Tensioning device for rotary cutting apparatus

Patent metadata

Field	Value
Publication number	US-9943977-B2
Application number	US-201314776474-A
Country	US
Kind code	B2
Filing date	Mar 14, 2013
Priority date	Mar 14, 2013
Publication date	Apr 17, 2018
Grant date	Apr 17, 2018

Abstract

A rotary cutting apparatus including a frame, a die roll rotatably attached to the frame including a cutting member, wherein the cutting member includes at least one tensioning device and the tensioning device includes a body and a tip portion adjacent to the body, the tensioning device having an unsymmetrical profile.

First claim

The invention claimed is:

1. A rotary cutting apparatus arranged to cut a material fed in a machine direction along a cross-direction, the cross-direction comprising a material feed path oriented at an oblique angle relative to the axis of the rotary cutting apparatus, the cutting apparatus comprising:
a frame; and
a die roll rotatably attached to the frame including a cutting member, the die roll including at least one tensioning device affixed to the die roll, wherein the at least one tensioning device comprises a body and a tip portion adjacent to the body, wherein the at least one tensioning device, attached to the die roll, has an unsymmetrical profile positioned to create tension on the material;
wherein the device comprises at least one vacuum orifice extending from the tip through the base of the device.

2. The apparatus of claim 1 , further comprising an anvil roll rotatably attached to the frame.

3. The apparatus according to claim 1 , further comprising at least one insert.

4. The apparatus according to claim 3 , wherein the at least one tensioning device is attached to the insert.

5. The apparatus of according to claim 1 , wherein the tensioning device is a polymer selected from the group of latex, gum and polyurethane.

6. The apparatus according to claim 1 , wherein the thickness of the tip portion is less than that of the body.

7. The apparatus according claim 1 , wherein the thickness of the tip portion is about 0.1 cm to about 3.0 cm.

8. The apparatus according to claim 1 , wherein the thickness of the base is greater than that of the body and the tip portion.

9. A rotary cutting apparatus arranged to cut a material fed in a machine direction along a cross-direction, the cross-direction comprising a material feed path oriented at an oblique angle relative to the axis of the rotary cutting apparatus, the cutting apparatus comprising:
a frame; and
a die roll rotatably attached to the frame including a cutting member, the die roll including at least one tensioning device affixed to the die roll, wherein the at least one tensioning device comprises a body and a tip portion adjacent to the body, wherein the at least one tensioning device, attached to the die roll, has an unsymmetrical profile positioned to create tension on the material; and
wherein the device comprises at least one vacuum orifice extending from the tip through the base of the device.

10. A rotary cutting for cutting a feed of material comprising:
a frame; and
a die roll rotatably attached to the frame including a cutting member;
at least one tensioning device affixed to the die roll, wherein the at least one tensioning device comprises a body and a tip portion adjacent to the body, wherein the at least one tensioning device, has an unsymmetrical profile and is configured to deform laterally during cutting to create tension in a material in a direction at an oblique angle relative to a direction by which the material is fed to the apparatus; and
wherein the device comprises at least one vacuum orifice extending from the tip through the base of the device.

Assignees

• Sandvik Intellectual Property

Inventors

• Secondi Jacques Joseph Philippe
• Dijon Pierre-Luc Paul Andre

Classifications

• B26D1/405

  for thin material, e.g. for sheets, strips or the like · CPC title

• B26F1/384

  using rotating drums · CPC title

• B26D7/14 Primary

  by tensioning the work · CPC title

• B26D1/12 Primary

  having a cutting member moving about an axis (B26D1/547 takes precedence; cup or like cutting members B26D1/44) · CPC title

• B26D1/40

  and coacting with a rotary member · CPC title