Counter-pressure roller, an arrangement and a method thereof

Patent metadata

Field	Value
Publication number	US-12539677-B2
Application number	US-202118251924-A
Country	US
Kind code	B2
Filing date	Nov 25, 2021
Priority date	Dec 1, 2020
Publication date	Feb 3, 2026
Grant date	Feb 3, 2026

Abstract

A counter-pressure roller for applying pressure on a longitudinal sealing of a packaging material web comprises, a first back-panel support section having a first radius and a second back-panel support section having a second radius, for supporting first and second back-panels of the web, respectively. The first radius is greater than the second radius, and a groove is between the first and second back-panel support sections, for holding a longitudinal overlap section formed by first and second edge sections of the first and second back-panels, respectively. The first edge section is positionable outside the second edge section, with the first edge section facing a bottom of the groove. The bottom has a third radius less than or equal to the second radius. The groove has a first groove edge section having a first inclination, and a second groove edge section having a second inclination.

First claim

The invention claimed is:

1 . A counter-pressure roller for applying pressure on a longitudinal sealing of a web of packaging material, wherein the counter-pressure roller comprises,
a first back-panel support section having a first radius and a second back-panel support section having a second radius, for supporting a first and a second back-panel of the web, respectively, wherein the first radius is greater than the second radius, a groove between the first and second back-panel support sections, for holding a longitudinal overlap section formed by a first and second edge section of the first and second back-panels, respectively, wherein the first edge section is arranged to be placed outside the second edge section such that the first edge section is facing a bottom of the groove, wherein the bottom of the groove has a third radius that is less than the second radius, wherein the groove has a first groove edge section, between the first back-panel support section and the bottom of the groove, having a first inclination, and a second groove edge section, between the second back-panel support section and the bottom of the groove, having a second inclination, the first inclination being less than the second inclination.

2 . The counter-pressure roller according claim 1 , wherein the first inclination is 10-30 degrees from a central axis of the counter-pressure roller.

3 . The counter-pressure roller according to claim 1 , wherein a nip edge is formed between the first back-panel support section and the groove such that the nip edge is facing a longitudinal sealing strip section when the longitudinal overlap section is facing the bottom of the groove.

4 . The counter-pressure roller according to claim 1 , wherein a depth of the groove, from the second back-panel support section to the bottom of the groove, is less than or equal to 1.5 times a thickness of the web of packaging material.

5 . The counter-pressure roller according to claim 1 , wherein the bottom of the groove is placed closer to the second than to the first back-panel support section.

6 . The counter-pressure roller according to claim 1 , wherein the second inclination is 80-90 degrees from a central axis of the counter-pressure roller, such that the second groove edge section is arranged for facing an end of the first edge section of the web of packaging material.

7 . The counter-pressure roller according to claim 1 , wherein the counter-pressure roller is made of a rigid material.

8 . A counter-pressure roller for applying pressure on a longitudinal sealing of a web of packaging material, wherein the counter-pressure roller comprises,
a first back-panel support section having a first radius and a second back-panel support section having a second radius, for supporting a first and a second back-panel of the web, respectively, wherein the first radius is greater than the second radius, a groove between the first and second back-panel support sections, for holding a longitudinal overlap section formed by a first and second edge section of the first and second back-panels, respectively, wherein the first edge section is arranged to be placed outside the second edge section such that the first edge section is facing a bottom of the groove, wherein the bottom of the groove has a third radius that is less than the second radius, wherein the groove has a first groove edge section, between the first back-panel support section and the bottom of the groove, having a first inclination and a flat shape in a longitudinal cross-section, and a second groove edge section, between the second back-panel support section and the bottom of the groove, having a second inclination, the first inclination being less than 90 degrees from a central axis of the counter-pressure roller.

9 . The counter-pressure roller according claim 8 , wherein the first inclination is 10-30 degrees from the central axis of the counter-pressure roller.

10 . The counter-pressure roller according to claim 8 , wherein the bottom of the groove is closer to the second back-panel support section than to the first back-panel support section.

11 . The counter-pressure roller according to claim 10 , wherein the first inclination is less than the second inclination.

12 . The counter-pressure roller according to claim 8 , wherein the counter-pressure roller is made of a rigid material.

13 . The counter-pressure roller according to claim 8 , wherein the first inclination is less than the second inclination.

14 . A counter-pressure roller for applying pressure on a longitudinal sealing of a web of packaging material, wherein the counter-pressure roller comprises,
a first back-panel support section having a first radius and a second back-panel support section having a second radius, for supporting a first and a second back-panel of the web, respectively, wherein the first radius is greater than the second radius, a groove between the first and second back-panel support sections, for holding a longitudinal overlap section formed by a first and second edge section of the first and second back-panels, respectively, wherein the first edge section is arranged to be placed outside the second edge section such that the first edge section is facing a bottom of the groove, wherein the bottom of the groove has a third radius that is less than the second radius, wherein the groove has a first groove edge section, between the first back-panel support section and the bottom of the groove, having a first inclination, and a second groove edge section, between the second back-panel support section and the bottom of the groove, having a second inclination, the first inclination being 10-30 degrees from a central axis of the counter-pressure roller.

15 . A counter-pressure roller for applying pressure on a longitudinal sealing of a web of packaging material, wherein the counter-pressure roller comprises,
a first back-panel support section having a first radius and a second back-panel support section having a second radius, for supporting a first and a second back-panel of the web, respectively, wherein the first radius is greater than the second radius, a groove between the first and second back-panel support sections, for holding a longitudinal overlap section formed by a first and second edge section of the first and second back-panels, respectively, wherein the first edge section is arranged to be placed outside the second edge section such that the first edge section is facing a bottom of the groove, wherein the bottom of the groove has a third radius that is less than the second radius, wherein the groove has a first groove edge section, between the first back-panel support section and the bottom of the groove, having a first inclination, and a second groove edge section, between the second back-panel support section and the bottom of the groove, having a second inclination, a depth of the groove, from the second back-panel support section to the bottom of the groove, being less than or equal to 1.5 times a thickness of the packaging material.

16 . A counter-pressure roller for applying pressure on a longitudinal sealing of a web of packaging material, wherein the counter-pressure roller comprises,
a first back-panel support section having a first radius and a second back-panel support section having a second radius, for supporting a first and a second back-panel of the web, respectively, wherein the first radius is greater than the second radius, a groove between the first and second back-panel support sections, for holding a longitudinal overla

Assignees

• Tetra Laval Holdings & Finance

Inventors

• Macini Nicola
• Colliva Nicola
• Costa Stefano
• La Notte Mario
• Cremonese Andrea

Classifications

• B65B51/26

  Devices specially adapted for producing transverse or longitudinal seams in webs or tubes · CPC title

• B65B51/16

  by rotary members · CPC title

• B31B70/8123

  Applying strips · CPC title

• B31B70/644

  Making seals parallel to the direction of movement, i.e. longitudinal sealing · CPC title

• B29C66/849

  Packaging machines · CPC title