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

Claim 15:
16. The tool as claimed in claim 14, wherein the petals (27) have the shape of a truncated angular sector so that the width of the petal as a function of the distance x from the far end of the petal is expressed as:

b(x)=a0+a1x 

so that at any distance x, a 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
        
      
      )