| 摘要 |
<p>A section for window and door frames, particularly for a wing of an orientable-slat shutter, includes in its profile a channel portion (1c), defining an open hollow space (2), which is provided with a first aperture having a width ( l ) and is adapted to receive a slat driving device or other material for window and door frames. The channel portion (1c) has, in at least one of its sides (20, 21) , a part (201, 211) delimitated, at one end, by said first aperture and, at the other end, by a weakening recess (30, 31) for a preset fracture. Said first aperture can be changed into a second aperture having a width (L) greater than the first aperture width ( l ), by tearing one or more longitudinal strips (3, 4) of section corresponding to said parts (201, 211) of its profile, along a weakening line generated by said recess (30, 31). <IMAGE></p> |
