Abstract: There is described a process for manufacturing a single-component cover (10) for filters for vehicles substantially comprising the steps of: providing a starting single-component slab (10); drawing the slab (10) in the central part (34) thereof; reducing the thickness of the external edge (30) of the slab (10), by a bending step followed by a drawing step and three further bending steps, and by trimming the external edge (30); finally forming the external edge (30); punching the slab (10) in the central part (40) thereof; turning the edge in the central drawn part (40) of the slab (10); threading this central hole (42); and seaming the external edge (30) of the slab (10) to a filter-containing cup (14). (FIG.

Abstract: An apparatus for manufacturing filters for motor vehicles essentially consists of a die (1, 2) in which the filtering element (9) is introduced, around which a channel (25) is formed where a movable frame (10) is lowered having a shape substantially corresponding to that of the filtering element (9), so as to define an injection cavity (27) separated from the filtering element, and an expansion cavity (28) adjacent the filtering element (9) that are communicate one another by the lifting of the movable frame (10), whereby the resin can expand and stick to the filtering element (9). The die is provided with a seal groove (3) acting as a seal gasket and is filled with synthetic resin during the expansion thereof, which resin prevents any further resin from entering the space between the die (2) and the movable frame (10).