Air pervious weatherstrip

A weatherstrip mountable on at least one of a pair of relatively movable closure members for providing sealing engagement thereof with controlled air infiltration laterally therethrough without increasing the forces needed to move said members, said weatherstrip comprising

• a backing strip which is fixed to one of said pair of closure members when said weatherstrip is mounted thereon,
• a membrane of air pervious material extending longitudinally along said backing strip and attached thereto along a line running between the edges of said backing strip, at least one edge of said membrane being free,
• two rows of pile fibers extending longitudinally along said backing strip and being attached thereto and projecting therefrom,
• said pile fibers projecting outwardly from said backing strip toward the other of said pair of closure members, said rows of pile fibers having a density such that air can pass through said rows when said closure members are in engagement and such that the stiffness of said pile is insufficient to interfere with the movement of said closure members by requiring movement forces of large magnitude, and
• said membrane being in juxtaposition with said rows on opposite sides of said membrane and being maintained in vertical position with said free end upright for providing limited passage of air laterally through said weatherstrip.