PNEUMATIC TUBE OR HOSE FOR RELEASABLE AIRTIGHT CONNECTION TO A PNEUMATIC PORT AND RESPECTIVE PNEUMATIC PORT

The invention refers to a pneumatic tube or hose (28) having a longitudinal axis (70) along a longitudinal extension of the pneumatic tube or hose (28) and having two ends each provided with a socket (30; 66) adapted for releasable airtight connection to a pneumatic port (26; 64) of a vacuum generation unit (2; 48) and/or to a pneumatic port (42; 64) of a vacuum utilization device (32; 44), respectively. It is suggested that at least one of the sockets (30; 66) of the pneumatic tube or hose (28) comprises at least one magnetic element (80) adapted for interaction with at least one respective magnetic element (78) provided in a vacuum generation unit (2; 48) and/or in a vacuum utilization device (32; 44) in order to secure the socket (30; 66) of the pneumatic tube or hose (28) to the pneumatic port (26; 42; 64) of the vacuum generation unit (2; 48) or of the vacuum utilization device (32; 44) by means of magnetic force (82; 94; 100). Further, the invention refers to a pneumatic port (26; 42; 64) of a vacuum generation unit (2; 48) and/or to a pneumatic port (42; 64) of a vacuum utilization device (32; 44), to which the socket (30; 66) can be releasably attached and secured by means of the magnetic force (82; 94; 100).