Saint-Gobain Vitrage

Saint-Gobain Vitrage International

Michel Valere

Jean Fosset

Daniel Defort

Vincent Sauvinet

Maurice Boutrouille

The invention relates to a device for the distribution of pulverulent product on a substrate. The device has two walls delimiting a blade-shaped cavity converging toward substrate, a gas injection chamber closed by a plate, pierced with a multiplicity of jets 12 for injecting a gas under pressure inducing ambient air into the cavity substantially parallel to the wall of the cavity which is adjacent thereto which homogenizes the pulverulent gas product mixture and accelerates it in the direction of the substrate, thus forming a uniform thin layer on a substrate.

Distribution of a pulverulent solid

The invention relates to coating a heated substrate, particularly glass, by a process according to which a distribution nozzle ending in a slot, sprays a gas stream mixed with a pulverulent or powder product, which decomposes in heat, onto a heated substrate for contact therewith to form a thin coating layer thereupon. The coating zone in the vicinity of the main stream of gas-entrained powder coming from the nozzle is cooled to prevent premature decomposition and to directly remove pulverulent products not immediately deposited upon the substrate. Also, a device for carrying out the novel process is disclosed herein. The invention makes it possible to produce a coated glass substrate which is essentially free of the problem of coating fogging.

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La Croix Saint-Ouen, France

Daniel Defort