.~ Nested bags or folded wall with spaced or unsecured faces
DEFINITION
Classification: 55/380
(under subclass 361) Apparatus wherein the separating member comprises (1) a plurality of permeable bags one within the other, in spaced or face-to-face relationship and in which at least one of said bags is a filter, or (2) a single filter bag folded or foldable in such a manner that the lateral wall thereof is comprised of plural, facially unsecured layers or a chamber is formed between layers.
SEE OR SEARCH THIS CLASS, SUBCLASS:
382, for a filter bag made of two or more folds or layers substantially facially secured to each other so as to form a single separating surface.
