Method of closing a flexible packaging, a device for this purpose and a closed flexible packaging
The invention relates to a method of closing an access side of a flexible packaging using a planar closure ( 15 ) made of plastic, the closure ( 15 ) comprising a slot ( 20 ) delimited by limb parts ( 215 ) and extending between the circumference of the closure and an opening ( 10 ), said method comprising the step of introducing the access side of the flexible packaging into the opening ( 10 ) of the closure ( 15 ) and the method comprising a subsequent step in which the slot ( 20 ) is at least partially sealed by means of a seal ( 30 ), which connects the limb parts ( 215 ) to one another, without substantially deforming the closure.
1. Method of closing an access side of a flexible packaging using a planar closure made of plastic, the closure comprising a receiving opening for receiving and retaining the access side of the flexible packaging, as well as a slot delimited by limb parts of the closure and extending between the circumference of the closure and the receiving opening, said method comprising the step of introducing the access side of the flexible packaging into the receiving opening of the closure, and a subsequent step wherein the slot is at least partially sealed by means of a seal which connects the limb parts to one another without substantially deforming the closure and the seal.
2. Method according to claim 1 , in which the slot is sealed by the limb parts of the closure being stuck together.
3. Method according to claim 2 , in which, during the subsequent step, flowable adhesive is applied to the limb parts and forms the seal once it has set.
4. Method according to claim 2 , in which at least one limb part of the closure adjacent to the slot is provided with a solid adhesive, said solid adhesive is made to flow into the slot during the subsequent step and forms the seal once it has set.
5. Method according to claim 3 or 4 , in which the adhesive is of a color which is different from that of the closure.
6. Method according to claim 3 or 4 , in which the adhesive has a lower flow temperature than the material from which the closure is made.
7. Method according to claim 3 or 4 , in which the subsequent step comprises supplying heat in order to make the adhesive flow.
8. Method according to claim 1 , in which the slot is sealed by applying an adhesive object on at least part of the slot and on part of the closure surrounding the slot.
9. Method according to claim 1 , in which the subsequent step is carried out in such a way that the resulting seal is less strong than the planar closure.
10. Method according to claim 1 , in which the opening is provided in the centre of the surface of the closure.
11. Device for closing an access side of a flexible packaging using a planar closure made of plastic, the closure comprising a receiving opening for receiving and retaining the access side of the flexible packaging, as well as a slot extending between the circumference of the closure and the receiving opening, the device comprising a conveying element for introducing the access side of the flexible packaging into the receiving opening of the closure, the device comprising a sealing unit for at least partially sealing the slot of the closure by means of a seal, in such a manner that the limb parts are connected to one another without deforming the closure and the seal.
12. Device according to claim 11 , in which the sealing unit comprises a heat source.
13. Device according to claim 11 , in which the sealing unit comprises a dispensing unit for adhesive objects and a pressing means.
14. Device according to claim 11 , in which the sealing unit comprises a metering unit for dispensing adhesive.
15. Device according to claim 11 , in which the sealing unit is movably connected to the device by means of an arm.