# US 2013/0280412 A1 · Flame treatment of a substrate

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 2013/0280412 A1
- Document ID: US20130280412A1
- Status: Published application
- Kind: A1
- Application number: 13/977,449
- Filed: 2011-12-22
- Published: 2013-10-24
- Earliest claimed: 2010-12-29
- Assignees: Tetra Laval Holdings & Finance S.A.
- Inventors: Anders Sandstrom
- Web page: https://patentgrep.com/patent/US20130280412A1

## CPC

- F23N 5/003: {using detectors sensitive to combustion gas properties (F23N5/02, F23N5/18 - F23N5/26 take precedence)}
- B29C 59/08: by flame treatment {; using hot gases}
- D21H 25/04: Physical treatment, e.g. heating, irradiating (D21H25/18 takes precedence; dryer section of machines for making continuous webs of paper D21F5/00)
- F23N 5/082: {using electronic means}
- F23N 2229/20: Camera viewing
- F23N: REGULATING OR CONTROLLING COMBUSTION (control devices specially adapted for combustion apparatus in which combustion takes place in a fluidised bed of fuel or other particles F23C10/28; condition responsive controls for regulating combustion in domestic stoves with open fires for solid fuel F24B1/187)
- B29C: SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING (making preforms B29B11/00; making laminated products by combining previously unconnected layers which become one product whose layers will remain together B32B37/00 - B32B41/00)
- D21H: PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR

## Abstract

The present invention relates to a method and system for controlling flame treatment of a substrate.

## Claims

### Claim 1

A method for optimizing adhesion by controlling flame treatment of a substrate, said method comprising:
controlling the mass flow of fuel and air fed to a burner;
acquiring radical emission data by monitoring radical emission emanating from a flame produced from the burner, using a flame analyzer;
processing the radical emission data;
comparing the acquired radical emission data with radical emission data from a database; and
outputting the result of the comparison.

### Claim 2 (depends on 1)

The method according to claim 1, wherein the flame analyzer utilizes a non-invasive monitoring technique.

### Claim 3 (depends on 1)

The method of claim 1, wherein outputting the result generates an error signal when the acquired radical emission data deviate from the radical emission data in the database.

### Claim 4 (depends on 1)

The method of claim 1, further comprising adjusting at least one of:
the mass flow of fuel and/or air fed to the burner,
a relative angle between the burner and the substrate, and
the distance between the burner and the substrate.
when the acquired radical emission data deviate from the radical emission data in the database.

### Claim 5 (depends on 1)

The method according to claim 1, wherein the substrate is paper, paperboard, carton or plastic film.

### Claim 6 (depends on 1)

The method according to claim 1, wherein the radical emission is hydroxyl radical emission, NH radical emission, CN radical emission, CH radical emission and/or C2 radical emission.

### Claim 7 (depends on 6)

The method according to claim 6, wherein the radical emission is hydroxyl radical emission.

### Claim 8 (depends on 1)

The method according to claim 1, wherein the flame analyzer comprises a camera and a filter.

### Claim 9 (depends on 8)

The method according to claim 8, wherein the camera is a camera having at least one image sensor that detects light in the ultraviolet (UV) range.

### Claim 10 (depends on 8)

The method according to claim 8, wherein the camera is a charge coupled device (CCD) camera.

### Claim 11 (depends on 8)

The method according to claim 8, wherein a filter having a λmax at 310±5 nm, 340±5 nm, 390±5 nm, 430±5 nm, or 520±5 nm is used.

### Claim 12

A system for controlling flame treatment of a substrate, said system comprising:
a burner, and
a flame analyzer comprising a camera and a filter,
wherein the flame analyzer is arranged to acquire radical emission data from a flame.

### Claim 13 (depends on 12)

The system according to claim 12, wherein the system further comprises a processing unit to which radical emission data acquired by the flame analyzer is transferred and compared with radical emission data from a database.

### Claim 14 (depends on 12)

The system according to claim 12, wherein the processing unit that receives the data acquired by the flame analyzer is a unit integrated in the flame analyzer.

### Claim 15 (depends on 12)

The system according to claim 12, wherein the system further comprises an output device.

### Claim 16 (depends on 12)

The system according to claim 12, wherein the camera is a camera having at least one image sensor that detects light in the ultraviolet (UV) range.

### Claim 17 (depends on 12)

The system according to claim 12, wherein the camera is a charge coupled device (CCD) camera.

### Claim 18 (depends on 12)

The system according to claim 12, comprising a filter having a λmax at 310±5 nm, 340±5 nm, 390±5 nm, 430±5 nm, or 520±5 nm.

### Claim 19 (depends on 18)

The system according to claim 18, wherein the filter has a λmax at 310±5 nm.