Patent ID: 6475129
Filing Date: 2002-11-05
Classification: B65H

Abstract:
A buckle folding machine, comprising:a plurality of pivot levers; a plurality of folding rollers, each of said folding rollers being mounted on a respective one of said pivot levers, mounted in pairs to define a plurality of folding gaps each having a respective folding gap width; a restoring force mechanism acting on said pivot levers, said pivot levers being pivotable against a restoring force of said restoring force mechanism; electrically controllable adjusting members each for acting on a respective one of said pivot levers to automatically set said folding rollers to different folding gap widths as a function of the measured or calculated thickness of a sheet of paper or stack which is to pass through the respective folding gap, said adjusting members each comprising a plurality of pneumatic working cylinders arranged in series in a cascade-like pattern, each of said working cylinders having a working stroke which mutually add up; and an electronic process computer which calculates the folding gap widths to be set in a particular case according to a preset working program from measured and/or manually entered paper thicknesses or stack thicknesses and actuates said electrically controllable adjusting members to provide a desired folding gap width at the respective folding gaps.