Apparatus for heat treatment of fibrous mats
AssigneeSaint-Gobain Industries
InventorsJean A. Battigelli, Francois Bouquet
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Abstract
A technique is disclosed for heat treatment of fibrous mats, especially mats formed of mineral fibers such as glass and carrying a heat hardenable binder material, such as a thermosetting resin. The method and the equipment disclosed provide for continuous feed of the mat through a curing or treating oven having a plurality of heat treatment zones or areas. In one form of the method and equipment, the heat treatment in at least one zone is effected by circulation of a heated gas, such as air, through the mat in said zone, and the mat is also subjected to heat treatment in a localized area lying within said zone by passage of a second heated gas through the mat, the second heated gas having a pressure higher than that in the surrounding portions of said zone.
Claims9
Apparatus for heat treating a fibrous mat carrying a heat hardenable fiber binder comprising conveyor mechanism for advancing the fibrous mat through a feed and treatment path, a pair of gas circulation boxes arranged at opposite sides of the mat in said path and defining a treatment zone in which gas is passed through the fibrous mat between the circulation boxes, gas supply and exhaust ducts respectively connected with said circulation boxes and providing for passage of heated gas through the fibrous mat in said treatment zone, a pair of supply and exhaust gas circulation manifolds positioned within said circulation boxes and defining a localized treatment area within and smaller than said treatment zone, and heated gas circulating means associated with said manifolds and circulating heated gas through the fibrous mat at a pressure higher than that of the gas passed through the fibrous mat between said circulation boxes.
Dependencies are inferred from the claim text.