[go: up one dir, main page]

US20080067001A1 - Sound-Absorbing Lining for Motor Vehicles, Particularly Engine Hood Lining - Google Patents

Sound-Absorbing Lining for Motor Vehicles, Particularly Engine Hood Lining Download PDF

Info

Publication number
US20080067001A1
US20080067001A1 US11/884,090 US88409006A US2008067001A1 US 20080067001 A1 US20080067001 A1 US 20080067001A1 US 88409006 A US88409006 A US 88409006A US 2008067001 A1 US2008067001 A1 US 2008067001A1
Authority
US
United States
Prior art keywords
foam material
coating
lining according
lining
woven fabric
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.)
Abandoned
Application number
US11/884,090
Other languages
English (en)
Inventor
Andreas Sviridenko
Hans-Rudolf Czerny
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.)
Carcoustics Techconsult GmbH
Original Assignee
Individual
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 Individual filed Critical Individual
Assigned to CARCOUSTICS TECHCONSULT GMBH reassignment CARCOUSTICS TECHCONSULT GMBH ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: CZERNY, HANS-RUDOLF, SVIRIDENKO, ANDREAS
Publication of US20080067001A1 publication Critical patent/US20080067001A1/en
Abandoned legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R13/00—Elements for body-finishing, identifying, or decorating; Arrangements or adaptations for advertising purposes
    • B60R13/08—Insulating elements, e.g. for sound insulation
    • B60R13/0838—Insulating elements, e.g. for sound insulation for engine compartments

