Method and blank for producing a substantially U-shaped guide rail in a window frame groove
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United States of America Patent
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-
Mar 16, 1993
Grant Date -
N/A
app pub date -
Nov 20, 1989
filing date -
Nov 23, 1988
priority date (Note) -
Expired
status (Latency Note)
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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.
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