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A furnace, a continuous ribbon of glass moves along a conveyor belt.
Precisely aligned air nozzles blow the glass through holes in the
conveyor belt into molds, creating the casings. A ribbon machine moving
at top speed can produce more than 50,000 bulbs per hour. After the
casings are blown, they are cooled and then cut off of the ribbon
machine. Next, the inside of the bulb is coated with silica to remove
the glare caused by a glowing, uncovered filament. The company emblem
and bulb wattage are then stamped onto the outside top of each casing
Precisely aligned air nozzles blow the glass through holes in the
conveyor belt into molds, creating the casings. A ribbon machine moving
at top speed can produce more than 50,000 bulbs per hour. After the
casings are blown, they are cooled and then cut off of the ribbon
machine. Next, the inside of the bulb is coated with silica to remove
the glare caused by a glowing, uncovered filament. The company emblem
and bulb wattage are then stamped onto the outside top of each casing
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