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Priority to NL7201672ApriorityCriticalpatent/NL7201672A/xx
Publication of NL7201672ApublicationCriticalpatent/NL7201672A/xx
H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
H01J9/20—Manufacture of screens on or from which an image or pattern is formed, picked up, converted or stored; Applying coatings to the vessel
H01J9/22—Applying luminescent coatings
H01J9/227—Applying luminescent coatings with luminescent material discontinuously arranged, e.g. in dots or lines
H01J9/2271—Applying luminescent coatings with luminescent material discontinuously arranged, e.g. in dots or lines by photographic processes
H01J9/2272—Devices for carrying out the processes, e.g. light houses