.~.~ Double faced corrugated sheets or webs connected
DEFINITION
Classification: 428/59
(under subclass 58) Product comprising a plurality of sheets or webs connected to each other and each sheet or web comprising a plurality of hills and valleys extending parallel to each other.
(1) Note. The connection may be through the intermediary of a planar sheet associated with the hills and valleys, or the hills of one sheet may be directly connected to those of the other.
(2) Note. An example of the products found herein is corrugated cardboard.
