| (84) | 
                        Designated Contracting States: | 
                      
                     
                         | 
                        CH DE ES FR GB IT LI NL SE  | 
                      
                   
 
                     
                        | (30) | 
                        Priority: | 
                        03.06.1997 US 867891
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                        | (43) | 
                        Date of publication of application: | 
                      
                     
                         | 
                        29.03.2000 Bulletin 2000/13 | 
                      
                   
 
                     
                        | (73) | 
                        Proprietor: MINNESOTA MINING AND MANUFACTURING COMPANY | 
                      
                     
                         | 
                        St. Paul,
                           Minnesota 55133-3427 (US) | 
                      
                   
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                        | (72) | 
                        Inventors: | 
                      
                     
                         | 
                        
                           
                              - EMSLANDER, Jeffrey, O.
 Saint Paul, MN 55133-3427 (US) 
                              - REGNIER, Diane, L.
 Saint Paul, MN 55133-3427 (US) 
                              - FLEMING, Danny, L.
 Saint Paul, MN 55133-3427 (US) 
                            
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                        | (74) | 
                        Representative: Vossius & Partner  | 
                      
                     
                         | 
                        Siebertstrasse 4 81675 München 81675 München (DE) | 
                      
                   
 
 
                     
                        | (56) | 
                        References cited: : 
                           
                              
                                 EP-A- 0 536 852 GB-A- 2 301 693 US-A- 5 330 812
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                                 FR-A- 2 580 543 US-A- 5 112 423 US-A- 5 585 193
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