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US 8,567,218 B2Granted
Burner for chemical vapour deposition of glass
AssigneePrysmian Cavi E Sistemi Energia S.R.L.
InventorsCarlo Cognolato, Francesco Mole′, Andrea Demergazzi, Franco Veronelli
Life of this patent
Estimating the term…
Abstract
A burner for a vapour deposition process has a central nozzle for ejecting a glass precursor material, at least a crown of nozzles surrounding said central nozzle for ejecting a flame reactant, and a circular nozzle between said central nozzle and said crown of nozzles for ejecting an innershield gas, wherein the central nozzle has a concave shape in a cross section in the axial plane and, preferably, a symmetry about an axial plane.
Claims19
A burner for a vapour deposition process, comprising:
- a front face;
- a precursor exit port defined in said front face for ejecting a glass precursor material, the precursor exit port having a center centrally-located on said front face, said precursor exit port having a concave shape at said front face comprising a circular central region and a plurality of radial regions extending from the central region and each radial region is defined by a pair of walls converging toward the axis and an end wall, respectively;
- and
- an annular orifice defined in said front face for ejecting a gas, said annular orifice surrounding said central orifice.
1 more element
A burner for a vapour deposition process, comprising:
- a face block having a front face;
- a central duct for the passage of a glass precursor material, the central duct exiting in a precursor exit port on said front surface;
- a circular duct for the passage of a gas reactant, said circular duct extends around said central duct and terminates in a circular reactant exit port on said front surface;
- wherein said precursor exit port has a concave shape at said front face increasing contact surface between the precursor and the reactant, said concave shape comprising a circular central region and a plurality of radial regions extending from the central region and each radial region is defined by a pair of walls converging toward the axis and an end wall, respectively.
1 more element
Dependencies are inferred from the claim text.