Reinforcing carrier, weatherseal with such a reinforcing carrier and method for producing such a weatherseal

A reinforcing carrier comprises two flanking portions (21, 23) and a middle portion (22) having several perforations (24 - 26) that contain a closed circumference and having first and second diameters (d1, d2) in the transverse and longitudinal direction, respectively such that the ratio of the first diameter to the width (b1 - b3) of the three portions is maximally 1:5. The three portions extend parallel in a longitudinal direction and have in each case a width in a transverse direction perpendicular to the longitudinal direction. The middle portion connects the first and second flanking portions in a transverse direction. Independent claims are included for the following: (1) a weatherstrip for a motor vehicle, comprising a fastening portion strengthened by the reinforcing carrier, and at least one sealing portion; (2) a method of fabricating a weatherstrip involving surrounding the reinforcing carrier by an elastomer without the assistance of an adhesion promoter.