ES2098789T3 - Pelicula o capa anti copia. - Google Patents

Pelicula o capa anti copia.

Info

Publication number
ES2098789T3
ES2098789T3 ES93923480T ES93923480T ES2098789T3 ES 2098789 T3 ES2098789 T3 ES 2098789T3 ES 93923480 T ES93923480 T ES 93923480T ES 93923480 T ES93923480 T ES 93923480T ES 2098789 T3 ES2098789 T3 ES 2098789T3
Authority
ES
Spain
Prior art keywords
film
pct
layer
transparent
anticopying
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
Application number
ES93923480T
Other languages
English (en)
Inventor
Helmut Steininger
Peter Heilmann
Peter Hewkin
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.)
Emtec Magnetics GmbH
Original Assignee
BASF Magnetics 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 BASF Magnetics GmbH filed Critical BASF Magnetics GmbH
Application granted granted Critical
Publication of ES2098789T3 publication Critical patent/ES2098789T3/es
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41MPRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M3/00Printing processes to produce particular kinds of printed work, e.g. patterns
    • B41M3/14Security printing
    • B41M3/148Transitory images, i.e. images only visible from certain viewing angles
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B42BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42DBOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/20Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof characterised by a particular use or purpose
    • B42D25/29Securities; Bank notes
    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03CPHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES; PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR, STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY
    • G03C5/00Photographic processes or agents therefor; Regeneration of such processing agents
    • G03C5/08Photoprinting; Processes and means for preventing photoprinting
    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03GELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G21/00Arrangements not provided for by groups G03G13/00 - G03G19/00, e.g. cleaning, elimination of residual charge
    • G03G21/04Preventing copies being made of an original
    • G03G21/043Preventing copies being made of an original by using an original which is not reproducible or only reproducible with a different appearence, e.g. originals with a photochromic layer or a colour background
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09FDISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F3/00Labels, tag tickets, or similar identification or indication means; Seals; Postage or like stamps
    • G09F3/02Forms or constructions
    • G09F3/0291Labels or tickets undergoing a change under particular conditions, e.g. heat, radiation, passage of time
    • G09F3/0292Labels or tickets undergoing a change under particular conditions, e.g. heat, radiation, passage of time tamper indicating labels
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10STECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S283/00Printed matter
    • Y10S283/902Anti-photocopy
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10STECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S428/00Stock material or miscellaneous articles
    • Y10S428/913Material designed to be responsive to temperature, light, moisture
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10STECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S428/00Stock material or miscellaneous articles
    • Y10S428/916Fraud or tamper detecting
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00Stock material or miscellaneous articles
    • Y10T428/24Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24355Continuous and nonuniform or irregular surface on layer or component [e.g., roofing, etc.]
    • Y10T428/24372Particulate matter
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00Stock material or miscellaneous articles
    • Y10T428/24Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24355Continuous and nonuniform or irregular surface on layer or component [e.g., roofing, etc.]
    • Y10T428/24372Particulate matter
    • Y10T428/24413Metal or metal compound
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00Stock material or miscellaneous articles
    • Y10T428/24Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24479Structurally defined web or sheet [e.g., overall dimension, etc.] including variation in thickness
    • Y10T428/24521Structurally defined web or sheet [e.g., overall dimension, etc.] including variation in thickness with component conforming to contour of nonplanar surface
    • Y10T428/24537Parallel ribs and/or grooves
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00Stock material or miscellaneous articles
    • Y10T428/24Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24479Structurally defined web or sheet [e.g., overall dimension, etc.] including variation in thickness
    • Y10T428/2457Parallel ribs and/or grooves
    • Y10T428/24579Parallel ribs and/or grooves with particulate matter
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00Stock material or miscellaneous articles
    • Y10T428/24Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24479Structurally defined web or sheet [e.g., overall dimension, etc.] including variation in thickness
    • Y10T428/24612Composite web or sheet
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00Stock material or miscellaneous articles
    • Y10T428/24Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24479Structurally defined web or sheet [e.g., overall dimension, etc.] including variation in thickness
    • Y10T428/24612Composite web or sheet
    • Y10T428/2462Composite web or sheet with partial filling of valleys on outer surface
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00Stock material or miscellaneous articles
    • Y10T428/24Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24802Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.]
    • Y10T428/24893Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.] including particulate material
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00Stock material or miscellaneous articles
    • Y10T428/24Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24802Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.]
    • Y10T428/24893Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.] including particulate material
    • Y10T428/24901Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.] including particulate material including coloring matter

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Business, Economics & Management (AREA)
  • Accounting & Taxation (AREA)
  • Finance (AREA)
  • Laminated Bodies (AREA)
  • Non-Silver Salt Photosensitive Materials And Non-Silver Salt Photography (AREA)
  • Prostheses (AREA)
  • Materials For Medical Uses (AREA)
  • Credit Cards Or The Like (AREA)

