Sealing extruded section for being mounted on a projecting part of a structure, blank of said section and method for fixing said blank on the projecting part

Sealing extruded section with a U- or Ω-shaped transversal section, made of elastomer or plastomer, without a rigid reinforcement buried partially in its mass, said section possibly including a sealing element (6) adjacent to its base or to one of its branches and projecting toward the section's exterior and being designed to be mounted on a projecting part of a structure (8), especially a frame for an opening in the body of a car, by means of a tight clamp, and being characterized in that it comprises:

• two elastomer or plastomer shells (1, 2), each comprising a wing (1a, 2a) and an adjacent part (1b, 2b) forming a portion of the section base, said two shells preferably being arranged in more or less symmetrical fashion along a cross-section of the section and separated from each other by an opening (3) made through the section base and extending lengthwise along its median part;
• a layer (7) of a flexible material that is inextensible or slightly extensible, applied to the interior of the two shells (1, 2) so as to secure the two wings (1a, 2a) and the adjacent parts (1b, 2b) to their respective section base;
• a wedging shim (4) with a cross-section substantially similar to that of the opening (3) separating,the shells (1, 2), into which it is engaged by force, the cross-section of the opening (3) being such that when the wedge (4) is fixed in place, it causes these shells to swing away from each other thanks to the layer (7) of flexible material connecting the two shells, thereby bringing the free ends of the section's two wings closer together.