| 摘要 |
<p>The present invention relates to a multiple format machine (1) for sacking individual or collectively grouped products (2) fed in succession in a tubular wrapping made of packaging film. The wrapping (3) is obtained by means of progressive folding operations on a planar, continuous strip of packing film effected in such a way as to obtain a tubular shape having superposed longitudinal edges (4, 5) and by means of successive sealing operations (6, 7). One (6) of such seals, effected by transverse sealing (13), is oriented transversely to the tubular form, and encloses a front end thereof (8); the other seal (7) being effected longitudinally to the tubular shape by related sealing means (9) to connect its longitudinal edges (4, 5). The sealing means (9) for the longitudinal sealing are movable in translation longitudinally to the wrapping (3) in order to effect the longitudinal sealing (7) of the edges (4, 5) at a selectively variable distance from the transverse seal (6) of the front end (8) of the wrapping (3). <IMAGE></p> |