Definitions

  • the invention relates to a self-supporting lining that absorbs airborne sound, particularly in the form of a face wall lining for the engine hood or on the engine side, having at least one layer of open-cell foam material, which layer is laminated at least on one side to a non-woven fabric cover, whereby an open-pore coating that connects the non-woven fabric cover with the foam material layer is disposed at least on one side of the foam material layer.
  • the sound-absorbing panel described there consists of a foam material layer of polyurethane resin foam, phenolic resin foam, or melamine resin foam, which is laminated on both sides to thin cover layers.
  • the cover layers consist, in particular, of mineral fiber or glass fiber non-woven fabrics. They are supposed to protect the foam material layer, which can easily be damaged mechanically, from damage, and to absorb the tensile and shear forces that occur in the sandwich structure, because of its inherent weight and under stress on the sound-absorbing panel, and thereby to bring about sufficient rigidity and inherent carrying strength of the sound-absorbing panel.
  • lamination of the non-woven fabric cover onto the foam material layer usually takes place by means of application of a spray adhesive, by means of binders that are water soluble or contain solvents, or also by means of introduction of a plastic film that melts under the effect of heat and connects the layers when it hardens again.
  • the present invention is therefore based on the task of making available a lining of the type stated initially, which can be produced free of mineral fibers, but nevertheless demonstrates improved shape stability at temperatures in the minus degree range as well as at high temperatures up to +180° C., particularly also in a humid environment.
  • This task is accomplished, according to the invention, by means of a lining having the characteristics of claim 1 .
  • the sound-absorbing lining according to the invention has at least one open-cell foam material layer that is laminated at least on one side to a non-woven fabric cover, whereby an open-pore coating that connects the non-woven fabric cover with the foam material layer is applied at least on one side of the foam material layer; this coating is formed from a powder mixture that is composed of at least one thermoplastic component, at least one cross-linking component, and mineral micro-bodies.
  • the lining according to the invention is particularly suitable as a sound-absorbing part in the engine compartment of a motor vehicle. It is characterized by excellent shape stability at temperatures up to approximately 180° C., in the alternating climate test, whereby it is possible to do without the use of mineral fibers and glass fibers in their production. Also, the water absorption of the lining according to the invention is significantly reduced as compared with conventional sound-absorbing parts of this type.
  • the lining according to the invention can be heat-shaped or hot-pressed in excellent manner during its production, so that even difficult geometries with small radii of curvature can be implemented.
  • the foam material layer of the lining according to the invention is preferably formed from duroplastic foam material, particularly preferably from melamine resin foam material.
  • duroplastic foam material particularly preferably from melamine resin foam material.
  • Melamine foam resin demonstrates excellent temperature resistance and is considered to be very flame-resistant.
  • the non-woven fabric cover or non-woven fabric covers of the lining according to the invention are preferably formed from polyester fibers.
  • Polyester fiber non-woven fabric has a high temperature resistance and is furthermore resistant to rotting.
  • the temperature stability and shape stability of the lining according to the invention is particularly good if the open-pore coating that connects the non-woven fabric cover with the foam material layer is composed of 15 to 45 wt.-% thermoplastic plastic, 8 to 25 wt.-% duroplastic binder, and 50 to 70 wt.-% mineral micro-bodies.
  • thermoplastic component or components of the coating preferably consist of plastic or plastics from the group of polyolefins, copolyesters, or copolyamides. It is advantageous, in particular, to use mixtures of these thermoplastic plastics in the coating.
  • the cross-linking component of the coating is preferably formed from phenolic resin, melamine resin and/or epoxy resin. Very good shape stability was achieved, in particular, when the coating contains 2 to 6 wt.-% phenolic resin binder and 8 to 15 wt.-% melamine resin binder.
  • the mineral micro-bodies of the coating are preferably formed from hollow mineral micro-bodies. This not only has an advantageous effect with regard to a low weight per surface area of the coating, but also improves the sound absorption of the lining according to the invention.
  • the open-pore coating can be applied on one side, or preferably on both sides of the foam material layer. According to an advantageous embodiment of the lining according to the invention, the coating can also be applied between two or more thin foam material layers. In this way, the shape stability of the lining can be further improved.
  • the coating can be applied as a powder mixture, at first, onto the foam material layer, or, alternatively, also onto the side of the non-woven fabric cover that faces the foam material layer. After the thermal lamination process has been concluded, the coating connects the non-woven fabric cover, in each instance, with the foam material layer.
  • Another advantageous embodiment of the lining according to the invention is characterized in that the foam material layer and/or the non-woven fabric cover/non-woven fabric covers are made to be hydrophobic and/or oleophobic. In this way, the liquid absorption of the lining can be minimized, to a great extent.
  • FIG. 1 a schematic cross-sectional view of a lining according to the invention, in a first exemplary embodiment
  • FIG. 2 a schematic cross-sectional view of a lining according to the invention, in a second exemplary embodiment
  • FIG. 3 a schematic cross-sectional view of a lining according to the invention, in a third exemplary embodiment.
