US 9,004,913 B2Granted

Gas burner

AssigneeTetral Laval Holdings & Finance S.A.

InventorsGil Rochat, Pierre Fayet, Thomas Richter, Bernhard Zobel

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Abstract

A gas burner, which is particularly suitable for flame treatment of substrates having large surfaces, e.g. for coating such surfaces in a combustion chemical vapor deposition (CCVD) process, includes a burner body with a gas supply connection and a nozzle plate, wherein the burner body and the nozzle plate constitute together a gas plenum and the nozzle plate constitutes a perforated wall section of the plenum. The nozzle plate includes a large number of nozzles extending from a plenum side to a flame side of the nozzle plate and it is made of a plurality of sheets which are arranged in a stack and extend substantially perpendicular or substantially parallel to the nozzle extension. The sheets include through openings, wherein the through openings of all sheets are at least partly aligned with each other, or they have a comb-like form.

Claims14

Dependent claims

A gas burner for establishing an array of flames for a flame treatment of a substrate surface, the gas burner comprising:

a burner body with a gas supply connection;
and
a nozzle plate;
wherein the burner body and the nozzle plate together constitute a gas plenum,
wherein the nozzle plate constitutes a perforated wall section of the gas plenum and comprises a plurality of nozzles extending through the nozzle plate from a plenum side to a flame side of the nozzle plate,
wherein the nozzle plate is an element which is formed independently from the burner body and comprises a plurality of sheets made of sheet metal comprising determinate through openings,
wherein said plurality of sheets are arranged in a stack and are fixed to each other,
wherein all sheets comprise a plurality of the through openings, and in the stack the plurality of through openings of the sheets are aligned to each other to form together the nozzles,
wherein the plurality of sheets of the nozzle plate includes a plurality of first type sheets with a pattern of identical through openings that are aligned with respect to each other, one of the first type sheets defining the flame side of the nozzle plate,
wherein each sheet in the stack comprises a planar upper and lower side,
wherein the upper and lower sides of neighboring sheets in the stack lie surface upon surface against one another within the nozzle plate so that gas is directed to flow through the plurality of nozzles and not between the neighboring sheets in the stack,
wherein the first type sheet which defines the flame side of the nozzle plate is the furthermost sheet from the plenum side, and wherein the pattern of identical through openings in said first type sheet which defines the flame side of the nozzle plate define nozzle openings haying a diameter which is in a longest direction smaller than a length of the nozzles in a gas stream out direction, and
wherein each nozzle opening feeds one flame of an array of flames produced by the burner on the flame side of the nozzle plate, the array of flames thus being configured for treatment of the substrate surface.

10 more elements

A method for flame treatment comprising the steps of:

providing a substrate having a surface for receiving flame treatment;
providing a gas burner comprising
a burner body with a gas supply connection, and
a nozzle plate,
wherein the burner body and the nozzle plate together constitute a gas plenum,
wherein the nozzle plate constitutes a perforated wall section of the gas plenum and comprises a plurality of nozzles extending through the nozzle plate from a plenum side to a flame side of the nozzle plate,
wherein the nozzle plate is an element which is formed independently from the burner body and comprises a plurality of sheets made of sheet metal comprising determinate through openings,
wherein said plurality of sheets are arranged in a stack and are fixed to each other,
wherein all sheets comprise a plurality of the through openings, and in the stack the plurality of through openings of the sheets are aligned to each other to form together the nozzles,
wherein the plurality of sheets of the nozzle plate includes a plurality of first type sheets with a pattern of identical through openings that are aligned with respect to each other, one of the first type sheets defining the flame side of the nozzle plate,
wherein each sheet in the stack comprises a planar upper and lower side,
wherein the upper and lower sides of neighboring sheets in the stack lie surface upon surface against one another within the nozzle plate so that gas is directed to flow through the plurality of nozzles and not between the neighboring sheets in the stack,
wherein the first type sheet which defines the flame side of the nozzle plate is the furthermost sheet from the plenum side, and wherein the pattern of identical through openings in said first type sheet which defines the flame side of the nozzle plate define nozzle openings having a diameter which is in a longest direction smaller than a length of the nozzles in a gas stream out direction, and
wherein each nozzle opening feeds one flame of an array of flames produced by the burner on the flame side of the nozzle plate, the array of flames thus being configured for treatment of the substrate surface;
and
treating the substrate surface with the array of flames.

13 more elements

Dependencies are inferred from the claim text.

Facts

Application: 12/864,376Filed 20 Jan 2009
Priority: CH 114/0828 Jan 2008
Published: US 2011/0244411 A16 Oct 2011
Granted: 14 Apr 2015
Term ends: Not estimatedThe source records don’t support an estimate.

Classification6 codes

F23D 14/586
Of elongated shape, e.g. slits: formed by a set of sheets, strips, ribbons or the like
C23C 16/453
Characterised by the method of coating: passing the reaction gases through burners or torches, e.g. atmospheric pressure CVD
F23D 14/10
Induction type, e.g. Bunsen burner: with elongated tubular burner head
F23D 99/004
Burners specially adapted for specific applications: for use in particular heating operations

Family

US 2011/0244411 A1Pre-grant publication · published 6 Oct 2011
US 9,004,913 B2This patent

From the US filing history. Foreign family members aren’t listed.

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