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       CODE: 725.684-022 Buy the DOT:Download/CD-ROM
TITLE(s): TUBE ASSEMBLER, CATHODE RAY (electron. comp.)
Performs any combination of following tasks to assemble cathode-ray tubes used in television and
display equipment: Removes funnel from rack and places funnel onto conveyorized washing, rinsing,
and drying equipment. Positions funnel in rotatable holding chuck to secure funnel for painting.
Inserts brush into rotating funnel and paints dag (conductive graphite) coating as indicated by
chuck guide to provide electric conductivity. Verifies that aperture mask and display screen fit
together according to corresponding numbers. Examines aperture mask and screen in light box to
detect misaligned color dots, using microscope. Positions funnel in rotatable chuck equipped with
automatic frit dispenser. Moves controls that index frit dispenser around edge of funnel mouth to
dispense sealant. Removes frit-coated funnel from chuck and secures funnel in jig for joining
display screen assembly onto funnel. Positions display screen assembly on funnel edge and aligns
screen with reference points on funnel. Pushes jig onto conveyor leading into oven to fuse funnel
and display screen assembly into bulb. Places bulb on holding fixture of sprayer to coat interior
surface of bulb with protective layer of lacquer. Places bulb onto holding fixture of evaporation
equipment to apply aluminized coating to interior surface of bulb. Places bulb onto conveyor that
carries bulb through processing stations to preheat bulb, insert and fuse gun to neck of bulb to
form tube, and anneals and cools tube assembly. Places tube onto cart or conveyor for further
processing. Inspects tube for imperfections, such as blemishes, coating defects, scratches, bubbles,
or stains, using magnifier, ultraviolet light, inspection booth, or unaided vision. May be
designated according to duties performed as Aluminizer (electron. comp.); Bulb Assembler (electron.
comp.); Dag Coater (electron. comp.); Frit Coater (electron. comp.); Funnel Coater (electron comp.);
Gun-Sealing-Machine Operator (electron. comp.); Lacquer Sprayer (electron. comp.).
GOE: 06.02.23 STRENGTH: M GED: R2 M1 L1 SVP: 3 DLU: 89
ONET CROSSWALK: 93905B Electronic Components Assemblers
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