Patent ID: 11898402
Assignee: CORNELLCOOKSON, LLC
Field: Civil engineering (Other fields)
Classification: CPC E  A | IPC E

Claim 0:
1. A roll-up door guide assembly for securing a rollup door to a structure comprising:
a first guide secured to the structure, the first guide having a throat and a track, the throat having an opening width smaller than a width of the track; and
a flexible curtain disposed within and in sliding engagement with the first guide from an extended position to a retracted position, the flexible curtain including:
a first side edge disposed at an edge of the flexible curtain,
a first reinforcement band coupled to the first side edge, wherein the first reinforcement band comprises a metal,
a first retention band welded to the first reinforcement band and mounted along the first side edge, the first retention band comprising an elastic material that returns to a curved shape after being held in a flattened configuration when the flexible curtain is coiled, the first retention band including:
a fixed edge attached to the flexible curtain along the first side edge;
a free edge opposite from the fixed edge, wherein the free edge is biased away from the flexible curtain when the first retention band is in an expanded configuration, and the free edge is urged toward the flexible curtain when the first retention band is in the flattened configuration, wherein a distance between the free edge and the flexible curtain is greater than the opening width of the throat in the expanded configuration; and
a seal disposed along an end of the flexible curtain extending between the first side edge and a second side edge opposite the first side edge,

the flexible curtain having a pull-out strength of about 1.1 pounds to 50.0 pounds per linear inch of first retention band at a temperature of about 400° Fahrenheit when the flexible curtain is disposed within the first guide.