(under subclass 296) Method or apparatus wherein the nonwoven web is formed (a) by sequential deposition of layers of similar fibers in such a manner that a line of demarcation is presented between the deposited layers; (b) by deposition of diverse fibers in such a manner as to form distinguishable layers; or (c) by superimposition of a plurality of preformed web.
(1) Note. Nonwoven web formation by a plurality of adjacent, oppositely disposed condensers supplied from a single supply source wherein the fibers collected thereon are combined or merged into a single, coherent web at the nip there-between, as double condenser cylinder machines, for example, is excluded from this subclass. However, combining of nonwoven unitary webs emerging from the nips of a plurality of such multiple condensers is provided for herein.
SEE OR SEARCH CLASS
162, Paper Making and Fiber Liberation,
123+, for processes for producing multilayer water laid
fibrous webs or sheets; and subclasses 298+ for apparatus for application of plural separate fiber streams to a foraminous forming surface.
264, Plastic and Nonmetalic Article Shaping or Treating: Processes,
112+, for forming stratified or layered nonwoven webs by uniting randomly associated fibers as provided by this class (264). 425, Plastic Article or Earthenware Shaping or Treating: Apparatus,
81.1, for air felting type shaping means for forming stratified products combined with an operation of this class (425).
