Slat connecting system for a roll-up truck bed cover

A slat connecting system for a roll-up truck bed cover comprising an array of a plurality of contiguously arranged elongated slats and a plurality of flexible elongated seal members, wherein the elongated slats are pivotably hinged together, wherein an elongated slat comprises a main slat body having a first elongated edge and an opposite second elongated edge, a first elongated hinge member is provided in the vicinity of the first elongated edge along its length, and a second elongated hinge member is provided in the vicinity of the second elongated edge along its length, the first elongated hinge member of a slat of the array of the plurality of contiguously arranged elongated slats is configured for being pivotably interconnected to the second elongated hinge member of the adjacent slat of said array, wherein the first elongated hinge member has a first coupling groove member having a first groove opening facing away from the second elongated hinge member, the first coupling groove member extends into a coupling hook having a hook opening facing towards the second elongated hinge member, and wherein the first coupling groove member is closer to the main slat body than the coupling hook, the first coupling groove member is disposed at least partly laterally retracted from the first elongated edge below the main slat body and accommodates a part of the flexible elongated seal member which extends between adjacent slats.