Abstract

UNA CAPA O PELICULA ANTICOPIADORA ESTA COMPUESTA DE UNA PELICULA O CAPA DE MATERIAL TRANSPARENTE CON UNA PLURALIDAD DE ZONAS AL MENOS PARCIALMENTE NO TRANSPARENTES, ESPACIADAS MUTUAMENTE, CUYOS PLANOS ESTAN DISPUESTOS EN APROXIMADAMENTE LA MISMA POSICION CON RESPECTO A LA SUPERFICIE DE LA PELICULA O DE LA CAPA, DE TAL MODO QUE A PARTIR DE UN ANGULO DE VISION PREDETERMINADO LA SUPERFICIE DE LA PELICULA ANTICOPIADORA ES SUSTANCIALMENTE TRANSPARENTE. ESTAS ZONAS SON AL MENOS PARCIALMENTE FABRICADAS DE UN MATERIAL FOTOSENSITIVO CONVERTIDO MEDIANTE EXPOSICION CON RADIACION A MATERIAL REFLECTANTE O NO TRANSPARENTE. LAS ESTRIAS O RANURAS EN DONDE ESTA LOCALIZADO EL MATERIAL FOTOSENSITIVO PUEDEN ESTAR TAMBIEN PROVISTAS EN EL MATERIAL PLASTICO TRANSPARENTE.
ES93923480T 1992-10-29 1993-10-16 Pelicula o capa anti copia. Expired - Lifetime ES2098789T3 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE4236563A DE4236563A1 (de) 1992-10-29 1992-10-29 Anti-Kopier-Film oder -Schicht

Publications (1)

Publication Number Publication Date
ES2098789T3 true ES2098789T3 (es) 1997-05-01

Family

ID=6471670

Family Applications (1)

Application Number Title Priority Date Filing Date
ES93923480T Expired - Lifetime ES2098789T3 (es) 1992-10-29 1993-10-16 Pelicula o capa anti copia.

Country Status (14)

Country Link
US (1) US5795643A (es)
EP (1) EP0670786B1 (es)
JP (1) JP3386076B2 (es)
KR (1) KR100268157B1 (es)
CN (1) CN1044349C (es)
AT (1) ATE149121T1 (es)
BR (1) BR9307341A (es)
DE (2) DE4236563A1 (es)
DK (1) DK0670786T3 (es)
ES (1) ES2098789T3 (es)
GR (1) GR3023340T3 (es)
RU (1) RU2101187C1 (es)
WO (1) WO1994009990A1 (es)
ZA (1) ZA938043B (es)

