초록 ▼

A packing method and unit (11) for folding a sheet (3) of packing material about a group (2) of cigarettes, and having: a first packing conveyor (12) having a first pocket (14) for receiving the group (2) wrapped in the tubular-folded sheet (3) of packing material; a second packing conveyor (18) hav

A packing method and unit (11) for folding a sheet (3) of packing material about a group (2) of cigarettes, and having: a first packing conveyor (12) having a first pocket (14) for receiving the group (2) wrapped in the tubular-folded sheet (3) of packing material; a second packing conveyor (18) having a second pocket (20) for receiving the group (2) wrapped in the tubular-folded sheet (3) of packing material; and a transfer device (24) which transfers the group (2), wrapped in the tubular-folded sheet (3) of packing material, from the first pocket (14) to the second pocket (20), and has a pusher (26) located at the first pocket (14) and engaging a first base wall (4) of the group (2), and a counter-pusher (27) located at the second pocket and engaging a second base wall (4), opposite the first base wall (4), of the group (2); the pusher (26) and/or the counter-pusher (27) of the transfer device (24) having respective lateral appendixes (28) which engage minor lateral walls (6) of the group (2), when the pusher (26) and counter-pusher (27) rest on the respective base walls (4) of the group (2), to fold portions (9) of the tubular sheet (3) of packing material onto the minor lateral walls (6) of the group (2).

대표청구항 ▼

1. A packing unit for folding a sheet (3) of packing material about an article, such as a group (2) of cigarettes, and comprising: a first packing conveyor (12) having a first pocket (14) for receiving the group (2) wrapped in the tubular-folded sheet (3) of packing material;a second packing conveyo

1. A packing unit for folding a sheet (3) of packing material about an article, such as a group (2) of cigarettes, and comprising: a first packing conveyor (12) having a first pocket (14) for receiving the group (2) wrapped in the tubular-folded sheet (3) of packing material;a second packing conveyor (18) having a second pocket (20) for receiving the group (2) wrapped in the tubular-folded sheet (3) of packing material; anda transfer device (24) which transfers the group (2), wrapped in the tubular-folded sheet (3) of packing material, from the first pocket (14) to the second pocket (20), and comprises a pusher (26) located at the first pocket (14) and engaging a first base wall (4) of the group (2); and a counter-pusher (27) located at the second pocket and engaging a second base wall (4), opposite the first base wall (4), of the group (2);the packing unit being characterized in that the pusher (26) and/or the counter-pusher (27) of the transfer device (24) comprise respective lateral appendixes (28) which engage minor lateral walls (6) of the group (2), when the pusher (26) and counter-pusher (27) rest on the respective base walls (4) of the group (2), to fold portions (9) of the tubular sheet (3) of packing material onto the minor lateral walls (6) of the group (2). 2. A packing unit as claimed in claim 1, wherein the pusher (26) and counter-pusher (27) of the transfer device (24) comprise respective end walls (29), each of which is parallel to and faces a respective base wall (4) of the group (2), rests on the respective base wall (4) during transfer, and is flanked by the two corresponding lateral appendixes (28). 3. A packing unit as claimed in claim 2, wherein each lateral appendix (28) projects from the respective end wall (29) towards the other end wall (29). 4. A packing unit as claimed in claim 1, wherein each lateral appendix (28) is substantially parallelepiped-shaped with a rectangular base. 5. A packing unit as claimed in claim 1, wherein each lateral appendix (28) is substantially parallelepiped-shaped with a triangular base. 6. A packing unit as claimed in claim 1, wherein each lateral appendix (28) is substantially truncated-pyramid-shaped with a triangular base. 7. A packing unit as claimed in claim 1, each lateral appendix (28) has a folding wall (30) which holds the respective portion (9) folded down, is flat, is parallel to a transfer direction (25), and is perpendicular to the corresponding base wall (4) of the group (2). 8. A packing unit as claimed in claim 1, wherein each lateral appendix (28) has a folding wall (30) which holds the respective portion (9) folded down, is flat, forms an acute angle with a transfer direction (25), and forms an obtuse angle with the corresponding base wall (4) of the group (2). 9. A packing unit as claimed in claim 1, wherein the lateral appendixes (28) are designed so that flaps (10) of open lateral ends (8) of the tubular sheet (3) of packing material can be folded over the lateral appendixes (28); and the second packing conveyor (18) comprises folding devices (22, 23) for folding the flaps (10) of the open lateral ends (8) of the tubular sheet (3) of packing material over the lateral appendixes (28), which are not withdrawn from the group (2) until the flaps (10) are at least partly folded. 10. A packing method for folding a sheet (3) of packing material about an article, such as a group (2) of cigarettes, and comprising the steps of: folding the sheet (3) of packing material into a tube about the group (2);forward-feeding the group (2), wrapped in the tubular-folded sheet (3) of packing material, by means of a first packing conveyor (12) having a first pocket (14); andtransferring the group (2), wrapped in the tubular-folded sheet (3) of packing material, from the first pocket (14) of the first packing conveyor (12) to a second pocket (20) of a second packing conveyor (18) by means of a transfer device (24), which comprises a pusher (26) located at the first pocket (14) and engaging a first base wall (4) of the group (2); and a counter-pusher (27) located at the second pocket and engaging a second base wall (4), opposite the first base wall (4), of the group (2);the packing method being characterized by comprising the further step of engaging minor lateral walls (6) of the group (2) by means of respective lateral appendixes (28) of the pusher (26) and/or counter-pusher (27), when the pusher (26) and counter-pusher (27) rest on the respective base walls (4) of the group (2), so as to fold portions (9) of the tubular sheet (3) of packing material onto the minor lateral walls (6) of the group (2).