Glass manufacturing – Processes – Forming product or preform from molten glass
Patent
1991-10-15
1992-09-08
Schor, Kenneth M.
Glass manufacturing
Processes
Forming product or preform from molten glass
65 182, 427 38, 427163, 427237, 427167, C03B 37018
Patent
active
051455099
ABSTRACT:
In the manufacture of optical fibers according to the PCVD method, a method is provided wherein the yield of the method (.eta.), in particular at increased deposition rates (m), is raised by reducing the geometrical taper, without forming optical tapers. This is obtained in that glass is deposited in layers on the inside of a glass tube and, simultaneously, on a glass rod having a circular cross-section, which rod is arranged inside the glass tube, such that its longitudinal axis coincides with that of the glass tube, the radius of the glass rod being adjusted to at most 0.67 times and at least 0.2 times the inner radius of the glass tube, and the glass rod being removed from the glass tube upon completion of the deposition process.
REFERENCES:
patent: 4263032 (1981-04-01), Sinclair
patent: 4417911 (1983-11-01), Cundy
patent: 4741747 (1988-05-01), Geittner
patent: 4871383 (1989-10-01), Bachmann
Bachmann Peter K.
Hagemann Hans-Jurgen E.
Warnier Jacques P. M.
Wilson Howard J. C.
Bartlett Ernestine C.
Schor Kenneth M.
U.S. Philips Corp.
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