  • FIG. 4 a schematic representation of a system for the production of a lining according to the invention.
  • the linings 1 , 1 ′, 1 ′′ shown in the drawing are sound-absorbing lining parts for the engine compartment of a motor vehicle, e.g. engine hood linings or face wall linings that absorb airborne sound.
  • the linings 1 , 1 ′ shown in FIGS. 1 and 2 are formed from an open-cell foam material layer 2 , in each instance, which is laminated to an air-permeable non-woven fabric cover 3 , 4 on both sides.
  • the foam material layer 2 has an average thickness in the range of approximately 8 to 30 mm, and preferably consists of duroplastic foam material.
  • the foam material layer is relatively light; its volumetric weight in the unpressed state lies in the range of about 7 to 12 kg/m 3 .
  • it consists of melamine resin foam, particularly of a melamine resin foam that has been adjusted to be hydrophobic and/or oleophobic.
  • the non-woven fabric covers 3 , 4 are formed from polyester fibers or from mixtures containing polyester fibers. In this connection, these can be, in particular, needled non-woven fabrics, spun-bonded non-woven fabrics, polyester non-woven fabrics bonded with acrylate binder, for example, and/or mixed-fiber non-woven fabrics, such as polyester/viscose non-woven fabrics.
  • the weight per surface area of the non-woven fabric cover 3 , 4 in each instance, lies in the range of approximately 30 to 160 g/m 2 .
  • the non-woven fabric covers 3 , 4 can made to be hydrophobic and/or oleophobic.
  • a coating 5 that connects the non-woven fabric cover 3 with the foam material layer 2 is disposed on one side of the foam material layer 2 .
  • the coating 5 is formed from a powder mixture that is composed of at least one thermoplastic component, at least one cross-linking component, and mineral (inorganic) micro-bodies.
  • the thermoplastic component is, for example, polyethylene, particularly high-density polyethylene (HD-PE).
  • HD-PE high-density polyethylene
  • another plastic from the group of polyolefins, copolyesters, or copolyamides can be used in the powder mixture as the thermoplastic component.
  • the MFI value of the thermoplastic component of the powder mixture lies in the range of about 18 to 22 g/10 min (190°/2.16 kg), particularly in the range of 18 to 20 g/10 min (190°/2.16 kg).
  • the cross-linking component of the coating 5 is formed, for example, from phenolic resin, phenolic formaldehyde resin, melamine resin, melamine formaldehyde resin, melamine phenolic resin, and/or epoxy resin.
  • the mineral micro-bodies of the coating 5 preferably consist essentially of hollow mineral micro-bodies.
  • the grain size of the micro-bodies lies in the range of 0 to 400 ⁇ m, preferably in the range of 0 to 300 ⁇ m.
  • the powder mixture on which the open-pore coating 5 is based is preferably composed of 20 to 30 wt.-% thermoplastic plastic, 10 to 20 wt.-% duroplastic binder, and 55 to 65 wt.-% mineral micro-bodies, whereby the duroplastic binder can also comprise several components.
  • a suitable powder mixture could, for example, have the following composition:
  • the melting range of such a powder mixture lies approximately in the range of 100 to 130° C.
  • the lining part 1 ′ shown in FIG. 2 differs from the exemplary embodiment according to FIG. 1 essentially only in that the coating 5 is applied or disposed on both sides of the foam material layer 2 .
  • the coating 5 , 5 . 1 , 5 . 2 has a weight per surface area, in each instance, in the range of 50 to 200 g/m 2 .
  • Both lining parts 1 , 1 ′ are free of artificial mineral fibers.
  • FIG. 3 shows another exemplary embodiment of the lining according to the invention.
  • the lining 1 ′′ is formed from two relatively thin open-cell foam material layers 2 . 1 and 2 . 2 .
  • the foam material layers 2 . 1 , 2 . 1 are laminated to an air-permeable non-woven fabric cover 3 , 4 , in each instance.
  • the foam material layers 2 . 1 , 2 . 2 and the non-woven fabric covers 3 , 4 correspond, with regard to their material, to the exemplary embodiment according to FIG. 1 .
  • the non-woven fabric covers 3 , 4 are connected with the related foam material layer 2 . 1 or 2 . 2 by way of a coating 5 . 1 , 5 .
  • FIG. 3 it can be seen that a corresponding coating 5 . 3 is also applied between the foam material layers 2 . 1 and 2 . 2 .
  • FIG. 4 schematically shows a system for the production of a sound-absorbing lining part 1 , 1 ′ according to the invention.
  • a web 9 of open-cell, duroplastic foam material and an upper web 10 as well as a lower web 11 of a non-woven fabric as the non-woven fabric cover are unwound from supply rollers 6 , 7 , 8 .
  • the duroplastic foam material that is used can be impregnated with a heat-hardening, not yet cross-linked binder such as melamine resin or phenolic resin, for example.
  • the foam material web 9 and the lower non-woven fabric web 11 each have a sprinkler head 12 , 13 or the like for applying the powder mixture indicated above assigned to them.
  • At least one heating device (e.g. a heat radiator) 14 , 15 for starting to melt or melting the powder mixture is disposed downstream from the sprinkler heads 12 , 13 .
  • the webs 9 , 10 , 11 are brought together and pressed against one another by means of a roller gap of adjacent contact pressure rollers 16 , 17 .
  • the foam material web 9 laminated to non-woven fabric covers 10 , 11 in this manner, is subsequently passed to a heated shape-pressing die 18 , which comprises an upper die 19 and a lower die 20 , which can be moved towards and away from one another in accordance with the double arrow 21 .
  • a cutting device 22 . 1 , 22 . 2 for producing suitable cutouts 23 precedes the shape-pressing die 18 .
  • the shape-pressing die 18 itself can also be provided with a cutting device.
  • the cut-out 23 in each instance, of the foam material web 9 laminated to the non-woven fabric covers 10 , 11 , is permanently deformed in the heated shape-pressing die 18 , in accordance with the desired contour of the required lining part 1 , 1 ′, whereby the edge of the shaped part, in each instance, is pressed (embossed) so strongly that the foam material layer 2 is finally compacted into a compact circumferential edge strip 24 (cf. FIGS. 1 and 2 ).

