| 摘要 |
This method involves the steps consisting in: a) paying out a strip (1) of synthetic filter medium having two longitudinal edges (2, 3) and guiding it in a feed direction, b) making a plurality of score lines (6) on the strip (1) in a direction transverse to the longitudinal edges (2, 3), c) raising the temperature of two longitudinal zones (8, 9) each located near a longitudinal edge (2, 3) of the strip (1) so as to cause same to melt, and d) folding the strip (1) of filter medium along each score line (6) so that a portion of a longitudinal zone (8, 9) positioned upstream of a score line (6) in the direction of feed of the strip (1) of filter medium is welded to a portion of a longitudinal zone (8, 9) positioned downstream of this score line (6). The invention also targets a device (200) for implementing the method as described hereinabove and a filter (100) for a motor vehicle. |
