Abstract: The method makes it possible to produce a seal (1) of an extruded plastics material, including a tubular section (3) with a wall of variable thickness (WT), using a distribution chamber having a terminal die plate (12) with an annular extrusion orifice (15) formed therein, corresponding to the cross section of the tubular section (3). A chamber (18) is formed in the distribution chamber in communication with the extrusion orifice (13) and into which an elastomeric material is fed for forming the tubular section (3). The chamber (18) of the distribution chamber is in open communication with the outside environment by a passage (21) which is separate from the extrusion orifice (13) and is provided to carry a flow of elastomeric material coming from the chamber (18).

Abstract: The weather strip comprises a securing portion which has a tubular portion or compartment in which is defined a transversely elongate passage in which is arranged, with clearance, a pressure-sensitive element which comprises a pair of flexible facing electrically conductive strips separated by electrically insulating elements interposed between the lateral longitudinal edges of the strips. A principal wall of the compartment is provided with a projection which faces the transversely intermediate portion of an electrically conductive strip of the sensitive element and which is formed on the wall of the compartment which, in the fitted state of use of the weather strip, faces the edge of the opening.