Patent ID: 9746289
Date: 2017-08-29
CPC Classifications: E06B,F41H,F42D

Claim:
1. A rolling door comprising: a plurality of slats, each slat affixed to adjoining slats through a plurality of joints thereby forming a rolling door curtain and each slat having an internal volume formed by a separation of a front panel and a back panel; an internal reinforcement contained within each of a plurality of the internal volumes and comprised of one or more pieces of high strength material resistant to deformation and having greater thickness than the front panel and the back panel, the internal reinforcement having a hollow shape with a substantially rectangular cross-sectional profile, and oriented to follow an internal perimeter of each slat such that at least one side of the internal reinforcement is in contact and parallel to the front panel and another side of the internal reinforcement is in contact and parallel to the back panel; and at least one core material contained and surrounded by the internal reinforcement, the at least one core material comprised of a lower strength material than the internal reinforcement.