Landscapes

  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Laminated Bodies (AREA)
  • Vehicle Interior And Exterior Ornaments, Soundproofing, And Insulation (AREA)
  • Superstructure Of Vehicle (AREA)
  • Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
US11/884,090 2005-02-10 2006-02-08 Sound-Absorbing Lining for Motor Vehicles, Particularly Engine Hood Lining Abandoned US20080067001A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102005006234A DE102005006234B4 (de) 2005-02-10 2005-02-10 Selbsttragende, Luftschall absorbierende Motorraumverkleidung für Kraftfahrzeuge
DE102005006234.2 2005-02-10
PCT/EP2006/001099 WO2006084677A1 (de) 2005-02-10 2006-02-08 Schallabsorbierende verkleidung für kraftfahrzeuge, insbesondere motorhaubenverkleidung

Publications (1)

Publication Number Publication Date
US20080067001A1 true US20080067001A1 (en) 2008-03-20

Family

ID=36407899

Family Applications (1)

Application Number Title Priority Date Filing Date
US11/884,090 Abandoned US20080067001A1 (en) 2005-02-10 2006-02-08 Sound-Absorbing Lining for Motor Vehicles, Particularly Engine Hood Lining

Country Status (6)

Country Link
US (1) US20080067001A1 (de)
EP (1) EP1846266B1 (de)
AT (1) ATE449706T1 (de)
DE (2) DE102005006234B4 (de)
MX (1) MX2007009627A (de)
WO (1) WO2006084677A1 (de)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120017565A1 (en) * 2010-07-22 2012-01-26 Gerd Gaiser Exhaust system
US20120145479A1 (en) * 2009-08-19 2012-06-14 Yukihiro Nishikawa Sound absorbing body
US20140050886A1 (en) * 2011-03-23 2014-02-20 Autoneum Management Ag Moulded multilayer lining for heat and sound insulation
US20150034414A1 (en) * 2012-07-04 2015-02-05 Nishikawa Rubber Co., Ltd. Sound insulation material
US20160063985A1 (en) * 2014-09-01 2016-03-03 Isolite Gmbh Sound absorbers
US20180072026A1 (en) * 2015-03-19 2018-03-15 Cera Aps Thermoformed sound protection element for a motor vehicle
US20210268767A1 (en) * 2018-08-27 2021-09-02 Arianegroup Sas Acoustic attenuation panel with improved performances in low and medium frequencies
CN115023372A (zh) * 2020-01-28 2022-09-06 泰佛产品服务与创新公司 用于机动车辆的声学保护系统
US20230022931A1 (en) * 2019-12-13 2023-01-26 Zf Airbag Germany Gmbh Gas generator

