This invention relates to a board with tongue and tenon and method for manufacture of the board with tongue and tenon. Board with tongue and tenon, which can be joined together without using other tools, comprises a hard board having a rectangular shape having a top side, a bottom side, a first lateral side opposite to and parallel with a second lateral side and perpendicular to a third lateral side opposite to and parallel with a fourth lateral side, the first lateral side and the third lateral side having a male connector thereon and the second lateral side and the fourth lateral side having a female connector thereon, characterized in that said insertion of the male connector into the female connector moves along a curve which is a part of a first ellipse; a second ellipse; and a third ellipse, wherein the first ellipse, the second ellipse, and the third ellipse are concentric.

This invention relates to a board with tongue and tenon and method for manufacture of the board with tongue and tenon. Board with tongue and tenon, which can be joined together without using other tools, comprises a hard board having a rectangular shape having a top side, a bottom side, a first lateral side opposite to and parallel with a second lateral side and perpendicular to a third lateral side opposite to and parallel with a fourth lateral side, the first lateral side and the third lateral side having a male connector thereon and the second lateral side and the fourth lateral side having a female connector thereon, characterized in that said insertion of the male connector into the female connector moves along a curve which is a part of a first ellipse; a second ellipse; and a third ellipse, wherein the first ellipse, the second ellipse, and the third ellipse are concentric.

The present invention provides a jig for fabricating a concave-convex structure. The jig for fabricating a concave-convex structure is coupled to a multipurpose woodworking device including a woodworking work table for performing a plurality of operations for forming a concave-convex structure and a router mounted on the woodworking work table to perform the operations for forming a concave-convex structure, using a plurality of end mills. Furthermore, the jig for fabricating a concave-convex structure includes at least one of a wood piece support jig supporting or fixing a wood piece to be fabricated, a shaping guide jig allowing for forming shapes corresponding to the operations for forming a concave-convex structure, and a stopper jig maintaining X-axial movement of the router by intervals corresponding to the operations for forming a concave-convex structure. Accordingly, it is possible to easily fabricate circular, round, rectangular, dovetailed, and gallery-shaped grooves and joints.

Building panels, especially floor panels are shown, which are provided with a locking system that is configured to lock the adjacent edges by angling and that have a tongue and a strip on the same edge, and a method to divide a board and produce such building panels. A method for dividing a floor element, into a first floor panel and a second floor panel, said floor element including a core provided with a decorative surface layer and a balancing layer, wherein the method includes the step of forming, through the balancing layer or the decorative surface layer, a second groove by displacing the floor element past a fixed tool.

Building panels, especially floor panels are shown, which are provided with a locking system that is configured to lock the adjacent edges by angling and that have a tongue and a strip on the same edge, and a method to divide a board and produce such building panels. A method for dividing a floor element, into a first floor panel and a second floor panel, said floor element including a core provided with a decorative surface layer and a balancing layer, wherein the method includes the step of forming, through the balancing layer or the decorative surface layer, a second groove by displacing the floor element past a fixed tool.

A castellated wood beam, comprises a first beam section and a second beam section, said first beam section and said second beam section being cut from an initial wood blank along a cut line pattern defining a plurality of section lands and section grooves in the first beam section and the second beam section. The first beam section lands are connected with the second beam section lands after rotating one of the first beam section and the second beam section with respect to the other beam section about a rotation axis transverse to a longitudinal axis of the initial wood containing blank and aligning the lands.

Floorboards with a mechanical locking system that allows movement between the floorboards when they are joined to form a floating floor. A semi-floating floor including rectangular floorboards joined with a mechanical locking system and in which locking system the joined floorboards have a horizontal plane which is parallel to a floor surface and a vertical plane which is perpendicular to the horizontal plane, said locking system having mechanically cooperating locks for vertical joining parallel to the vertical plane and for horizontal joining parallel to the horizontal plane of a first and a second joint edge and in which locking system a vertical lock including a tongue which cooperates with a tongue groove and the horizontal lock including a locking element with a locking surface which cooperates with a locking groove.

Floorboards with a mechanical locking system that allows movement between the floorboards when they are joined to form a floating floor. A semi-floating floor including rectangular floorboards joined with a mechanical locking system and in which locking system the joined floorboards have a horizontal plane which is parallel to a floor surface and a vertical plane which is perpendicular to the horizontal plane, said locking system having mechanically cooperating locks for vertical joining parallel to the vertical plane and for horizontal joining parallel to the horizontal plane of a first and a second joint edge and in which locking system a vertical lock including a tongue which cooperates with a tongue groove and the horizontal lock including a locking element with a locking surface which cooperates with a locking groove.

The invention relates to a machining device, in particular for machining workpieces made from wood, wood materials, plastic or the like, having at least one workpiece table with a first workpiece holder for holding at least one workpiece, furthermore with a second workpiece holder for holding at least one workpiece, wherein the workpiece can be positioned in at least two dimensions, advantageously in three dimensions, during a re-clamping operation from the first workpiece holder into the second workpiece holder.

A device for machining material includes a rotatable turret including a plurality of plank holding positions, each plank holding position including a plank holding device. A projector is configured to project at least one cut line on a first surface of a plank. A cutting device is positioned adjacent to the turret, the cutting device includes a cutting tool configured to cut a trim section along a second surface of the plank to establish a substantially planar portion and/or to locate defects of the first edge. A sensor is configured to scan the first edge of the plank and determine whether the groove and the substantially planar portion are within a predetermined tolerance. A jointing device is positioned adjacent to the turret, the jointing device includes a joint cutting tool configured to cut at least one groove on the second surface.