| 摘要 |
The invention relates to an envelope for use in post sending, for documents or any other object custody, which allows the opening by its own means. The envelope according to the invention consists of a body comprising two walls - an anterior one and a posterior one - tied up by three edges, a superior flap (f) joined to the anterior wall (a) by a superior edge (9), a stitch (3) realised by sewing with two threads the superior edge (g), and by drawing the corner envelope (5), detached by the body (1) due to the tearing of the material the envelope is made of on the contour traced by some rows of perforations (p and r) cuts the contour traced by the perforations (k), so that the body (1) is opened by its own means. |
