.~ Non-uniform, irregular or configured web or sheet {6}
110
.~.~ Watermarking
DEFINITION
Classification: 162/110
(under subclass 109) Processes including a step or redistributing the fibers in the web or sheet or altering their configuration in a limited area of the web or sheet so as to produce a mark or design in the product which is visible when viewed by transmitted light, and the products of such processes.
(1) Note. The watermark is most frequently produced by a raised or depressed pattern on a dandy roll. In the former case, there is less fiber at the mark than in the balance of the sheet; in the latter case, there is more fiber. In either case, there is a difference in transparency between the area of the mark in the one hand and the balance of the sheet on the other.