Families Citing this family (36)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4320219A1 (de) * 1993-06-18 1994-12-22 Basf Magnetics Gmbh Antikopierfilm
DE4321685A1 (de) * 1993-06-30 1995-03-23 Basf Magnetics Gmbh Antikopierfilm
US5591527A (en) * 1994-11-02 1997-01-07 Minnesota Mining And Manufacturing Company Optical security articles and methods for making same
DE69632863T2 (de) * 1995-08-01 2004-11-18 Boris Iliich Belousov Banddatenträger, verfahren und vorrichtung zum herstellen desselben
WO1999008161A1 (de) * 1997-08-12 1999-02-18 Emtec Matgnetics Gmbh Anti-kopierfilm für dokumente gegen kopieren derselben in einer kopiereinrichtung mit definiertem öffnungswinkel
DE19749789A1 (de) * 1997-11-11 1999-05-12 Bundesdruckerei Gmbh Sicherheitsmerkmal für ein Wert- oder Sicherheitsdokument mit fraktalem Lamellensystem
DE19932240B4 (de) * 1999-07-10 2005-09-01 Bundesdruckerei Gmbh Optisch variabel darstellbare/versteckbare Sicherheitselemente für Wert- und Sicherheitsdokumente
ES2174673B1 (es) * 1999-07-12 2003-08-01 Vijay Atawane Sistema de seguridad para evitar el fotocopiado de documentos.
US6692030B1 (en) * 2000-07-21 2004-02-17 Verify First Technologies, Inc. Security document with nano-pattern
US6398370B1 (en) 2000-11-15 2002-06-04 3M Innovative Properties Company Light control device
US7694887B2 (en) 2001-12-24 2010-04-13 L-1 Secure Credentialing, Inc. Optically variable personalized indicia for identification documents
US7728048B2 (en) 2002-12-20 2010-06-01 L-1 Secure Credentialing, Inc. Increasing thermal conductivity of host polymer used with laser engraving methods and compositions
CA2470547C (en) 2001-12-24 2008-05-20 Digimarc Id Systems, Llc Laser etched security features for identification documents and methods of making same
WO2003056507A1 (en) 2001-12-24 2003-07-10 Digimarc Id Systems, Llc Systems, compositions, and methods for full color laser engraving of id documents
WO2003056500A1 (en) 2001-12-24 2003-07-10 Digimarc Id Systems, Llc Covert variable information on id documents and methods of making same
WO2003088144A2 (en) 2002-04-09 2003-10-23 Digimarc Id Systems, Llc Image processing techniques for printing identification cards and documents
US7824029B2 (en) 2002-05-10 2010-11-02 L-1 Secure Credentialing, Inc. Identification card printer-assembler for over the counter card issuing
WO2004049242A2 (en) 2002-11-26 2004-06-10 Digimarc Id Systems Systems and methods for managing and detecting fraud in image databases used with identification documents
US7763179B2 (en) 2003-03-21 2010-07-27 Digimarc Corporation Color laser engraving and digital watermarking
DE602004030434D1 (de) 2003-04-16 2011-01-20 L 1 Secure Credentialing Inc Dreidimensionale datenspeicherung
US7625613B2 (en) * 2003-10-15 2009-12-01 Verify First Technologies, Inc. Copy-resistant security paper
US7467873B2 (en) * 2005-10-14 2008-12-23 3M Innovative Properties Company Privacy film
US7326504B2 (en) * 2005-10-14 2008-02-05 3M Innovative Properties Company Imaged anti-copy film
ATE452764T1 (de) * 2006-08-11 2010-01-15 Nat Bank Of Belgium Verstecktes bild
ATE500069T1 (de) * 2008-01-31 2011-03-15 Nat Bank Of Belgium Farbumschaltung
US20100264163A1 (en) * 2008-11-13 2010-10-21 Tevs Nikolai R Product Dispensing Apparatus And Method
BR112012024369A2 (pt) 2010-03-25 2016-05-24 3M Innovative Properties Co matriz de extrusão e método de fabricação de uma camada composta
KR20130018778A (ko) * 2010-03-25 2013-02-25 쓰리엠 이노베이티브 프로퍼티즈 컴파니 복합 층
BR112012025122A2 (pt) * 2010-03-25 2016-06-21 3M Innovative Properties Co camada compósita
GB201117523D0 (en) 2011-10-11 2011-11-23 Rue De Int Ltd Security devices and methods of manufacture thereof
EP2888116B1 (de) * 2012-08-23 2016-09-21 Covestro Deutschland AG Sicherheits- und/oder wertdokument enthaltend ein visuell schaltbares fenster mit einem hologramm
DE102014010313A1 (de) * 2014-07-10 2016-01-14 Giesecke & Devrient Gmbh Folie und Datenträger
FR3040230B1 (fr) * 2015-08-18 2019-04-19 Ingenico Group Decoupeur papier pour imprimante integree a un dispositif electronique et dispositif electronique correspondant.
CN110023793B (zh) * 2016-12-01 2021-10-12 昕诺飞控股有限公司 用于生成光效果的光学元件
KR20220003407A (ko) * 2020-07-01 2022-01-10 엘지디스플레이 주식회사 시야각 제한 장치 및 이를 포함하는 디스플레이 장치
US12014232B2 (en) * 2022-10-07 2024-06-18 Capital One Services, Llc Transaction card with hidden visual features

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4025673A (en) * 1972-04-13 1977-05-24 Reinnagel Richard E Method of forming copy resistant documents by forming an orderly array of fibers extending upward from a surface, coating the fibers and printing the coated fibers and the copy resistant document resulting from said method
US3887742A (en) * 1972-04-13 1975-06-03 Richard E Reinnagel Copy resistant documents
DE2540846A1 (de) * 1975-09-13 1977-03-17 Pelikan Werke Wagner Guenther Schutzueberzug fuer dokumente gegen kopieren
US4791449A (en) * 1986-05-30 1988-12-13 Xerox Corporation System for prevention of unauthorized copying
US5204160A (en) * 1988-08-08 1993-04-20 Minnesota Mining And Manufacturing Company Light-collimating film

Also Published As

Publication number Publication date
DE59305549D1 (de) 1997-04-03
DE4236563A1 (de) 1994-05-05
EP0670786A1 (de) 1995-09-13
DK0670786T3 (da) 1997-05-05
WO1994009990A1 (de) 1994-05-11
CN1087730A (zh) 1994-06-08
BR9307341A (pt) 1999-06-01
ATE149121T1 (de) 1997-03-15
KR100268157B1 (ko) 2000-10-16
RU2101187C1 (ru) 1998-01-10
RU95121657A (ru) 1996-12-27
CN1044349C (zh) 1999-07-28
JP3386076B2 (ja) 2003-03-10
JPH08505821A (ja) 1996-06-25
GR3023340T3 (en) 1997-08-29
ZA938043B (en) 1995-04-28
EP0670786B1 (de) 1997-02-26
US5795643A (en) 1998-08-18

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