| 摘要 |
A slotting device for a linear succession of moving sheets, being part of a creasing and slotting machine, with arcuate knives 10, 11 being mounted separately on a pair of rotating knife gears (9, 8, Fig 3b) each driven independently about a common axis by a pair of gears 15, 14 rotatably mounted on a pair of driveshafts 17, 16 driven by computer-controlled motors. The knives may be accelerated and decelerated independently to assume instantaneous positions relative to each other and to a sheet to be cut, in order to determine the length and spacing of successive cuts. The knives may be mounted on a common axis as illustrated or on separate axes spaced apart along the line of travel of the sheets. |
