Systems and methods for forming corrugated boards with ultrasound

Patent metadata

Field	Value
Publication number	US-11724476-B2
Application number	US-202117474933-A
Country	US
Kind code	B2
Filing date	Sep 14, 2021
Priority date	Feb 23, 2021
Publication date	Aug 15, 2023
Grant date	Aug 15, 2023

Abstract

Systems and methods for forming corrugated boards are disclosed. The system includes a single face unit configured to form a single face board having a fluted layer and an outer liner. The system also includes a single face buffer configured to store or hold a length of the single face board. The system has a glue station configured to attach a second outer liner to the single face board to form a single wall board. The system also has an ultrasonic unit configured to apply ultrasonic vibrations to the single wall board. The ultrasonic vibrations are configured to remove moisture from the single wall board, activate, heat, and/or dry an adhesive used to attach the fluted layer and the outer liners, and/or cause the fibers of the fluted layer and the outer liners to weave, intertwine, or otherwise stick together.

First claim

What is claimed is:

1. A system for forming corrugated boards, the system comprising:
a single face unit configured to form a single face board having a fluted layer and an outer liner;
a single face buffer configured to store or hold a length of the single face board;
a glue station configured to attach a second outer liner to the single face board to form a single wall board, the glue station being configured to apply an adhesive to the second outer liner or the single face board and press together the second outer liner and the single face board with the adhesive therebetween; and
an ultrasonic unit configured to apply ultrasonic vibrations to at least one of the single face board or the single wall board, the ultrasonic vibrations being configured to remove moisture from the single face board or the single wall board and/or dry the adhesive used to attach the second outer liner and the single face board after the second outer liner is attached to the single face board at the glue station, and/or cause the fibers of the fluted layer and one or more of the outer liners to weave or intertwine together, the ultrasonic unit being positioned downstream of the glue station.

2. The system of claim 1 , wherein the single face unit comprises a set of fluting rollers configured to fold a sheet material into the fluted layer, wherein the fluting rollers comprise mating peaks and valleys that are configured to fold the sheet material such that the fluted layer has alternating peaks and valleys.

3. The system of claim 2 , wherein the single face unit further comprises a pressure roller, the pressure roller and at least one of the fluting rollers being configured to press the fluted layer and the outer liner layer together to form the single face board.

4. The system of claim 1 , wherein the single face unit comprises an adhesive applicator that is configured to apply an adhesive to at least one of the fluted layer or the outer liner of the single face board, the adhesive being configured to attach the fluted layer and the outer liner layer together.

5. The system of claim 1 , wherein the single face buffer comprises one or more pulleys about which the single face board can extend.

6. The system of claim 5 , wherein at least one of the one or more pulleys is mounted on a moveable carriage.

7. The system of claim 6 , wherein movement of the moveable carriage is configured to increase or decrease a length of a track in the single face buffer, wherein the length of the track is related to the length of the single face board that can be stored or held in the system.

8. The system of claim 1 , further comprising a folding unit configured to fold the single wall board into a stack or bale.

9. The system of claim 8 , further comprising a creasing unit configured to form creases in the single wall board, the creasing extending along at least a portion of a width of the single wall board and being spaced apart at even intervals along the length of the single wall board.

10. The system of claim 9 , further comprising a cutting unit configured to cut the single wall board along a length or width thereof.

11. The system of claim 10 , wherein the ultrasonic unit is disposed downstream of the glue station and upstream of the at least one of the cutting unit, the creasing unit, or the folding unit, such that the single wall board passes through the ultrasonic device after passing through the glue station and before passing through the at least one of the cutting unit, the creasing unit, or the folding unit.

12. An apparatus for forming corrugate boards, the system comprising:
a single face unit configured to form a single face board having a fluted layer and an outer liner;
a glue station configured to receive the single face board and another sheet material, the glue station being further configured to:
selectively attach the another sheet material to the single face board to form a single wall board by applying an adhesive to the another sheet material or the single face board and press together the another sheet material and the single face board with the adhesive therebetween; and
selectively advance the single face board therethrough without attaching the another sheet material to the single face board; and

an ultrasonic unit configured to apply ultrasonic vibrations to the single face board or the single wall board, the ultrasonic vibrations being configured to remove moisture from the single face board or the single wall board and/or dry the adhesive used to attach layers thereof after the another sheet material is attached to the single face board at the glue station, and/or cause the fibers of the single face board or the single wall board to weave or intertwine together, the ultrasonic unit being positioned downstream of the glue station.

13. The apparatus of claim 12 , further comprising a single face buffer configured to store or hold a length of the single face board.

14. The apparatus of claim 13 , wherein the single face buffer is selectively adjustable to hold different lengths of the single face board.

15. The apparatus of claim 12 , wherein the single face unit is configured to apply an adhesive to the fluted layer or the outer liner to facilitate attachment between the fluted layer and the outer liner.

16. A method for forming corrugated boards, the method comprising:
forming a fluted layer from a first sheet material;
attaching the fluted layer to an outer liner to form a single face board, attaching the fluted layer to the outer liner comprising applying an adhesive to at least one of the fluted layer or the outer liner and pressing the fluted layer and the outer liner together;
attaching a second outer liner to the single face board to form a single wall board, attaching the second outer liner to the single face board comprising applying an adhesive to at least one of the single face board or the second liner and pressing the single face board and the second outer liner together; and
after attaching the second outer liner to the single face board to form the single wall board, applying ultrasonic vibrations to the first single wall board to release moisture therefrom.

17. The method of claim 16 , further comprising holding a length of the single face board in a single face buffer prior to attaching the second liner thereto.

18. The method of claim 17 , further comprising adjusting the length of the single face board that is held in the single face buffer.

19. The method of claim 16 , further comprising forming creases in the single wall board.

20. The method of claim 19 , further comprising folding the single wall board at the creases and stacking the single wall board in a stack.

Assignees

• Packsize Llc

Inventors

• Kiessner Hanko

Classifications

• B31F1/2881

  for bringing a second facer sheet into contact with an already single faced corrugated web · CPC title

• B31F1/2877

  Pressing means for bringing facer sheet and corrugated webs into contact or keeping them in contact, e.g. rolls, belts · CPC title

• B31F5/04 Primary

  by exclusive use of adhesives · CPC title

• B31F1/225

  combined with uniting the corrugated web to flat webs; Making corrugated-web structures · CPC title

• B31F1/36

  Moistening and heating webs to facilitate mechanical deformation and drying deformed webs {(during corrugating B31F1/28)} · CPC title