Method and apparatus for producing composite filters

The invention relates to a method and an apparatus for producing composite filters for products of the tobacco-processing industry, wherein the device is a Filterhulsenzufuhrelement (10, 130), at least one transport element (12, 100, 123 to 128), into the filter sleeves (11) can be introduced and by means of which the filter tubes (11) comprises at least one processing station (17, 23, 24, 28, 31, 32, 131, 132) can be fed. DOLLAR A The inventive method is characterized by the following process steps: DOLLAR A - supplying a filter sleeve (11) having a filter element in the center of the filter sleeve (19), DOLLAR A - insertion of filter material (20, 26, 27, 30 116) forming, in predetermined portions into the filter sleeve (11) of at least a first side, so that (at least in a first part of the filter cartridge 11) filter segments (19, 20, 26, 27, 30). DOLLAR A The inventive device is characterized by a processing station comprising a rotating device (108, 129) for turning the filter sleeves (11). Furthermore, the invention corresponding filter sleeves and the use of appropriate pre filter sleeves relates.