Either the fibers assembled are of different nature or they are assembled with some other material.
(1) Note. The claimed addition of a binder to a fibrous mass is sufficient to cause placement of a patent elsewhere. This class takes mechanical entanglement of fibers unless otherwise provided for (for example, see felting in Class 28).
SEE OR SEARCH CLASS
2, Apparel,
175.9, for a felt hat and a method of making a felt hat.
366, Agitating, appropriate subclasses for mixing cement with fibers.
