Patent ID: 7140493

Claim:
A flat, planar dust cover having free outer edges and formed of a flexible material, said dust cover having a friction locking mechanism for securing the dust cover to an open-topped container, said friction locking mechanism comprising at least one cut-out slot formed adjacent a free outer edge of the dust cover, said cut-out slot having a front edge defined by a narrow strip of said flexible material between said slot and said adjacent free outer edge of said dust cover, a back edge, and two side edges, at least one bendable flap in the slot, having a front edge spaced from but adjacent to the front edge of the slot, a back pivot line coinciding with the back edge of the slot, and two side incision lines coinciding with the side edges of the slot, wherein said flap can pivot along said back pivot line in an upwards direction, and a strip of reinforcing tape extends through said narrow strip to increase tear resistance of said dust cover, said strip of reinforcing tape having a width to extend from said adjacent free outer edge to an inner location spaced beyond said front edge of the slot and extending over at least a front edge portion of said flap.