摘要 |
<p>There is disclosed a foldable envelope consisting of two or more portions which can be telescopically coupled on a tubular central body. The envelope essentially comprises a tubular body (1),of given cross-section,provided with outwardly turned edges (2). With the tubular body (1) two box-like bodies (3,3 min ) cooperate,having related cross-sections,and provided with inwardly turned edges (4) and adapted to operate as closure covers for the tubular body (1).</p> |