Folded blister package

Abstract

A folded blister sheet where the blisters are placed symmetrically on the sheet, so that each blister is facing the back foil of another blister cavity, enabling the blister cavity to endure many times more pressure than if unfolded, and a method of making the blister sheet. The folding takes place immediately at the end of the packaging process. Packing of drugs in blister packages is facilitated so that the necessary protecting carton may be eliminated and shipping and display of the blisters is easier.

1 . A folding method for blister sheet production, comprising providing a blister sheet with symmetrically placed blister cavities on opposite sides of a center folding line, and folding said blister sheet along the center folding line.  
   
   
       2 . The folding method of  claim 1 , wherein the blister sheet comprises a first and a second column of blisters, and parallel rows of blisters comprising a first row of blisters and a second row of blisters.  
   
   
       3 . The folding method of  claim 2 , wherein the blister sheet is formed of a base foil formed with blister cavities connected to a substantially flat lid foil.  
   
   
       4 . The folding method of  claim 3 , wherein the blisters in the second row are so placed relative to the blisters in the first row that each blister in the first row will cover a blister in the second row when the blister sheet is folded hallway between the first and second rows, wherein when the blister sheet is folded, the flat lid foil covering each blister cavity will correspond to and cover the flat foil of a blister cavity on a corresponding row of blisters.  
   
   
       5 . The folding method of  claim 1 , wherein the center folding line extends lengthwise on the blister sheet.  
   
   
       6 . The folding method of  claim 1 , wherein the center folding line extends crosswise on the blister sheet.  
   
   
       7 . The folding method of  claim 1 , further comprising punching a hole at each side of the blister sheet an equal distance from the center folding line.  
   
   
       8 . A blister sheet folded according to the method of  claim 1 .  
   
   
       9 . The blister sheet of  claim 8 , wherein the blister sheet comprises a first and a second column of blisters, and parallel rows of blisters comprising a first row of blisters and a second row of blisters.  
   
   
       10 . The blister sheet of  claim 9 , wherein the blister sheet is formed of a base foil formed with blister cavities connected to a substantially flat lid foil.  
   
   
       11 . The blister sheet of  claim 10 , wherein the blisters in the second row are so placed relative to the blisters in the first row that each blister in the first row will cover a blister in the second row when the blister sheet is folded halfway between the first and second rows, wherein when the blister sheet is folded, the flat lid foil covering each blister cavity will correspond to and cover the flat foil of a blister cavity on a corresponding row of blisters.  
   
   
       12 . The blister sheet of  claim 8 , wherein the center folding line extends lengthwise on the blister sheet.  
   
   
       13 . The blister sheet of  claim 8 , wherein the center folding line extends crosswise on the blister sheet.  
   
   
       14 . The blister sheet of  claim 8 , wherein there is a hole at each side of the blister sheet an equal distance from the center folding line.