Patent ID: 7775958

Claim:
A facility for manufacturing a sanitary tissue paper product formed of a plurality of interfolded multi-ply webs arranged in a stack, said facility comprising: a ply machine having a primary paper roll supply for providing a pair of moving webs, said ply machine having means for forming an unbonded multi-ply web from said pair of webs, said ply-machine having means for taking up said multi-ply web and storing said multi-ply web in a secondary paper roll; and an interfolder having means for receiving at least one secondary paper roll for providing a plurality of unbonded, multi-ply webs for the sanitary tissue paper product, said interfolder forming a web guide path for said multi-ply webs along which said plurality of multi-ply webs are arranged to be adjacent but not overlapped, said web guide path extending from said secondary paper roll receiving means to an interfolding means for moving said plurality of multi-ply webs from the former to the latter, emboss bonding means interposed along said web guide path upstream of said interfolding means for embossing each of said unbonded, adjacent, multi-ply webs as they move along said web guide path to bond the plies of each web together prior to reaching said interfolding means to form bonded multi-ply webs, said interfolding means interfolding said plurality of bonded multi-ply webs and arranging them in a stack to form the sanitary tissue paper product, said interfolder operating at a web movement speed at which the bonding of said plies of said multi-ply webs by said emboss bonding means is satisfactorily carried out, the operating speed of said interfolder being less than the operating speed of said ply machine.