Sanitary tissue products which are laminates formed from two dissimilar paper webs. When a web of low density, high bulk process paper is united with a web of conventional paper, a product possessing absorbency softness, flexibility, and bulk properties similar to those of a product comprising two webs...http://www.google.de/patents/US4100017?utm_source=gb-gplus-sharePatent US4100017 - Multi-ply tissue product
