Patent ID: 7677001

Claim:
A system for making a flooring which comprises rectangular floorboards which are mechanically lockable, in which system the individual floorboards along their long sides have pairs of opposing connectors for locking together similar floorboards both vertically and horizontally and along their short sides have pairs of opposing connectors which lock the floorboards horizontally, the connectors of the floorboards are adapted so as to allow locking-together of the long sides by inward angling along an upper joint edge, inward angling being where a first long side edge of a first floorboard is pressed against an upper part of a second long side edge of a second floorboard and the first floorboard is angled down, and wherein the connectors of the floorboards are adapted so as to allow locking-together of the short sides by vertical folding, vertical folding being where a long side edge of a first floorboard is pressed against an upper part of a second long side edge of a second floorboard and when the first floorboard is angled down a short side edge of the first floorboard is folded down into a connection with a side edge of a third floorboard, the system comprises two different types of floorboards, the connectors of one of the types of floorboards along one pair of opposite edge portions being arranged in a mirror-inverted manner relative to the corresponding connectors along the same pair of opposite edge portions of the other of the type of floorboards, a short side being lockable to a long side vertically and horizontally, and a short side being lockable to a long side horizontally by vertical folding, and horizontal connectors on the short sides having cooperating locking surfaces which are formed different from the cooperating locking surfaces of the horizontal connectors of the long sides.