vorwerk Co Interholding Filterbeutel für einen Staubsauger
DE20013364U1 (de) * 2000-08-03 2001-02-08 Branofilter GmbH, 90599 Dietenhofen Filterbeutel
US6733555B1 (en) 2001-02-28 2004-05-11 Wildwood Industries, Inc. Vacuum bag collar
US6746501B1 (en) 2001-02-28 2004-06-08 Wildwood Industries, Inc. Vacuum bag collar with rotatable closure
JP4629288B2 (ja) * 2001-09-28 2011-02-09 東芝コンシューマエレクトロニクス・ホールディングス株式会社 掃除機用集塵フィルタ及びこれを備える電気掃除機
US20080016646A1 (en) * 2005-01-10 2008-01-24 Martin Gagnon Housing assembly for a vacuum
US7461430B2 (en) * 2005-01-10 2008-12-09 Broan-Nutone Llc Vacuum system and method
US20070095031A1 (en) * 2005-11-03 2007-05-03 Zahuranec Terry L Mounting collar for a filter bag
US7799107B2 (en) * 2006-03-15 2010-09-21 Techtronic Floor Care Technology Limited Self-sealing bag arrangement for a floor cleaning device
DE102007053151B4 (de) 2007-11-08 2025-05-08 Wolf Pvg Gmbh & Co. Kommanditgesellschaft Halteplatte für einen Staubsaugerbeutel und Verfahren zu deren Herstellung
DE102011105384A1 (de) * 2011-06-20 2012-12-20 Alexander Patzig Halteplatte für Staubsaugerbeutel
USD657510S1 (en) * 2011-08-12 2012-04-10 Electrolux Home Care Products, Inc. Vacuum cleaner bag flange
US8439997B2 (en) 2011-08-16 2013-05-14 Nss Enterprises, Inc. Vacuum sweeper apparatus including a filter bag and a method of installation
USD664317S1 (en) * 2011-08-16 2012-07-24 Nss Enterprises, Inc. Top plate for a filter bag
CN104228266A (zh) * 2014-09-19 2014-12-24 上海曾曦净化科技有限公司 一种用于吸尘器过滤袋卡口板的新型复合板材及其加工方法
EP4331455A3 (fr) 2016-05-09 2024-05-29 Aktiebolaget Electrolux Récipient à poussière pour aspirateur
EP3318166A1 (fr) * 2016-11-07 2018-05-09 HILTI Aktiengesellschaft Dispositif de bride pour un dispositif de filtre
USD868405S1 (en) * 2017-02-15 2019-11-26 Miele & Cie. Kg Connection element for vacuum cleaner bag
WO2019232056A1 (fr) * 2018-05-29 2019-12-05 Gentherm Medical, Llc Ensemble orifice d'entrée monobloc
USD1032978S1 (en) * 2021-04-20 2024-06-25 Vacuum Technologies, Llc Aperture cover
USD1019034S1 (en) * 2022-01-07 2024-03-19 Haowen Mo Vacuum cleaner dust storage bag
USD975391S1 (en) * 2022-04-28 2023-01-10 Shenzhen Kuajingjianbing E-Commerce Co., Ltd Vacuum bag cover

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Publication number Priority date Publication date Assignee Title
NL7305715A (fr) * 1972-04-24 1973-10-26
EP0009471A1 (fr) * 1978-09-25 1980-04-02 Aktiebolaget Electrolux Sac à poussière pour un aspirateur
US4861357A (en) * 1988-05-10 1989-08-29 Gavin Thomas W Vacuum cleaner bag collar
EP0510314A1 (fr) * 1991-04-24 1992-10-28 Vorwerk & Co. Interholding GmbH Sac à poussières
EP0510309A1 (fr) * 1991-04-24 1992-10-28 Vorwerk & Co. Interholding GmbH Sac à poussières

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Patent Citations (5)

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Publication number Priority date Publication date Assignee Title
NL7305715A (fr) * 1972-04-24 1973-10-26
EP0009471A1 (fr) * 1978-09-25 1980-04-02 Aktiebolaget Electrolux Sac à poussière pour un aspirateur
US4861357A (en) * 1988-05-10 1989-08-29 Gavin Thomas W Vacuum cleaner bag collar
EP0510314A1 (fr) * 1991-04-24 1992-10-28 Vorwerk & Co. Interholding GmbH Sac à poussières
EP0510309A1 (fr) * 1991-04-24 1992-10-28 Vorwerk & Co. Interholding GmbH Sac à poussières

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103876686A (zh) * 2012-12-21 2014-06-25 Seb公司 吸尘器及其吸尘器袋

Also Published As

Publication number Publication date
DE59309717D1 (de) 1999-09-09
ZA938174B (en) 1994-06-06
JPH06339446A (ja) 1994-12-13
CZ224593A3 (en) 1994-05-18
HU9303120D0 (en) 1994-03-28
NZ250095A (en) 1995-12-21
SK120593A3 (en) 1994-06-08
SI9300577A (en) 1994-06-30
PL300919A1 (en) 1994-05-16
US5468271A (en) 1995-11-21
SK282519B6 (sk) 2002-10-08
AU669006B2 (en) 1996-05-23
ES2134234T3 (es) 1999-10-01
HUT66237A (en) 1994-10-28
AU5031593A (en) 1994-05-19
EP0596382B1 (fr) 1999-08-04
HU212079B (en) 1996-02-28
PL172536B1 (pl) 1997-10-31
CA2102158A1 (fr) 1994-05-04
ATE182765T1 (de) 1999-08-15
DE4237035A1 (de) 1994-05-05
MX9306823A (es) 1995-01-31
CZ285576B6 (cs) 1999-09-15

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