| 摘要 |
A trackless roll-up door covering to contain materials within, and prevent animals from entering, a building or enclosure having a large door opening. In one embodiment of the invention an open weave vinyl coated polyester moisture resistant quick drying fabric material is fixedly weighted at a first end and fixedly attached to a tubular assembly at a second end. The tubular assembly is rotated by rotatable drive means, such as a motor, hand crank, spring loaded mechanism, which extends the fabric when operated in a first direction and retracts the fabric when operated in a second direction. Strapping means are used to secure the fabric material when it is extended to loosely close cover the door opening. Additional strapping means are optionally used to further secure the fabric material and prevent bowing in the center of the extended material.
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