Glaverbel

Secondo Franceschi

Robert Terneu

A device for the formation, by pyrolysis, of a coating composed of metal or a metal compound on a face of a hot glass substrate which is in motion by bringing the face into contact with a gaseous reagent, includes a vault; support device for conveying the hot glass substrate along a path through a coating chamber defined between the vault and the face; device for supplying and distributing gaseous reagent to the coating chamber as a flow; and device for discharging exhaust gas from the coating chamber. The device for supplying and distributing gaseous reagent includes an ejection nozzle having defined therein a slot which opens directly into the coating chamber and has longitudinal internal walls which are substantially parallel to each other. The ejection nozzle has longitudinal internal walls which define a continuous convergent path which terminates at and communicates with the slot and which has an angle of convergence (.alpha.), thereby causing the flow of gaseous reagent to conform to the slot. The angle of convergence (.alpha.) of the convergent path ranges from 4.degree. to 14.degree. at any point.

Device for forming a pyrolytic coating

A device for the formation, by pyrolysis, of a coating on a face of a hot glass substrate includes a vault; support elements for conveying the substrate along a path through a coating chamber defined between the main vault and the substrate; elements for supplying and distributing gaseous reagent to the coating chamber; elements for discharging exhaust gas from the coating chamber; and a plurality of struts. The elements for supplying and distributing gaseous reagent to the coating chamber include an ejection nozzle having defined therein a slot which opens directly into the coating chamber, has opposing longitudinal internal walls, extends transverse to the path of the substrate, and has a length which is substantially equal to the coating width of the coating formed. The plurality of struts are positioned at spaced intervals and connect the opposing walls of the slot together to thereby maintain the walls of the slot in substantially parallel disposition. The ejection nozzle has longitudinal internal walls which define a continuous convergent path which terminates at and communicates with the slot and has an angle of convergence (.alpha.), thereby causing the flow of gaseous reagent to conform to the slot, the angle of convergence (.alpha.) of the convergent path being up to but not greater than 14.degree. at any point. Alternatively, instead of a plurality of struts, the device may include elements for trapping stray deposits including at least one metal bar disposed below the vault of the coating chamber.

Device for forming a pyrolytic coating on a hot glass substrate

A device for the formation, by pyrolysis, of a coating of metal or a metal compound on one face of a hot glass substrate which is in motion by bringing the face into contact with a gaseous reagent includes a roof; support device for conveying the hot glass substrate along a path through a coating chamber defined between the roof and the face of the hot glass substrate; at least one reagent gas inlet in the form of a slot opening directly into the coating chamber and extending transverse to the path of the hot glass substrate for supplying and distributing gaseous reagent to the coating chamber; and at least one exhaust gas outlet for discharging exhaust gas from the coating chamber. At least during operation of the device a movable shield device is positioned in the coating chamber adjacent the roof thereof, and, prior to operation of the device, the device includes a device for positioning a movable shield device in the coating chamber adjacent the roof thereof, to reduce the formation of deposits on the roof of the coating chamber.

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Gosselies, Belgium

Secondo Franceschi