Envelope

Abstract

The envelope is so arranged that a sheet is folded into two to form a front sheet 10 having an address face and a rear sheet 11 having a folded face, an enclosing area S having an opening 17 is provided between the front sheet 10 and the rear sheet 11, a surface of the front sheet 10 facing to the rear sheet 11 and a surface of the rear sheet 11 facing to the front sheet 10 are directly pasted at side portions f 2 except for the opening 17 and a folding line 13, the front and the rear sheets 10, 11 generally overlap each other and generally whole area of the enclosing area S consists of a same number of the sheets.

1 . An envelope wherein a rear sheet is integrally provided with a front sheet having a face on which an address is to be shown through a folding line and an enclosing area having an opening is formed between the front and the rear sheets each of which is folded along the folding line, 
 and characterized by that side portions except for the opening and the folding line of the front sheet and the rear sheet are directly pasted each other, the front sheet and the rear sheet generally overlap each other and generally whole area of the enclosing area consists of a same number of the sheets.    
     
     
         2 . The envelope described in  claim 1  and characterized by that a cutout portion is provided at both sides or one side of the side portions forming the opening of the rear sheet.  
     
     
         3 . The envelope described in  claim 1  or  claim 2  wherein a flap is integrally provided with a side portion forming the opening of the front sheet through a second folding line, 
 and the flap has a shape that generally overlaps with the rear sheet.  
 
     
     
         4 . An envelope wherein a rear sheet having a folded face and a flap are provided through a folding line respectively at both ends of a front sheet and the front sheet and the rear sheet are directly pasted, 
 and characterized by that the rear sheet has a width that is gradually tapered from the folding line.    
     
     
         5 . An envelope wherein a rear sheet having a folded face and a flap are provided through a folding line respectively at both ends of a front sheet and the front sheet and the rear sheet are directly pasted, 
 and characterized by that the rear sheet has a width that is gradually narrowed from a position away from the folding line by a certain length.