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

Patent metadata

Field	Value
Publication number	US-10850422-B2
Application number	US-201716302041-A
Country	US
Kind code	B2
Filing date	May 15, 2017
Priority date	May 16, 2016
Publication date	Dec 1, 2020
Grant date	Dec 1, 2020

Abstract

The present disclosure relates to a cutting system for providing holes in a core material layer. The cutting system has a cutting tool having a cutting knife configured to cut through the core material layer, and an anvil having a rigid support surface for receiving the cutting knife of the cutting tool. The cutting system further has an elastic member that is positioned to absorb at least a part of a force applied when the cutting tool is pressed against said anvil.

First claim

The invention claimed is:

1. A cutting system for providing holes in a core material layer, comprising:
a cutting tool having a cutting knife configured to cut through the core material layer, wherein a cutting edge of the cutting knife extends to a common plane;
an anvil having a rigid support surface configured to receive the cutting knife of the cutting tool;
wherein the cutting system further comprises an elastic member positioned to absorb at least a part of a force applied when the cutting tool is pressed against said anvil;
wherein the rigid support surface of said anvil is arranged onto said elastic member;
wherein the cutting knife is arranged on an outer surface of a cutting roller and the anvil is arranged on an outer surface of an anvil roller; and
wherein the rigid support surface of said anvil comprises a radius with a center that does not coincide with a center of a radius of the outer surface of the anvil roller.

2. The cutting system according to claim 1 , wherein the cutting knife extends from a rigid knife support of said cutting tool.

3. The cutting system according to claim 2 , wherein said rigid knife support of said cutting tool is arranged onto a knife support elastic member.

4. The cutting system according to claim 1 , wherein said cutting knife extends along a closed path.

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

6. The cutting system according to claim 1 , wherein the elastic member is made of rubber.

7. The cutting system according to claim 1 , wherein the rigid support surface of the anvil is convex.

8. The cutting system according to claim 1 , wherein the cutting roller is positioned relative the anvil roller such that the elastic member is compressed when the cutting knife contacts the rigid support surface of the anvil.

9. The cutting system according to claim 8 , wherein the elastic member is compressed by 0.02-0.1 mm when the cutting knife contacts the rigid support surface of the anvil.

10. A method for providing a core material layer with a through hole, comprising:
arranging a core material layer onto a rigid support surface of an anvil that is arranged on an outer surface of an anvil roller, the anvil positioned over only a portion of a circumference of the anvil roller and the rigid support surface of the anvil arranged onto an elastic member; and
pressing a cutting knife of a cutting tool that is arranged on an outer surface of a cutting roller against said core material layer such that the cutting knife comes into contact with the rigid support surface of the anvil when the core material layer is cut, whereby the anvil elastically deforms when the cutting knife comes into contact with the rigid support surface, and wherein a cutting edge of the cutting knife extends to a common plane.

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

12. The cutting system according to claim 3 , wherein the elastic member and knife support elastic member are made of rubber.

13. The cutting system according to claim 8 , wherein the elastic member is compressed by 0.06-0.08 mm when the cutting knife contacts the rigid support surface.

14. The cutting system of claim 1 , wherein the common plane is spaced away from the outer surface of the cutting roller.

15. The cutting system of claim 1 , wherein the common plane is parallel to an axis extending through a center of the cutting roller.

Assignees

• Tetra Laval Holdings & Finance

Inventors

• Mårtensson Ulf
• Bergman Seppo
• Robertsson Dan

Classifications

• B26F2001/4472

  Cutting edge section features · CPC title

• B26F1/20

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

• B26F1/02

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

• B26F1/44

  Cutters therefor; Dies therefor · CPC title

• B26F1/384 Primary

  using rotating drums · CPC title