Patent ID: 7251916

Claim:
Boards with laterally mounted locking elements by means of which two of the boards may be interconnected by positive fit, characterized in that: the locking elements are designed so that there is an initial position in which the boards are interlocked in a common plane by a positive fit in at least one direction and that there is play at a common joint formed by a joint surface on each of the two boards, said play comprising limited movement of the two boards in said common plane to space said joint surfaces, and there is a final position in which there is no play at the common joint and the boards are interlocked, said locking elements also including a surface extending in a direction along said common joint on each of said two boards, said surfaces being separated by a decreasing and increasing distance when said boards in said initial position are shifted in a direction parallel to said common joint, and said boards are relatively movable in a direction parallel to said common joint to engage said surfaces so as to bias said boards together and dispose said locking elements in said final position with no play at said common joint.