| 摘要 |
The present invention relates to building panels 1, 1' provided with a mechanical locking system comprising a tongue 30, at firstedge4aof a first building panel1, cooperating with a tongue groove 20, at a second edge4aof an adjacent second building panel1', for vertical locking of the building panels and a method for producing such building panels 1, 1'.The method includes the step of forming the tongue of material of the first edge. The insertion groove (40) may have a sidewall (60) at a third edge (5a), which is adjacent the first edge (4a), and may be open at a fourth edge (5b), which is opposite the third edge. |
