| 摘要 |
<p>Disclosed is a sheet stack manufacturing process. At first, a plurality of band sheets (S) are fed. Each band sheet (S) is folded at least once along a longitudinal direction thereof at a first folding step (10a,10b), to form folded bands (S1,S2,...). Then, each folded band is folded along the longitudinal direction at a second folding step (12a,12b,...) to have at least three fold lines by the first and second folding steps and to sandwich a portion of at least one of an overlying sheet and an underlying sheet thereof, thereby to form a band-shaped sheet stack (13) in which a plurality of sheets (S) are combined with one another so as to be stacked on one another. The band-shaped sheet stack (13) is cut to a predetermined length to be separated into individual sheet stacks (15). <IMAGE></p> |
