There is described a pack (1) of tissue paper products (R) comprising a plurality of products wrapped in a plastic film (F), wherein said plastic film presents a device for opening and closing the pack.
B65B 25/14 - Packaging paper or like sheets, envelopes, or newspapers, in flat, folded, or rolled form
B65B 61/18 - Auxiliary devices, not otherwise provided for, for operating on sheets, blanks, webs, binding material, containers or packages for applying or incorporating package-opening or unpacking elements, e.g. tear-strips
B65D 75/58 - Opening or contents-removing devices added or incorporated during package manufacture
2.
IMPROVED DEVICE FOR THE FORMATION OF GROUPS OF RODUCTS IN SEVERAL LAYERS
The device comprises: a stacking surface (3) movable in a substantially vertical direction, on which the layers (S1-S3) of superposed products to be packaged are arranged; a pair of conveyors (7, 9) substantially superposed to feed said layers to the stacking surface; a compacting wall (11), positioned approximately orthogonal to the direction of feed of the conveyors and therebelow. The lowering movement of the moving surface carries the layer or layers deposited thereon approximately to the height of the compacting wall, which compacts the products.
The device comprises a stacking surface (3) movable in a substantially vertical direction, on which layers (S1, S2, S3) of products (P) to be packaged are superposed, and a pair of conveyors (7, 9) substantially superposed to feed the layers of products to the stacking surface. The device also comprises a pair of walls (31 A, 31 B) substantially parallel, and substantially vertical, between which the layers of products are inserted by the conveyors when they are stacked on the stacking surface. The walls move reciprocally towards and away from each other to take a position of greater reciprocal distance, in which they do not interfere with the products deposited on the stacking surface, and a position of lesser reciprocal distance, in which they interfere with the products inserted therebetween.
The device for packaging groups of products (R) in a heat-sealable plastic film (F) comprises: a path for feed of the groups of products; and, in sequence along said path, folding members (17; 19; 25, 29) for folding in sequence four flaps of the plastic film projecting from the group of products in a direction transverse to the direction of feed of the group of products along said path of feed. Along the path of feed and on each side thereof, there develops a respective contrast element (19) that inserts itself between the group of products and at least one pair of folded and superimposed flaps. Said contrast element co-operates with a sealing assembly that carries out mutual heat- sealing of said two superimposed flaps.
B65B 11/42 - Wrapping articles, or quantities of material, by conveying wrapper and contents in defined paths in a combination of straight and curved paths to fold the wrappers in tubular form about contents and then to form closing folds of similar form at opposite ends of the tube
B65B 25/14 - Packaging paper or like sheets, envelopes, or newspapers, in flat, folded, or rolled form
5.
Device and method for changing automatically the size of packs in a conveyor, in particular for an automatic packaging machine
A conveyor device, in particular for an automatic packaging machine for paper rolls, having a horizontal plane of advance, at least one pair of motorized flexible transmission members extending along a closed loop and bearing a plurality of transverse bars fastened to said flexible transmission members, a plurality of thruster elements borne by said bars, and a stationary adjustment station provided with at least one adjustment assembly having a grip organ movable in transverse direction and arranged in such a way as to displace in the transverse direction along the respective bar a thruster element positioned at the grip organ.
patents
