Ex parte UNGER et al. - Page 7

          Appeal No. 1998-1805                                                        
          Application No. 08/596,734                                                  

          sealing means, and means for supplying an impregnating medium.              
          The chamber also has a cross-section which over a path from                 
          the inlet to the outlet “narrows and again increases many                   
          times.”   According to the appellants, the narrowings and                   
          increases provide a location-dependent dynamic pressure                     
          component which is superimposed upon the static pressure                    
          component present in the means for applying the impregnating                
          medium, so as the web moves through the chamber it is                       
          repeatedly compressed and released, causing the impregnating                
          medium to be intensely pressed into the pores of the web                    
          (specification, page 9).                                                    
               Long, the primary reference, discloses a web impregnating              
          device that appears to be the type over which the appellants                
          believe their invention to be an improvement (see                           
          specification, page 2).  The difference between the Long                    
          apparatus and that of claim 1 is that Long lacks a plurality                
          of narrowing and expanding portions in the chamber.  In Long,               
          the chamber narrows in from the inlet to the outlet, and                    
          therefore has only one narrowing portion.  It is the                        
          examiner’s view, however, that to modify Long so that it has a              
          plurality of narrowed portions would have been obvious to one               

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