| 摘要 |
The present invention relates to a porous support (20) intended to be removably positioned on a top side(11 b) of a perforated plate (11) of a table (10) of a vacuum hold down device (1), said perforated plate having a bottom side (11a) connected to a vacuum system (13) for producing reduced pressure on said bottom side, wherein the porous support comprises a perforated tray (21) provided on one side (21 a) with outer reliefs (23) and on the other side (21 b) with a blade penetrable porous structure (22) fixed thereon. The invention further relates to a vacuum hold down device (1) comprising such a support. The invention also relates to a process for replacing a first porous support by a second porous support in such a device. |
