Floorboards with decorative grooves

1. A floorboard system comprising a plurality of floorboards, each of the floorboards having a core made of wood-fiber based material and a surface layer which is arranged on an upper side of the core, the surface layer having a substantially planar outer surface facing away from the core and extending in a horizontal plane, said surface layer comprising at least one decorative layer and a reinforcing layer arranged between the decorative layer and the core, each of the floorboards having a connector at opposing edges thereof for connecting the floorboard to an adjacent one of the floorboards in a vertical direction and along a vertical joint plane, wherein at a portion of each of the floorboards adjacent the edges the reinforcing layer is exposed and the exposed portion extends horizontally in a plane that is essentially parallel to the horizontal plane, wherein the reinforcing layer extends substantially the entire area of the decorative layer.

2. The system as claimed in claim 1 , wherein the exposed portion of the reinforcing layer extends inwards from the edge a distance which is at least 0.1 times a thickness of the floorboard.

3. The system as claimed in claim 2 , wherein the plane of the exposed reinforcing layer is positioned at a distance from the horizontal plane which is at least 0.1 times a thickness of the surface layer.

4. The system as claimed in claim 1 , wherein the plane of the exposed reinforcing layer is positioned at a distance from the horizontal plane which is at least 0.1 times a thickness of the surface layer.

5. The system as claimed in claim 1 , wherein the connector is formed for mechanical joining of neighboring floorboards about a vertical plane both perpendicular thereto and perpendicular to a front side of the floorboard.

6. The system as claimed in claim 1 , wherein the floorboards are quadrilateral and have a surface layer of laminate and a decorative joint edge portion in all their opposite joint edge portions.

7. The system as claimed in claim 1 , wherein the connector joins the floorboard with the previously installed floorboard by at least one of inward angling and snapping-in to a locked position.

8. The system as claimed in claim 7 , wherein the floorboard is a quadrilateral, the surface layer is of laminate, and the edge portions are impregnated.

9. The floorboard system of claim 1 , wherein the exposed reinforcing layer is visible from a front side of the floorboard when the floorboard and the adjacent floorboard are connected.

10. The floorboard system of claim 1 , wherein the wood-fiber based material is medium density fiberboard or high density fiberboard.

11. A floorboard comprising:

a core made of wood-fiber based material;

at least one surface layer, the surface layer arranged on an upper side of the core and having a substantially planar outer surface facing away from the core and extending in a horizontal plane, said surface layer including at least one decorative layer and a reinforcing layer arranged between substantially all of the one decorative layer and the core; and

a connector at opposing edges of the floorboard for joining, in a vertical and a horizontal direction, the floorboard with a similar adjacent floorboard,

wherein at a portion of the floorboard adjacent at least one of the opposing edges, the reinforcing layer is exposed and the exposed portion extends horizontally in a plane that is essentially parallel to the horizontal plane.

12. The system as claimed in claim 11 , wherein the floorboard is a quadrilateral, the surface layer is of laminate, and the edge portions are impregnated.

13. The system as claimed in claim 11 , wherein the connector joins the floorboard with a previously installed floorboard by at least one of inward angling and snapping-in to a locked position.

14. The floorboard of claim 11 , wherein the exposed portion of the reinforcing layer is at both opposing edges having the connector.

15. The floorboard of claim 11 , wherein the exposed reinforcing layer is visible from a front side of the floorboard when the floorboard and the adjacent floorboard are connected.

16. The floorboard of claim 11 , wherein the wood-fiber-based material is medium density fiberboard or high density fiberboard.

17. A system for making a decorative joint portion at two adjoining joint edges of laminate floorboards which each have a core made of wood-fiber based material and a laminate surface layer arranged on an upper side of the core and connectors arranged at said adjoining joint edges for connecting the floorboards with each other in a vertical or horizontal direction, parts of the laminate surface layer closest to said adjoining joint edges forming a horizontal plane and the laminate surface layer comprising an upper layer and an underlying layer, at least two of said adjoining joint edges have exposed surfaces which extend horizontally and comprise the underlying layer and which are essentially parallel to the horizontal plane, wherein the underlying layer extends substantially the entire area of the upper layer.

18. The system as claimed in claim 17 , wherein said underlying layer is a reinforcing layer or a decorative layer.

19. The system as claimed in claim 17 , wherein the connectors connect the floorboards with each other in the vertical and horizontal directions.

20. The system of claim 17 , wherein the underlying layer that forms the surface of the adjoining joint edges is visible from a front side of the floorboard when the floorboard and the adjacent floorboard are connected.

21. The system of claim 17 , wherein the wood-fiber-based material is medium density fiberboard or high density fiberboard.

22. A laminate floorboard comprising a core made of wood-fiber based material and a laminate surface layer arranged on an upper side of the core and connectors arranged at opposite joint edges of the floorboard for joining the floorboard with an essentially identical floorboard in the vertical or horizontal direction, parts of the laminate surface layer closest to said joint edges forming a horizontal plane, and the laminate surface layer comprising an upper layer and an underlying layer, at least two of the joint edges of the floorboards have exposed surfaces which extend horizontally and comprise the underlying layer and which are essentially parallel to the horizontal plane, wherein the underlying layer extends substantially the entire area of the upper layer.

23. The system of claim 22 , wherein the exposed underlying layer is visible from a front side of the floorboard when the floorboard and the adjacent floorboard are connected.

24. The system of claim 22 , wherein the wood-fiber-based material is medium density fiberboard or high density fiberboard.