Foam core vane for door and window covering
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United States of America Patent
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-
Oct 2, 2001
Grant Date -
N/A
app pub date -
Aug 10, 1999
filing date -
Aug 10, 1999
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Foam core vanes useful with door or window coverings and which may be hung vertically or horizontally include an outer fabric cover and an inner foam core. Preferably, the vanes are shaped to have a blunt forward edge, gently curving sides and a pointed rear edge, resembling an air foil. A method of preparing the vanes includes injecting foam producing chemicals into a fold of the outer fabric as the fabric enters a mold section comprised of upper and lower molds moving along tracks. The foam expands to press the fabric into the mold and cures during travel through the mold section. A rotary knife cuts the foam core vanes to the desired length. Preferred foams are urethane and polyisocyanurate foams.
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