Fire retardant delivery system

In combination with a batt making machine including a hopper containing organic cellulose material, means distributing said material into at least a pair of thin webs, means for advancing the webs in converging generally triangular paths and thereby combining said webs into a double thick web and conveyor means carrying said combined webs from said combining means to form batts;

• the improvement characterized by a system for applying liquid fire retardant material to said webs comprising air and liquid conduits positioned between said web as they converge, a plurality of spray nozzles distributed along said conduits, each of which is connected to both said air and liquid conduits, said nozzles being located within said combining means and directed toward said webs at the point in said triangular path where said webs converge;
• means connecting a source of fire retardant liquid under pressure to said liquid conduit;
• means connecting a source of air under pressure to said conduit;
• and
• pressure regulator means connected to regulate the pressure of liquid and air to said nozzles such that an atomized spray of air and fire retardant material is directed to impregnate said webs just ahead of the point where said webs are combined in said combining means and to permeate each of the webs without destroying their web form.