| 摘要 |
<p>This is a folder for special correspondence such as registered letters that makes sure the receipt of communications inside of it as the carrier authenticates only one sheet of paper that is both envelope and letter. In this invention the folder can close through overlaid margins, that are indissolubly glued and sealable; the opening assures preservation of the seal; it has a double closing internal pocket to contain attachments; the letter is minimum 4/6 of the total sheet surface, where 3/6 are on one side and 1/6 is writable on the back side. The fold that has at least pre-printed conditions on the external opening side like in the sketch, it is suitable for overprint to realize particular forms. (words shown in the sketch are part of the same sketch). For example we can have a folder for cashing of stocks through mail.</p> |
