Claims
- 1. A device for packaging a web roll having a longitudinal axis with a packaging sheet comprising:
- a packaging sheet dispenser that dispenses the packaging sheet such that a lateral width of the packaging sheet forms an acute angle to the longitudinal axis; and
- a glue application station comprising a first glue application device composed of an operational gluing device and a second glue application device composed of an end gluing device, which is adapted to supply glue having a higher initial adhesion than glue supplied by the operational gluing device.
- 2. The device in accordance with claim 1, the operational gluing device having an output that produces at least two glue beads running substantially parallel to edges of the packaging sheet.
- 3. The device in accordance with claim 2, the operational gluing device is positioned to arranged the glue beads adjacent to the edges of the packaging sheet.
- 4. The device in accordance with claim 1, further comprising a control device coupled to the glue application station, the control device controlling the application of glue by the operational gluing device in accordance with a dispensing speed of the packaging sheet.
- 5. The device in accordance with claim 1, the end gluing device having an output that produces a two-dimensional application of glue.
- 6. The device in accordance with claim 1, the end gluing device comprising a glue spraying device.
- 7. The device in accordance with claim 6, the glue spraying device having a nozzle that substantially sprays glue over a width of the packaging sheet.
- 8. A method for preparing a packaging sheet for helical wrapping around a rotating material web roll, the method comprising:
- feeding the packaging sheet through a gluing station;
- applying at least one glue bead parallel to an edge of the packaging sheet;
- spraying glue having a higher initial adhesion than glue of the at least one glue bead onto at least a portion of the packaging sheet; and
- guiding the packaging sheet onto an outer surface of the material web roll.
- 9. The method in accordance with claim 8, the applying of the at least one glue bead comprising:
- depositing a plurality of drops onto a surface of the packaging sheet in accordance with a feeding speed of the packaging sheet.
- 10. The method in accordance with claim 9, the at least one glue bead comprising two edge glue beads, and the method further comprising:
- applying the two edge glue beads adjacent opposite edges of the packaging sheet.
- 11. The method in accordance with claim 10, the spraying of glue onto the at least a portion of the packaging sheet comprising:
- spraying a layer of glue between the two edge glue beads.
- 12. The method in accordance with claim 11, the at least a portion of the packaging sheet comprising a front edge and a rear edge of the packaging sheet.
- 13. The method in accordance with claim 8, the spraying of glue onto the at least a portion of the packaging sheet comprising:
- spraying a layer of glue along a limited longitudinal extent of the packaging sheet.
- 14. The method in accordance with claim 13, the limited longitudinal extent of the packaging sheet comprising a front edge and a rear edge of the packaging sheet.
- 15. The method in accordance with claim 8, further comprising:
- pressing the packaging sheet against the circumference of the material web roll.
- 16. The method in accordance with claim 15, the pressing of the packaging sheet comprising:
- forming a first nip between the material web roll and a first support roll;
- forming a second nip between the material web roll and a second support roll; and
- guiding the packaging sheet between the first and second nips.
- 17. The method in accordance with claim 16, wherein the first and second nip are separated by a predetermined distance, and
- wherein a longitudinal extent of the at least a portion of the packaging sheet is substantially the same as the predetermined distance.
- 18. The method in accordance with claim 8, further comprising:
- controlling the applying of the at least one glue bead in accordance with a rotational speed of the material web roll.
- 19. The method in accordance with claim 8, the applying of the at least one glue bead comprising substantially evenly depositing drops of glue along a longitudinal extent of the packaging sheet.
- 20. The method in accordance with claim 19, the feeding of the packaging sheet comprising variably adjusting a feed rate.
- 21. The method in accordance with claim 20, wherein the feed rate is slower for the front and rear ends of the packaging sheet than for the portion of the packaging sheet between the front and rear ends.
- 22. The device in accordance with claim 1, wherein the end gluing device is actuatable at both ends of the material web roll.
- 23. The method in accordance with claim 8, the spraying of the glue onto at least a portion of the packaging sheet comprising spraying the glue onto a leading edge portion and a trailing edge portion of the packaging sheet.
- 24. The method in accordance with claim 23, further comprising disabling the spraying of the glue between the leading edge portion and the trailing edge portion.
- 25. A device for packaging a web roll having a longitudinal axis with a packaging sheet comprising:
- a packaging sheet dispenser that dispenses the packaging sheet such that a lateral width of the packaging sheet forms an acute angle to the longitudinal axis;
- a glue application station comprising a first glue application device composed of an operational gluing device and a second glue application device composed of an end gluing device;
- a timing device supplying clock pulses; and
- the operational gluing device receiving the clock pulses and dispensing glue in the form of drops in response to the receipt of the clock pulses.
- 26. The device in accordance with claim 25, wherein at least one of a time interval and a size of the drops is variable in accordance with of a dispensing speed of the packaging sheet.
- 27. The device in accordance with claim 25, the operational gluing device dispensing the drops of glue on the packaging sheet with an at least approximately constant spacing.
Priority Claims (1)
Number |
Date |
Country |
Kind |
196 52 449 |
Dec 1996 |
DEX |
|
CROSS-REFERENCE TO RELATED APPLICATION
The present application claims priority under 35 U.S.C. .sctn. 119 of German Patent Application No. 196 52 449.0 filed Dec. 17, 1996, the disclosure of which is expressly incorporated by reference herein in its entirety.
US Referenced Citations (5)
Foreign Referenced Citations (2)
Number |
Date |
Country |
1009556 |
May 1957 |
DEX |
195 35 746 |
Apr 1997 |
DEX |