Riser for a vertically-opening door
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United States of America Patent
Stats
-
Oct 11, 1988
Grant Date -
N/A
app pub date -
Sep 25, 1986
filing date -
Sep 25, 1985
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A vertically-opening door installation which is exposed to cold on one side includes a vertically-opening flexible curtain (6) and two risers to guide the respective side edge of the curtain. Each riser includes a lining (12) made of a material which is a poor conductor of heat and which lines the inside of the channel section bar, and at least one longitudinally-extending cavity (14) providing a cushion of air between the outside surface of the channel section bar and the inside surface of its lining. The inside surface of lining (12) is smooth. At least one of the longitudinally-extending cavities (14) may include electrical heater resistance (15) or similar heating devices. The riser is provided to prevent frost and ice from forming around the side edges of the curtain of a goods-handling door which is exposed to the cold.
First Claim
Family
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Cited Art Landscape
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