| 摘要 |
A method and related machine for wrapping filter-bags (1) in sealed outer envelopes (S) comprises the following steps: feeding single, plane sheets (6) to a station (7) for wrapping each sheet (6) over a corresponding filter bag (1); folding the sheet (6) into a U-shape about a transversal axis (X) of the sheet (6) itself so as to form at least two opposite wings (6a, 6b) between which the filter bag (1) is placed; rolling the longitudinal edges (8a, 8b) of the U-shaped sheet (6) so as to flatten them; and, lastly, joining at least the longitudinal edges (8a, 8b) of the U-shaped sheet (6) to form a sealed outer envelope (S) around the filter bag (1).
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