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US 4,612,027 AGranted
Method and apparatus for forming glass fibers
AssigneeOwens-Corning Fiberglas Corporation
InventorJerome F. Marra
Life of this patent
Estimating the term…
Abstract
A feeder for the production of glass filaments is provided with dripless and non-dripless fields of stream defining orifices to, in part, have the advantages of dripless as well as non-dripless type feeders.
Claims24
A method of forming glass filaments from a feeder comprising:
- supplying streams of molten glass to be attenuated into filaments from a first field of orifices in said feeder;
- supplying streams of molten glass to be attenuated into filaments from a second field of orifices in said feeder;
- attenuating the streams of glass into filaments;
- and
- reducing the pressure of the molten glass at the first field of orifices to a pressure less than the internal pressure of a bead formed at an orifice upon the cessation of filament attenuation at that orifice, but greater than the internal pressure of a forming cone of glass established during attenuation at one of said orifices of said first field without so reducing the pressure of the molten glass at the second field of orifices.
2 more elements
A method of forming glass filaments from a feeder comprising:
- (a) supplying streams of molten glass to be attenuated into filaments from a plurality of orifices, said orifices being arranged as a plurality of fields in a discharge wall;
- (b) attenuating the streams of glass into filaments;
- and
- (c) reducing the pressure of the molten glass in at least one of said fields during said attenuation to such an extent that upon a filament break at one of said orifices of such field, the flow of molten glass from that orifice stops, yet the pressure is sufficient for filament formation at the other orifices of that field;
- while
- (d) maintaining the pressure of the molten glass in at least one of said other fields such that molten glass continues to flow from an orifice in such field when a filament break occurs at such orifice.
3 more elements
A feeder for supplying molten streams of glass to be attenuated into filaments comprising:
- a discharge wall having a plurality of stream defining orifices therein, said orifices being arranged as a plurality of fields;
- regulator means for (1) reducing the pressure of the molten glass in at least one of said fields during said attenuation to such an extent that upon a filament break at one of said orifices of such field, the flow of molten glass from that orifice stops, yet the pressure is sufficient for filament formation at the other orifices of that field;
- while (2) maintaining the pressure of the molten glass in at least one of said other fields such that molten glass continues to flow from an orifice in such field when a filament break occurs at such orifice.
Apparatus for the production of continuous glass filaments comprising:
- feeder means comprised of a feeder for supplying molten streams of glass to be attenuated into filaments comprising:
- a discharge wall having a plurality of stream defining orifices therein, said orifices being arranged as a plurality of fields;
- regulator means for effecting dripless operation in at least one of said fields and non-dripless operation in at least one of said other fields;
- cooling means for removing heat from the filament forming region;
- and
- means for attenuating said molten streams into continuous filaments.
3 more elements
Dependencies are inferred from the claim text.