| 摘要 |
A screen comprises a screen frame (10) and successively mounted and mutually overlapping screen cloth elements (16). The downstream end (B) of the screen cloth elements is secured to the screen frame (10) by snap lock means (13, 23; 17, 18), whereas their upstream end (C) is clamped between the screen frame (10) and a portion (20) of the following screen cloth element, provided outside the snap lock means (13, 23; 17, 18). According to the invention, the screen cloth elements (16) have additional snap lock means (17, 19; 14) at least at one location between its ends (B, C). The one part (17, 19) of these additional snap lock means (17, 19; 14) projects further from the underside of the screen cloth element than the part (18) of the snap lock means positioned at the downstream end (B) of the screen cloth element in order to be able to extend downwards between guide means (12) included in the screen frame (10). The other part (14) of the additional snap lock means has the form of a strut element (14) extending between said guide means (12). |
