Patent ID: 11897806
Assignee: SCHOTT AG
Field: Other special machines (Mechanical engineering)
Classification: CPC C | IPC C

Claim 8:
9. A thin glass ribbon, comprising:
a thickness of less than 250 μm;
a thickness (Duse) in a center of the thin glass ribbon; and
edges that are rounded off and have a fire-polished surface, wherein the edges have a maximum thickness (DB), wherein, D
    B
   
   ≤
   
    2
    ·
    
     
      
       
        
         D
         
          u
          ⁢
          s
          ⁢
          e
         
        
        ·
        200
       
       ⁢
       μ
       ⁢
       m
      
      π
     
    
   
  
  ,, and
wherein π is the mathematical constant number π,
wherein the edges comprise a first border and a second border and each of the first and second borders are thicker than the thickness (Duse) in the center of the thin glass ribbon, and
wherein the thin glass ribbon is coiled into a roll that reduces the permanent stress of the first and second borders.