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202007007323U1 (de) 2007-05-23 2007-08-16 Gummi-Welz Gmbh U. Co. Kg Gummi-Kunststofftechnik-Schaumstoffe Isolierelement mit Sandwich-Aufbau
DE102008029565A1 (de) * 2008-06-21 2009-12-24 Happich Fahrzeug- Und Industrieteile Gmbh Selbsttragendes, thermisch und akustisch isolierendes Bauteil, insbesondere für Fahrzeuge und Verfahren zu seiner Herstellung
DE102008030709A1 (de) 2008-06-27 2009-12-31 Elringklinger Ag Mehrlagiges Abschirmteil
DE102008030708B4 (de) 2008-06-27 2015-11-26 Elringklinger Ag Mehrlagiger schalldämmender Hitzeschild
DE102008035958B4 (de) 2008-07-31 2014-07-10 Elringklinger Ag Mehrlagiges Abschirmteil
DE202009010969U1 (de) * 2009-07-16 2010-12-02 Odenwald-Chemie Gmbh Schalldämpfelement
DE102010009611B4 (de) 2010-02-05 2018-07-26 Fahrzeugbau Meier Gmbh Reisemobil sowie Schottbauteil für ein Reisemobil
DE202013003984U1 (de) * 2013-04-27 2014-08-04 GM Global Technology Operations LLC (n. d. Ges. d. Staates Delaware) Schallisolierteil für ein Kraftfahrzeug

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5049439A (en) * 1990-05-25 1991-09-17 Fibre Converters, Inc. Thermoformable article
US5540976A (en) * 1995-01-11 1996-07-30 Kimberly-Clark Corporation Nonwoven laminate with cross directional stretch
US5744763A (en) * 1994-11-01 1998-04-28 Toyoda Gosei Co., Ltd. Soundproofing insulator
US20040115456A1 (en) * 2002-10-28 2004-06-17 Kanderski Monina Dadap Hot melt adhesive composition based on a random copolymer of isotactic polypropylene and a secondary polymer
US20050142326A1 (en) * 2002-07-01 2005-06-30 Czerny Hans R. Soundproofing floor covering and method for the production thereof

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2426793B2 (de) * 1974-06-01 1978-11-16 Dynamit Nobel Ag, 5210 Troisdorf Belag mit schalldämmender Wirkung
SE7601561L (sv) * 1975-02-12 1976-08-13 Bury & Masco Ind Ljudisolerade material
DE8527746U1 (de) * 1985-09-28 1989-07-20 C.A. Greiner und Söhne GmbH & Co KG, 7440 Nürtingen Selbsttragende Schalldämmplatte
JP3651840B2 (ja) * 2000-07-11 2005-05-25 エスケー化研株式会社 吸音板およびその製造方法
DE10239631A1 (de) * 2002-08-23 2004-03-04 Carcoustics Tech Center Gmbh Isolierbauteil zur Wärme- und/oder Schallisolierung mit feuerhemmender Beschichtung
DE10312817A1 (de) * 2003-03-22 2004-10-07 Carl Freudenberg Kg Abdeckschicht für Motorraumauskleidung

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5049439A (en) * 1990-05-25 1991-09-17 Fibre Converters, Inc. Thermoformable article
US5744763A (en) * 1994-11-01 1998-04-28 Toyoda Gosei Co., Ltd. Soundproofing insulator
US5540976A (en) * 1995-01-11 1996-07-30 Kimberly-Clark Corporation Nonwoven laminate with cross directional stretch
US20050142326A1 (en) * 2002-07-01 2005-06-30 Czerny Hans R. Soundproofing floor covering and method for the production thereof
US20040115456A1 (en) * 2002-10-28 2004-06-17 Kanderski Monina Dadap Hot melt adhesive composition based on a random copolymer of isotactic polypropylene and a secondary polymer

