Patent ID: 11969848
Assignee: ESSILOR INTERNATIONAL
Field: Machine tools (Mechanical engineering)
Classification: CPC B | IPC B

Claim 14:
15. The tool as claimed in claim 14, wherein the width of the petal (27) as a function of the distance x from the far end of the petal is expressed as:, b
    ⁡
    
      (
      x
      )
    
  
  =
  
    
      
        ∑
        
          i
          =
          0
        
        n
      
      ⁢
      
        
      
      ⁢
      
        
          a
          n
        
        ⁢
        
          x
          n
        
      
    
    =
    
      
        a
        0
      
      +
      
        
          a
          1
        
        ⁢
        x
      
      +
      
        
          a
          2
        
        ⁢
        
          x
          2
        
      
      +
      ⋯
      +
      
        
          a
          n
        
        ⁢
        
          x
          n
        
      
    
  

so that at any distance x, the thickness of the petal is given by the formula:, h
      ⁡
      
        (
        x
        )
      
    
    3
  
  =
  
    
      K
      
        b
        ⁡
        
          (
          x
          )
        
      
    
    ⁢
    
      (
      
        
          
            
              a
              0
            
            ⁢
            
              x
              2
            
          
          2
        
        +
        
          
            
              a
              1
            
            ⁢
            
              x
              3
            
          
          6
        
        +
        ⋯
        +
        
          
            
              a
              n
            
            ⁢
            
              x
              
                n
                +
                2
              
            
          
          
            
              (
              
                n
                +
                1
              
              )
            
            ⁢
            
              (
              
                n
                +
                2
              
              )
            
          
        
      
      )