Patent ID: 11927504
Assignee: ZHENGZHOU TOBACCO RESEARCH INSTITUTE OF CNTC
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 5:
6. The non-destructive determination method of a cigarette packet's seal according to claim 3, wherein:
in step (6, the above is based on the molecular kinetic theory:, p
   t
  
  =
  
   
    p
    e
   
   +
   
    
     (
     
      
       p
       
        t
        ⁢
        0
       
      
      -
      
       p
       e
      
     
     )
    
    ·
    
     exp
     [
     
      
       -
       
        
         
          
           K
           B
          
          ⁢
          T
         
        
        
         
          2
          ⁢
          
           π
           ·
           m
          
         
        
       
      
      ·
      A
      ·
      
       
        p
        
         t
         ⁢
         0
        
       
       
        
         (
         
          
           p
           
            t
            ⁢
            0
           
          
          -
          
           p
           e
          
         
         )
        
        ·
        
         V
         1
        
       
      
      ·
      t
     
     ]
    
   
  
 

A: effective leakage area of cigarette packet (m2), KB: Boltzmann constant (1.38*10−23 J/K), m: molecular mass (29*1.67*10−27 kg); V1: external volume of cigarette packet (m3); Pe: final pressure of the airtight chamber (Pa); Pt: measured pressure of the airtight chamber (Pa); Pt0: initial pressure of the airtight chamber (Pa).