| 摘要 |
In a device, for example a cross-flow filtration device, including a tube (1) of porous PTFE having an end (14) secured in an opening (2) through a wall (3) of the device, the end (14) of the tube is bell-shaped and fits within a correspondingly shaped portion (15) of the opening. The bell-shaped end of the tube is secured firmly in position generally by a tubular insert (16) located under compression within the bell-shaped end (14) of the tube in the opening. When the wall of the device is made of a suitable plastics material, however, the end of the tube may be secured, additionally or alternatively, by means of a heat bond formed by melting the surrounding portion (15) of the opening in contact with the bell-shaped end (14) of the tube. <IMAGE> |
