Multi-tube burner and glass preform manufacturing method...

Details Multi-tube burner and glass preform manufacturing method... Multi-tube burner and glass preform manufacturing method...

2007-01-23

2007-01-23

Halpern, Mark (Department: 1731)

Glass manufacturing

Fiber making apparatus

Having coating or treating means

C065S414000, C065S413000, C065S017400, C065S355000, C431S127000, C431S129000, C431S153000, C431S177000

Reexamination Certificate

active

10610922

ABSTRACT:
A multi-tube burner is provided which includes a cylindrical outermost nozzle and at least one cylindrical inner nozzle provided coaxially with the outermost nozzle to form annular jet openings for gases used to manufacture a glass preform. The angle between a center axis of an outer circumference of the outermost nozzle and a distal end portion of each of the inner nozzles is 90°± not more than 3°. Furthermore, the distance between the center axis of the outer circumference of the outermost nozzle and each of center axes of inner circumferences and outer circumferences of the inner nozzles is not more than 0.20 mm.

REFERENCES:
patent: 4618354 (1986-10-01), Suda et al.
patent: 6332340 (2001-12-01), Bodelin et al.
patent: 6725690 (2004-04-01), Enomoto et al.
patent: 11-199264 (1999-07-01), None
patent: 2000-327341 (2000-11-01), None

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