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US 6,440,341 B1Granted
Flame set underlay and process for making same
OwnerCharles S. Mussallem, IIIinventor
Life of this patent
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Abstract
A rug underlay comprising a fiber batting needle-punched to a core thickness of 0.25 to 0.5 inch with one side being flame-treated to produce a surface of matted melted fibers with random stiff spikes of fiber projecting upwardly therefrom; and the other side being coated with a rubber material. The process for making same includes passing the core beneath burners about 4-8 inches therebelow and the burners produce about 20,000 BTU's /hour/foot of burn length measured transversely of the core.
Claims5
A process for making a rug underlay comprising the steps of:
- A. needle-punching a layer of fiber batting from at least an upper surface thereof to form a thin fibrous core having intermingled fibers;
- B. direct flame singeing by a plurality of spaced and aligned burners of said upper surface to melt a top portion of the fibers to produce hardened spikes of said fibers projecting upwardly above a general plane of said upper surface;
- and
- C. coating the lower surface of the core with a layer of cured rubbery material.
1 more element
Dependencies are inferred from the claim text.