| 摘要 |
The invention relates to a method for producing a gastroretentive tube system by forming tubular bags in a production station. The contents of the system are an amount of a substrate that can be dosed and that produces gas and/or swells in contact with a liquid. The tubular bag is simultaneously filled with contents during the production in the production station. The method is characterised by a sequence of working steps. In the first working step, a foil string (4) being a source material from a store (2) is guided over a flat funnel, laterally on the outside and on the rectangular surfaces of the funnel (5). In the second working step, the lateral areas of the foil string are welded together to form the flat tube when they leave the narrow component of the funnel in the direction of the production passage. In the third working step, the discharge side of the tube is provided with a first transverse sealing seam (22) to form a tube section and in the fourth working step, said tube section is filled with the exactly dosed amount of contents. In the fifth working step, the tube section is sealed with a second transverse sealing seam (21) and in the last working step, the filled and sealed tubular bag (11) is separated from the following bags.
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