Cutting tool, and a method for cutting a web or sheet of material

Patent metadata

Field	Value
Publication number	US-10751901-B2
Application number	US-201716301570-A
Country	US
Kind code	B2
Filing date	May 15, 2017
Priority date	May 16, 2016
Publication date	Aug 25, 2020
Grant date	Aug 25, 2020

Abstract

The present invention relates to a cutting tool (100) for providing holes in a core material layer (10). The cutting tool (100) comprises a cutting knife (110) having a cutting edge (112) configured to cut through the core material layer (10), and a support structure (120) onto which the cutting knife (110) is attached, wherein the support structure (120) is at least partly formed by an elastic material.

First claim

The invention claimed is:

1. A cutting system comprising:
a plurality of cutting devices, each cutting device comprising:
a cutting roller,
a cutting knife including a cutting edge configured to cut through a core material layer, and
a support structure onto which the cutting knife is attached, wherein the support structure comprises an elastic member at least partly formed by an elastic material and a rigid support plate, said elastic member being arranged between the rigid support plate and the cutting knife, and wherein the rigid support plate forms a core cylinder of said cutting roller; and

an anvil configured to support the core material layer and to engage with the plurality of cutting devices during use, wherein said anvil forms part of an anvil roller,
wherein the cutting devices are arranged along a circumference of said anvil roller.

2. The cutting system according to claim 1 , wherein the cutting knife comprises a rigid base member from which the cutting edge extends.

3. The cutting system according to claim 1 , wherein the cutting edge extends along a closed path.

4. The cutting system according to claim 3 , wherein said closed path has a circular shape.

5. The cutting system according to claim 1 , wherein said cutting knife is arranged at an outer circumference of said cutting roller.

6. The cutting system according to claim 5 , wherein a plurality of cutting knives is arranged along the outer circumference of said cutting roller.

7. The cutting system according to claim 1 , wherein said anvil is formed by a rigid material.

8. The cutting system according to claim 1 , wherein at least one cutting device of the plurality of cutting devices is moveable radially relative to said anvil roller.

9. A method for providing a core material layer with a through hole, comprising:
arranging a core material layer onto a support surface of a rigid anvil, and
pressing a circumferential cutting edge of a cutting tool against said core material layer such that a support structure is deformed while the core material layer is cut, the support structure comprising an elastic member and a rigid support plate, said elastic member being arranged between the rigid support plate and the cutting tool, wherein the rigid support plate forms a core cylinder of a cutting roller.

10. A method for providing a packaging material, comprising:
providing a core material layer,
providing said core material layer with at least one through hole by performing the method according to claim 9 , and
providing the cut core material layer with at least one polymeric layer.

11. The method according to claim 10 , wherein the at least one polymeric layer is laminated to the cut core material layer.

12. The method according to claim 11 , wherein the at least one polymeric layer is laminated to the cut core material layer across substantially entire surface of the cut core material layer.

13. The method according to claim 10 , wherein the at least one polymeric layer comprises a first polymeric layer provided on a first side of the cut core material layer and a second polymeric layer provided on a second side of the cut core material layer, the second side opposite the first side.

Assignees

• Tetra Laval Holdings & Finance

Inventors

• Benkö Gabor

Classifications

• B26F2001/4409

  having die balancing or compensating means · CPC title

• B26F1/18

  Perforating by slitting, i.e. forming cuts closed at their ends without removal of material · CPC title

• B26F1/08

  wherein the tools are carried by, and in operation move relative to, a rotative drum or similar support · CPC title

• B26F1/02

  Perforating by punching, e.g. with relatively-reciprocating punch and bed · CPC title

• B26F1/20

  with tools carried by a rotating drum or similar support (B26F1/22 takes precedence) · CPC title