Folding roller for paper converting machine
An interfolding machine, having first and second folding counter rotating rollers, a substantially cylindrical body and a plurality of folding means for engaging at a contact line ( 15 ) for making a stack of folded and/or interfolded sheets in a folding area. Each folding roller ( 1 ) is held by at least one support ( 10 ) arranged substantially opposite to the contact line in order to not impede folding operations in the folding area. Between the support and the folding roller, a bearing ( 20 ) is mounted that allows free rotation. The support holds the folding roller at an angular portion circumferentially unoccupied by folding elements or mechanical clamps and inclined at an angle with respect to a plane containing the axes of the two rollers. The support does not interfere with the adjusting operation of the folding roller and allows processing of the sheet or web of paper without interrupting continuity.
1. A pair of counter rotating folding rollers for use in machines for converting paper or similar products, each of said pair of counter rotating folding rollers comprising at least one substantially cylindrical body having longitudinal axis and a plurality of folding means, wherein said pair of folding rollers interact at a contact line to produce a stack of folded and/or interfolded sheets downstream from said contact line characterised in that at least one support spaced from said contact line and extending transversely from the longitudinal axis is provided for each of said pair of folding rollers in order not to impede folding operations in said folding area and wherein each of said pair of counter rotating folding rollers further comprises a gap for contacting said at least one support wherein said gap is located at the end of or between said plurality of folding means.
2. The pair of counter rotating folding rollers according to claim 1 , wherein between said at least one support and said supported folding roller a bearing is provided suitable for allowing a free rotation of said supported folding roller with respect to said at least one support.
3. The pair of counter rotating folding rollers according to claim 1 , wherein said each of said pair of counter rotating folding rollers comprises at least a first and a second cylindrical body wherein one end of each of said first and second cylindrical bodies are coaxial to each other and operatively connected to each other along the cylindrical axes of said first and second cylindrical bodies so that they can rotate integrally.
4. The pair of counter rotating folding rollers according to claim 3 , wherein at least one of said at least one support for each of said pair of folding rollers further comprises a relative bearing arranged to contact said folding roller at said operatively connected ends.