Patent ID: 6192713
Filing Date: 2001-02-27
Classification: C03B,C03C

Abstract:
Apparatus for the delivery of constituents in the manufacture of a glass fiber preform comprising:a main glass tube;a plurality, of smaller tubes comprising at least two tubes for insertion into one end of said main glass tube, each of said tubes having an input end and an output end, the output ends being the most interior end within the main glass tube;the inner most of said tubes having a first tube interface at its output that permits forward regulated flow into a second of said tubes but prevents backward flow through the first tube interface;said inner most tube having a first chamber containing a solid state form of a first glass constituent;the second of said tubes having a second chamber for mixing a second glass constituent with a vapor form of said first glass constituent after passage of the latter through said first tube interface to form a mixture of constituents, the second tube having a second tube interface at its output that permits forward regulated flow into a further tube of said plurality of smaller tubes or into said main glass tube but prevents backward flow through the second tube interface;the mixture of said constituents mixing with other glass forming constituents within said main glass tube after passage through said tubes interfaces so that said other glass forming constituents are impeded from entering said first and second chambers via said first and second tube interfaces.