Roll door

Details Roll door Roll door

1987-03-24

1990-01-30

Johnson, Blair M.

Flexible or portable closure, partition, or panel

Roll type

With rotating means

160264, E06B 908

Patent

active

048967149

ABSTRACT:
A roll door assembly has a flexible roll door rollingly supported in a frame; a counterweight assembly employing fixed and movable pulleys and a counterweight retains the roll door taut.

REFERENCES:
patent: 15447 (1856-07-01), Wearer
patent: 1550237 (1925-08-01), Beckman
patent: 3154303 (1964-10-01), Cavallero et al.
patent: 3460602 (1969-08-01), Hugus
patent: 3710050 (1973-01-01), Richards
patent: 3878879 (1975-04-01), Manns
patent: 4133365 (1979-01-01), Schleicher
patent: 4369344 (1983-01-01), Diamond
Brochure-Kelley Rapid Roll Door-Form 20-210.

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