Ex parte YOKOYAMA et al. - Page 8




          Appeal No. 1998-2484                                       Page 8            
          Application No. 08/212,819                                                   


           holes.  Therefore, as shown in Fig. 3, a ring of liquid                     
           gasket is      formed outside the O ring, preventing water                  
           from entering       the flange, which in turn prevents the                  
           corrosion of                                                                
                the flange.  The air-tight sealing is examined prior to                
                filling the liquid gasket, so this examination becomes                 
                more reliable.                                                         
                     The removed bolt can be inserted and tightened                    
                after filling the liquid gasket.  If the hole 9 is                     
                used, the hole is plugged.  If the liquid gasket                       
                material is a rubber vulcanized at a normal                            
           temperature, it will be cured in a few days after having                    
           been filled, so the plugging will not be necessary.  Groove                 
           8 may be       made in both flanges 4 and 8, and the same                   
           effect will                                                                 
                be produced by it.                                                     
                     Fig. 4 shows a variant form of the present                        
           invention.     When insulating spacer 12 is installed between               
           the            flanges, the width of the groove 8 is made                   
           larger than                                                                 
                the diameter of the buried metal element 13 to prevent                 
                the corrosion of buried metal element 13 by making the                 
                front face of the buried metal element tightly contact                 
                with the liquid gasket 6.  In the embodiment example of                
                Fig. 4, the corrosion of the buried metal element is                   
                     prevented as well as that of the flange.                          
          Notwithstanding the appellants statement to the contrary                     
          (brief, page 7), that JP’313 does not disclose a liquid                      
          packing, we note that appellants’ specification (page 1), in a               
          description of JP’313 sets forth                                             











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