| 摘要 |
A weatherseal is made by extruding a resin base with a relatively thick, flat support portion and a relatively thin, portion U-shaped in cross section and joined to opposite side edges of the support portion to arch over the center of the support portion. While the resin material is still plastic, a pressure differential expands the U-shaped portion to reduce the thickness of the walls of the U-shaped portion, and then each side of the U-shaped portion is cut at a predetermined distance from the support to leave a pair of thin, spaced-apart resilient fins. Then fibrous pile material is secured to the support between the fins to form a double-fin, pile weatherseal.
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