Patent ID: 9010401
Filing Date: 2015-04-21
Classification: B60J,E06B,Y10T

Abstract:
1. A roll-up door comprising a plurality of panels joined together at upper and lower portions thereof with hinges and further comprising roller assemblies mounted to sides of the panels for mounting the panels in channels for movement between an upper position and a lower position, the improvement comprising at least some of the panels are formed of thermoplastic material that is blow-molded into hollow panels that have a relatively flat outside wall and an inside wall, wherein the inside wall is characterized by longitudinal, horizontal ribs formed by open-sided, longitudinally extending channels that extend toward the outside wall and at least some of the longitudinally-extending channels are fused to the outside wall of the panels, and vertical ribs that intersect the horizontal ribs and extend through the open-sided, longitudinally extending channels; and the hinges are mounted to the thermoplastic blow-molded panels with fasteners that extend through the inside wall of the thermoplastic blow-molded panels.