| 摘要 |
A method and apparatus for automatically producing and threading a helix into a perforated stack of sheets to form a notebook, calendar or the like. The apparatus comprises a device for continuously winding a thread or wire into a helix, a device for repeatedly cutting the helix to a desired length and a device for threading the cut-to-length helix into a perforated stack of sheets. According to the invention, the cutting device includes a screw-shaped guide, arranged some distance away from the winding device, for longitudinally guiding the helix which is continuously produced by the winding device. At the end of the guide there is located a recess. A movable tool, a portion of which is arranged to fit into the recess, is provided to cut and thereafter bend over a short length of the thread of the helix. The tool is driven in dependence upon the drive of the winding device so that the helix which is continuously produced is repeatedly cut to a desired length. |
