tubulator

plural tubulators

1. datedAn exhaust tube or tubulation.

   2 more examples

   It was soon found advantageous to divide the operations of tubulating the bulb and sealing the stem into the bulb among two operators, one of w^hom did the tubulating, and the other the sealing-in. It w^as further found advisable to punch the little tip in the top of the bulb before sending it to the tubulator.

   1905, Franklin Institute, Philadelphia, Journal - Franklin Institute of the State of Pennsylvania, page 33

   Method and apparatus for manufacturing incandescent-lamp bulbs. A tubulator through which an incandescent-lamp bulb may be exhausted is formed in the wall of the stem or flare and not in the bulb itself by locally heating the desired spot on the stem and inserting a mandrel in the thus softened glass.

   1918, American Ceramic Society, “Ceramic Patents”, in Journal of the American Ceramic Society, page 932