Riser for a vertically-opening door

Details Riser for a vertically-opening door Riser for a vertically-opening door

1986-09-25

1988-10-11

Britts, Ramon S.

Flexible or portable closure, partition, or panel

Pleating type

Lazy-tong links pivot about axes parallel to panel

160271, E06B 394

Patent

active

047763795

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.

REFERENCES:
patent: 2731804 (1956-01-01), Grubbs
patent: 2858408 (1958-10-01), Barroero
patent: 3697723 (1972-10-01), Winsler et al.
patent: 4194549 (1980-03-01), Lovgren
patent: 4397347 (1983-08-01), Brabant

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