US Patent 7445264 Cover system for truck box

A fastening system for a flexible cover system for a truck box includes a first fastening means on the side edges of the flexible cover and a second fastening means that releasably engages with the first fastening means. The second fastening means comprises a fastening surface disposed on an elongated slat, and is slidingly received in channel portions of side rails mounted on the side of the truck box. The first fastening means can be one member of a hook and loop type fastener and the second fastening surface can be the mating member of the hook and loop type fastener. The elongated slat may also be shorter than the channel portions of the side rail to permit the slat to slide within the channel during operation of the cover system.