Back to results
US 3,937,623 AGranted
Method of making glass tubes
OwnerVasily Porfirovich Kononko, Konstantin Timofeevich Bondarev +6inventors
InventorsVasily Porfirovich Kononko, Konstantin Timofeevich Bondarev, Alexandr Alexandrovich Krivokon, Nikolai Nikiforovich Kovshar, Ljudmila Mikhailovna Ivanova, Elena Gavrilovna Frolova, Nikolai Antonovich Shestak, Nikolai Leontievich Shevchenko
Life of this patent
Estimating the term…
Abstract
A method of making glass tubes in which forced cooling of the tube is effected from the inside thereof in an annealing section of a tube fabricating plant.
Claims6
A method of making a glass tube comprising the following steps:
- the upright drawing of a melt from the free surface of the melt;
- supplying air to the inside of the tube being made;
- imparting geometric form to said tube under the effect of said air which is heated in a forming section;
- effecting a continuous vertical transfer of the tube being formed;
- annealing the tube being formed by causing a movement of cooling fluid in an annealing section spaced above the forming section for effecting concurrent cooling of said tube from the inside in the annealing section and subsequent cooling of the tube to an ambient temperature in the course of continuous vertical movement of the said tube.
2 more elements
Dependencies are inferred from the claim text.