Abstract: Apparatus, systems and methods for making a fibrous products form molten material into fibers. The fibers are sprayed with a coolant liquid to cool the fibers. A flow rate of the sprayed coolant liquid is controllable. The fibers are also sprayed with a binder dispersion. The fibers are directed toward a conveyor to form an uncured fibrous pack. A thickness of the uncured pack is measured and the flow rate of the sprayed coolant liquid is controlled based on the measured thickness of the uncured pack.

Abstract: It is an object of the present invention to uniformly disperse fibrous material such as short glass fibers so as to be distributed on a collection conveyor, without using compressed air for dispersion of the fibrous material. The present invention provides a method for collecting fibrous material, wherein the fibrous material fiberized by a spinner of a fiberizing unit is dispersed by a hollow bucket disposed just under the spinner, so as to be collected on a collection conveyor disposed below the hollow bucket, comprising: forming said hollow bucket by connecting a blasting section having an oval opening at its lower end, with a waistline section as a lower end of a hopper section having a circular shape in cross section, and deforming the inner surface of the blasting section toward said oval opening, thereby dispersing the fibrous material dropped in the hollow bucket in a width direction of the collection conveyor from the blasting section, so as to be collected on the collection conveyor.

Abstract: In a glass fiber forming station, bushing air is delivered to the veil from grills that encroach near the front and rear sides of the veil. Sealing material may at least partially seal the space around the bushing. The system may reduce the requirement for conditioned air, and may reduce the likelihood of dust entrainment in the veil. Pot sprays may be provided for additional cooling of the veil. In a method of retrofitting a glass fiber forming station, a station duct is attached to a main duct, and carries air from the main duct to a grill that extends near the veil, for example within 12 inches of the veil.

Abstract: Device intended for an installation for forming fibrous felts, the fibers being formed from a material that can be attenuated by internal centrifugation and by attenuation by means of a gas stream, the flow of fibers being in the form of a tubular veil, the device including air blowing means that expel air tangentially to the tubular veil so as to impress a rotational movement on the veil, wherein the blowing means deliver air in a direction perpendicular to the main direction of the flow of the tubular veil.

Abstract: In furnaces for producing high purity fused silica glass boules, glass particles have a tendency to build-up adjacent the burner hole rim. It was discovered that unburned furnace gases containing silica particles where re-circulated in the furnace close to the burner hole rim and reacted with the oxygen of infiltrated air adjacent the burner hole, and thus deposited such particles in the form of a glassy build-up about the rim of the burner hole. In order to eliminate the source of oxygen adjacent the burner hole rim, a curtain of an inert gas is caused to flow through the burner hole between the sidewalls of the burner hole and the flame of the burner. Accordingly, the curtain of inert gas inhibits the combustion of the unburned hydrogen and carbon monoxide furnace gases adjacent the exit rim of the burner hole and thereby minimizes glass build-up about the burner hole rim.

Abstract: In a process of making gas laid products by entraining particles including fibers at least partially coated with a binder in a gaseous stream, passing the stream through a forming chamber and through a permeable collecting surface where the particles including fibers build up to form a product like fiber glass insulation, this invention prevents particles including fibers from contacting and building up on the walls of the forming chamber and causing wet spots in the finished product by maintaining a high velocity, high pressure layer of gas close to the exposed surface of the walls of the chamber and moving in the general direction of the gaseous stream. This is accomplished by apparatus including a plurality of plenum boxes forming the walls of the forming chamber with the surface exposed to the gaseous stream having gas directing openings therein.