ROTARY DIE CUTTER

摘要

A sheet S is intermittently advanced or alternately advanced and retreated by a pair of feed rollers 23a, 23b in synchronization with rotation of a pair of magnet and anvil rollers 16, 17 so that the pair of magnet and anvil rollers 16, 17 makes two or more revolutions while the sheet S passes through the pair of magnet and anvil rollers 16, 17. The punching of the same pattern is performed by a flexible die 29 at a plurality of areas of the sheet S spaced in a sheet conveying direction.

主权项

1. A rotary die cutter comprising:
a magnet roller; an anvil roller arranged in parallel with and opposite to the magnet roller with a gap therebetween; a single sheet-like flexible die mounted on the magnet roller; a pair of feed rollers spaced from the pair of magnet and anvil rollers; a first drive mechanism rotating the magnet and anvil rollers in such a way that the magnet and anvil rollers are constantly rotated synchronously with each other at an equal circumferential velocity, a second drive mechanism rotating the pair of feed rollers; a controller controlling the first and second drive mechanisms, the magnet and anvil rollers being rotated in a direction to receive a sheet from the pair of feed rollers; and a sensor arranged between the pair of magnet and anvil rollers and the pair of feed rollers to detect the passage of a leading end of the sheet, wherein every time a detection signal is outputted from the sensor, the pair of feed rollers is intermittently rotated in a direction to convey the sheet to the pair of magnet and anvil rollers, or alternately rotated in the direction to convey the sheet to the pair of the magnet and anvil rollers and the reverse direction at a predetermined timing corresponding to a peripheral velocity and a rotational position of the flexible die so that a plurality of areas spaced from each other in the conveying direction on the sheet are punched by the flexible die while the sheet is conveyed between the magnet and anvil rollers by the pair of feed rollers.