| 摘要 |
<p>A device for folding sheets in superposed layers comprises a frame (2), a pair of first rollers (5, 6) for feeding a sheet to be folded and mounted on the frame (2), a contact surface (11), a pair of second, folding rollers (8, 9) interposed between the pair of first rollers (5, 6) and the contact surface (11), the pair of second rollers (8, 9) being movable with reciprocating motion to form in the sheet a succession of superposed layers.</p> |
