| 摘要 |
1. A preformed part (1) made of a plastics material with integrally formed rubber-elastic parts (9) comprising a closed protruding raised rib (6) or circularly-closed ring-shaped rib around recesses, bore holes (2) or borders, into which or around which the rubber-elastic parts (9) are formed by injecting, pressing or pouring in a form material followed by interlacing or hardening in some other way, which protruding raised rib is destinated to avoid an overflow of the form material to those portions of the surface (3) of the preformed part not to be coated when the rubber-elastic parts are formed, characterized in that the protruding raised rib (6) is arranged in a predetermined distance (4) with respect to the edge (5) of the recess, the bore hole (5) or the border of the preformed part (1) at that surface portion (3) of the preformed part which portion is adjacent to the edge. |
