B - Operations – Transporting – 05 – D
Patent
B - Operations, Transporting
05
D
32/23, 117/57, 1
B05D 1/02 (2006.01) C03C 17/00 (2006.01) C03C 17/23 (2006.01) C03C 17/245 (2006.01) C23C 16/40 (2006.01) C23C 16/453 (2006.01)
Patent
CA 1300439
ABSTRACT (Figure 2) APPARATUS FOR AND PROCESS OF COATING GLASS Apparatus for pyrolytically forming a metal compound coating on an upper face of a hot glass substrate 1 in sheet or ribbon form comprises conveyor means 2 for conveying the substrate 1 in a downstream direction 3 along a path also indicated at 1. A coating station 4 comprises a roof structure 5 defining a coating chamber 6 opening downwardly onto the path 1 and means 7 for spraying coating precursor solution into the chamber downwardly towards the substrate. The spraying means 7 is located to spray the coating precursor solution into a spraying zone 9 of the coating chamber 6 from a height above the substrate path 1 of at least 75cm. Heating means (which may include radiant heaters and/or means such as 35 for supplying preheated gas) is provided for supplying heat to the spraying zone 9. The roof structure 5 defines a passageway portion 13 of the coating chamber leading downstream from the spraying zone 9 and imparting to the coating chamber 6 a total length of at least 2 metres. Means such as aspirator boxes 39 is provided for generating aspirating forces on atmospheric material within the passageway 13 to encourage such material to flow along the substrate path to the downstream end (27) of the passageway and to enter exhaust ducting (leading from aspirator boxes 39) for leading such material away from the substrate path. In operation. the spraying zone 9 of the coating chamber 6 is heated to cause evaporation of part of the coating precursor material before it reaches the substrate 1 to charge the atmosphere in that zone with vaporised coating precursor material. The solution is sprayed with sufficient energy to ensure positive impact of residual sprayed coating precursor material against the substrate to initiate coating of the substrate face. and atmosphere laden with coating precursor material in the vapour phase is caused to flow in the downstream direction from the spraying zone 9 along and in contact with the coated substrate face for a contact time of at least 10 seconds. whereafter residual material of the precursor laden current is directed away from the substrate.
522607
Laethem Robert Van
Terneu Robert
Thomas Jean-Francois
Van Cauter Albert
Glaverbel
Ogilvy Renault Llp/s.e.n.c.r.l.,s.r.l.
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