Method of controlling bulk in folded webs.

摘要

A method of controlling stack back pressure in folding apparatus incorporating sensing the bulk of a stack (21) issuing from folding rolls, (10) forming a signal (22) corresponding to the sensed bulk, comparing (23) the signal with a predetermined signal range and changing the size of an embossing nip gap (13; 14, 15) or pressure whenever the signal is outside of the range. <IMAGE>