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120145479A1 (en) * 2009-08-19 2012-06-14 Yukihiro Nishikawa Sound absorbing body
US8443935B2 (en) * 2009-08-19 2013-05-21 Yukihiro Nishikawa Sound absorbing body
US8783414B2 (en) * 2010-07-22 2014-07-22 Eberspächer Exhaust Technology GmbH & Co. KG Exhaust system
US20120017565A1 (en) * 2010-07-22 2012-01-26 Gerd Gaiser Exhaust system
US9586380B2 (en) * 2011-03-23 2017-03-07 Autoneum Management Ag Moulded multilayer lining for heat and sound insulation
US20140050886A1 (en) * 2011-03-23 2014-02-20 Autoneum Management Ag Moulded multilayer lining for heat and sound insulation
US20150034414A1 (en) * 2012-07-04 2015-02-05 Nishikawa Rubber Co., Ltd. Sound insulation material
US20160063985A1 (en) * 2014-09-01 2016-03-03 Isolite Gmbh Sound absorbers
US20180072026A1 (en) * 2015-03-19 2018-03-15 Cera Aps Thermoformed sound protection element for a motor vehicle
US20210268767A1 (en) * 2018-08-27 2021-09-02 Arianegroup Sas Acoustic attenuation panel with improved performances in low and medium frequencies
US11987038B2 (en) * 2018-08-27 2024-05-21 Arianegroup Sas Acoustic attenuation panel with improved performances in low and medium frequencies
US20230022931A1 (en) * 2019-12-13 2023-01-26 Zf Airbag Germany Gmbh Gas generator
US12139095B2 (en) * 2019-12-13 2024-11-12 Zf Airbag Germany Gmbh Gas generator
CN115023372A (zh) * 2020-01-28 2022-09-06 泰佛产品服务与创新公司 用于机动车辆的声学保护系统
US20230053179A1 (en) * 2020-01-28 2023-02-16 Treves Products, Services & Innovation Acoustic protection system for a motor vehicle

Also Published As

Publication number Publication date
DE102005006234A1 (de) 2006-08-24
ATE449706T1 (de) 2009-12-15
DE102005006234B4 (de) 2007-07-19
MX2007009627A (es) 2008-10-24
EP1846266B1 (de) 2009-11-25
WO2006084677A1 (de) 2006-08-17
EP1846266A1 (de) 2007-10-24
DE502006005451D1 (de) 2010-01-07

Similar Documents

Publication Publication Date Title
US20080067001A1 (en) Sound-Absorbing Lining for Motor Vehicles, Particularly Engine Hood Lining
KR890002973B1 (ko) 열성형체 복합체(熱成型性 複合體)
US6720068B1 (en) Sound absorbent thin-layer laminate
RU2582503C2 (ru) Способ получения формованной многослойной облицовки
EP2503040A1 (de) Geformte mehrschichtige Verkleidung
US20150232044A1 (en) Latex impregnated fibrous acoustic insulator
JPS623438B2 (de)
DE10143167A1 (de) Wärme- und schalldämmende Verkleidung für den Motorraum von Kraftfahrzeugen
US20180106191A1 (en) Light Weight Engine Mounted Trim Part
US20050191921A1 (en) Multidensity liner/insulator having reinforcing ribs
KR100588757B1 (ko) 자동차용 헤드라이너의 폴리에스터 섬유 기재 및 그 제조방법
KR20170034003A (ko) 폐섬유를 이용한 자동차용 경량 흡음 내장재 및 이의 제조방법
CN111757966B (zh) 复合声学层
JP2002046545A (ja) 車両用成形天井材及びその製造方法
KR101655615B1 (ko) 자동차용 저중량 흡음형 대쉬 패드
KR102372331B1 (ko) 차량 엔진용 언더커버의 제조방법
JPH06903A (ja) 深絞り可能な軽量防音材
KR20190055983A (ko) 흡음성능이 개선된 차량용 헤드라이너 및 그 제조방법
JPH04223149A (ja) 深絞り可能な軽量防音材
JPH04223147A (ja) 深絞り可能な軽量防音材
JPS591793Y2 (ja) 車両用防音断熱材
AU675143B2 (en) A lining part for motor vehicles and a method for its production
JPH04223146A (ja) 深絞り可能な軽量防音材
JPS5938893B2 (ja) 防水性の秀れた防音材の製造方法
JPH07205352A (ja) ダンボールおよび車両用内装材

Legal Events

Date Code Title Description
AS Assignment

Owner name: CARCOUSTICS TECHCONSULT GMBH, GERMANY

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:SVIRIDENKO, ANDREAS;CZERNY, HANS-RUDOLF;REEL/FRAME:019788/0886

Effective date: 20070816

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION