Packaging machine and method for producing a packaging unit as well as a packaging unit made of packaging sleeves and an outer packaging

1. A packaging machine for producing a packaging unit from a packaging sleeve group comprising a plurality of flat folded, upright, packaging sleeves, and an outer packaging, the packaging machine comprising at least one conveyer unit for conveying the packaging sleeve group, at least one outer packaging unit for preparing an outer packaging-shaping sheet material in a base position, a sealing unit for sealing of the outer packaging-shaping sheet material enclosed in the packaging sleeve group, and holding plates for laterally pressing together the packaging sleeve group, the holding plates each being moveably suspended on a rail in a direction of transport of the conveyer unit,

wherein, in the base position, the sheet material is stretched across the conveyer unit such that the sheet material is stretched above and below the conveyer unit and the sealing unit is positioned downstream of the outer packaging-shaping sheet material in the direction of transport of the conveyer unit,

wherein the at least one conveyor unit conveys the packaging sleeve group in the direction of transport,

at least one sheet material brake for securing the outer packaging-shaping sheet material arranged, at least in the base position, upstream of the sealing unit in the direction of transport, and

a heat treatment unit downstream of the at least one outer packaging unit to apply protruding sheet material to downstream sides of the packaging sleeve group.

2. The packaging machine according to claim 1 , wherein the sealing unit comprises a pair of sealing jaws.

3. The packaging machine according to claim 1 , wherein the sealing unit is formed as a sealer and a cutter, wherein the sealer and the cutter comprises sealing surfaces and a cutting device.

4. The packaging machine according to claim 3 , wherein the sealing surfaces each comprise a welding section adapted to seal the sheet material at a zone of contact between the sealing surfaces and the sheet material.

5. The packaging machine according to claim 1 , wherein the packaging machine comprises a support for preparing the packaging sleeve group and for at least partially conveying the packaging sleeve group through the packaging machine.

6. The packaging machine according to claim 1 , wherein the at least one outer packaging unit comprises a pair of feed rollers with wound sheet material, wherein the pair of feed rollers are arranged on two opposite sides relative to the packaging sleeve group.

7. The packaging machine according to claim 1 , wherein the heat treatment unit has a plurality of hot air nozzles.

8. A method for producing a packaging unit from a packaging sleeve group comprising a plurality of flat folded, upright, packaging sleeves, and an outer packaging, with a packaging machine according to claim 1 , by the following steps:

preparing the packaging sleeve group,

spreading a sheet material in a base position,

conveying the packaging sleeve group in the direction of transport of the conveyor unit of the packaging machine, through spread sheet material, wherein the sheet material is pre-stressed,

passing the packaging sleeve group through the sealing unit of the packaging machine arranged downstream of the sheet material in the base position,

sealing the sheet material by means of the sealing unit,

separating the sealed sheet material in a sealed area, and

applying heat to protruding ends of the sheet material.

9. The method according to claim 8 , wherein sealing of the sheet material is achieved by means of joining.

10. The method according to claim 8 , wherein sealing jaws of the sealing unit move towards each other to seal the sheet material.

11. The method according to claim 9 , wherein sealing surfaces of the sealing jaws seal the sheet material by means of heating.

12. The method according to claim 8 , wherein the sealed sheet material is separated by means of a cutting device formed in the sealing unit.

13. The method according to claim 9 , wherein after the sealing of the sheet material or after the separating of the sealed sheet material, the sealing jaws move back towards each other.

14. The method according to claim 8 , wherein after a pre-determined conveying of the packaging sleeve group through the sheet material, the sheet material is slowed, so that corners of the packaging sleeve group are fixed by the sheet material.