公开(公告)号：US5194309A

公开(公告)日：1993-03-16

申请号：US439196

申请日：1989-11-20

Applicant: Rolf Knudsen

Inventor： Rolf Knudsen

IPC: E05D13/00 ,  E05D15/06 ,  E05D15/16 ,  E05D15/44 ,  E06B3/34 ,  E06B3/44 ,  E06B3/46 ,  E06B3/50

CPC classification number: E06B3/5018 ,  E05D15/165 ,  E06B3/44 ,  E06B3/46 ,  E06B3/50 ,  E06B3/5063 ,  E05D15/0652 ,  E05Y2201/684 ,  E05Y2800/46 ,  E05Y2900/132 ,  Y10T428/161 ,  Y10T428/24174 ,  Y10T428/2419 ,  Y10T428/24264 ,  Y10T428/24479 ,  Y10T428/2457 ,  Y10T428/24777 ,  Y10T428/2495

Abstract: A flat web-shaped blank is formed with a pair of parallel recesses, each of which defines an angle of less than 90.degree. to permit the faces of the recess to press against each other when the side sections of the blank are pivoted into a U-shape. The pressing of the lateral faces of the recess against each other serves to bias the side sections away from each other. The flat blank can be wound in a coil for storage and transportation purposes. The blank can be readily shaped into a U-shaped guide rail and inserted into the groove of an associated window frame portion. Shoulders on the outside of the side sections of the blank can snap fit into grooves in the walls of the groove of the window frame portion.