Method for producing a paper machine clothing

Patent metadata

Field	Value
Publication number	US-11795618-B2
Application number	US-202017422221-A
Country	US
Kind code	B2
Filing date	Jan 13, 2020
Priority date	Feb 8, 2019
Publication date	Oct 24, 2023
Grant date	Oct 24, 2023

Abstract

A method for producing a paper machine clothing includes the following steps: a) providing a film-like substrate having an upper face and a lower face opposite the upper face; b) forming a pattern of holes in the substrate by boring a multiplicity of holes, which connect the upper face to the lower face, into the substrate by way of at least one laser light source. A bore hole strategy is applied which ensures that, in temporal sequence between the forming of a first hole and an immediately adjacent second hole in the pattern of holes, at least one further hole of the pattern of holes is formed in the substrate which is not immediately adjacent either the first hole or the second hole in the pattern of holes.

First claim

The invention claimed is:

1. A method of producing a paper machine clothing, comprising the following steps:
providing a film-like substrate having an upper side and a lower side opposite the upper side;
forming a pattern of holes in the substrate by boring a multiplicity of holes connecting the upper side with the lower side into the substrate with at least one laser light source;
in the forming step, applying a bore hole strategy which ensures that, chronologically between an introduction of a first hole and a second hole that is immediately adjacent the first hole in the pattern of holes, at least one further hole of the pattern of holes is introduced into the substrate which is not immediately adjacent the first hole or the second hole in the pattern of holes; and
wherein a spacing distance between two holes that are introduced chronologically in direct succession into the substrate is at least two times as great as a smallest spacing distance between two immediately adjacent holes in the pattern of holes.

2. The method according to claim 1 , which comprises applying the bore hole strategy to a majority of the holes of the pattern of holes.

3. The method according to claim 2 , which comprises applying the bore hole strategy to all the holes of the pattern of holes.

4. The method according to claim 1 , wherein the at least one further hole is one of at least two further holes and the bore hole strategy provides, chronologically between the introduction of the first hole and the second hole immediately adjacent the first hole, for introducing the at least two further holes into the substrate, with none of the at least two further holes being immediately adjacent the first hole or the second hole.

5. The method according to claim 1 , wherein the at least one further hole is one of at least three further holes and the bore hole strategy provides, chronologically between the introduction of the first hole and the second hole immediately adjacent the first hole, for introducing the at least three further holes into the substrate, with none of the at least three further holes being immediately adjacent the first hole or the second hole.

6. The method according to claim 1 , wherein the at least one further hole is one of at least four further holes and the bore hole strategy provides, chronologically between the introduction of the first hole and the second hole immediately adjacent the first hole, for introducing the at least four further holes into the substrate, with none of the at least four further holes being immediately adjacent the first hole or the second hole.

7. The method according to claim 1 , wherein the spacing distance between the two holes that are introduced chronologically in direct succession into the substrate is at least three times or at least four times as great as the smallest spacing distance between the two immediately adjacent holes in the pattern of holes.

8. The method according to claim 1 , which comprises moving the laser light source relative to the substrate during the forming step.

9. The method according to claim 8 , which comprises carrying out a movement of the laser light source relative to the substrate substantially discontinuously.

10. The method according to claim 8 , which comprises carrying out a movement of the laser light source relative to the substrate substantially continuously.

11. The method according to claim 8 , which comprises tensioning the substrate during the forming step by way of at least two rotatable rollers having mutually parallel roller axes.

12. The method according to claim 11 , which comprises arranging the laser light source over the substrate and moving the laser light source relative to the substrate parallel to the roller axes.

13. The method according to claim 1 , wherein the at least one laser light source is one of a plurality of laser light sources and the forming step comprises simultaneously using the plurality of laser light sources in order to introduce holes into the substrate.

14. A method of producing a paper machine clothing, comprising the following steps:
providing a film-like substrate having an upper side and a lower side opposite the upper side;
forming a pattern of holes in the substrate by boring a multiplicity of holes connecting the upper side with the lower side into the substrate with at least one laser light source;
in the forming step, applying a bore hole strategy which ensures that, chronologically between an introduction of a first hole and a second hole that is immediately adjacent the first hole in the pattern of holes, at least one further hole of the pattern of holes is introduced into the substrate which is not immediately adjacent the first hole or the second hole in the pattern of holes; and
using scanner optics for displacing a laser beam from the laser light source in jumps on the substrate, for carrying out the bore hole strategy.

15. The method according to claim 14 , wherein the scanner optics comprises at least one movable mirror.

Assignees

• Voith Patent Gmbh

Inventors

• Straub Michael

Classifications

• D21F7/08 Primary

  Felts · CPC title

• D06M10/005

  Laser beam treatment · CPC title

• D21F1/0063 Primary

  Perforated sheets · CPC title