| 摘要 |
<p>A device for feeding a continuous web, for cutting it into pieces and having automatic reel change for changing the reels from which the web is unwound is described. This device includes a cyclic cutting device positioned at the confluence of two tracks, along which two continuous webs are unwound from corresponding reels are fed, and controls for controlling the generation of a signal when an associated reel is exhausted; along each of the tracks there are provided a mechanism for feeding the webs from the reels to the cutting device, and such feeding mechanism include, for each track, a pair of feed rollers for feeding the associated web to the cutting device. The main characteristic of this device lies in the fact it includes a pulse generating unit for generating pulses having a phases related to the cutting device and a frequency which is a function of the cutting frequency of the cutting device, and drive means for the pair of rollers constituted by a stepping motor responsive to the pulse generating unit.</p> |
