| 摘要 |
<p>Tray-shaped element, essentially rectangular in shape, suitable to form one half of a packaging box for printed circuit boards, including a nottom board (50) with side walls (1, 2, 3, 4) extending on one side and along the whole perimeter of the bottom board (50). Each wall of the element (1, 2, 3, 4) foresees strainght indentations (11, 13, 21, 33; 32, 33, 42, 43) in the wall thickness and straight projections (12, 14, 22, 24; 31, 34, 41, 44) from the middle profile or wall height, each indentation on one wall facing a complementary projection on the opposite wall; the element also foresee two pairs of curved indentations on two opposite walls, the indentations of the first pair (15A, 15B) being performed close to the corners of the wall and foreseeing a flat portion (19A, 19B) essentially forming an estension of the bottom board (50), while the indentations of the second pair (17A, 17B) foresee a flat portion (16A, 16B) parallel to the bottom board, said flat portion being supplied with openings (51, 52) to cooperate with the closing means of two coupled elements. <IMAGE></p> |
