| 摘要 |
Capsules (30) are made using films (18) of a water-soluble or digestible polymeric material, by deforming the films to form a multiplicity of enclosures between a pair of rotary welding dies (14 and 15), and filling the enclosures with a flowable filling material. The films are welded by dielectric welding at the rotary welding dies. Radio frequency power is coupled to or from each rotary die (14 and 15) through the bearings (56, Figure 3) that support the shafts (50,52, Figure 3) carrying the dies. The bearings (56) are supported in electrically insulating blocks (57) which are pushed towards each other so that the films are under pressure as they pass between the dies. The capsules may be used for pharmaceutical products. |
