| 摘要 |
A machine for making filter bags for products for infusion, made starting with a flat tubular envelope comprises a station for application of a thread with seal and pick-up tab to the tubular envelope, the station comprising a first drum which rotates in a defined direction of rotation, having a plurality of seats for the positioning and pick up of the seals, continuous thread and pick-up tabs fed from three feed units, located downstream of one another relative to the direction of rotation of the first drum; the seal and pick-up tab feed units are supplied with continuous webs which are fed towards relative cutting elements, which cut the webs into individual seals and, respectively, individual pick-up tabs; the two feed units comprise corresponding transfer means, operating between the corresponding cutting element and the first drum, picking up the individual seals and individual pick-up tabs in a first zone at the cutting elements and transferring them to a second zone separated from the first zone by a given angle and at a seat on the drum.
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