Support frame has row of profiled elements converging at corners, connecting angle pieces, profiled elements with lengthwise grooves holding wiper lips and guide

摘要

The support frame (3) comprises a row of separate extended profiled elements (7) which converge in pairs in a shared corner (4). Connecting angle pieces (2) have a first thrust surface matching the opposite facing peripheral flat surfaces of the profiled elements which have a lengthwise groove (11) in which the wiper lips (8) are held. The wiper lips protrude to an adjacent guide. The angle pieces are positioned in the frame near to the corners, and comprise at least one second thrust surface (14) on the wiper lips. The second surface, together with the peripheral surfaces of the profiled elements defines a space on the angle piece in which the ends (13) of two adjacent wiper lips are held in a permanent, gap-free join.