Apparatus for adjusting pull rollers and/or cutting knives in folders
View Patent ↗An apparatus for adjusting pressure rollers and/or cutting knives includes driven pull rollers or driven pull and knife rollers extending over the web width arranged opposite the pressure rollers and/or cutting knives and at least two threaded spindles, which are used to axially adjust the pressure rollers and/or the cutting knives simultaneously or immediately one after another. During the axial adjustment, some of the pressure rollers and/or the cutting knives remain stationary, some of the pressure rollers and/or cutting knives are adjusted by a first adjustment travel and/or some of the pressure rollers and/or cutting knives being adjusted by a second adjustment travel.
1. An apparatus for processing printing material webs with variable web widths, the apparatus being one of a folding assembly, a turning assembly, and a web guide and comprising:
web contacting elements including at least one of rollers and cutting knives, each of which is settable on one side of the printing material web;
driven pull rollers or driven pull rollers and knife rolls extending over the web width and arranged opposite said web contacting elements;
at least one threaded spindle operatively connected for adjusting axial positions of said web contacting elements simultaneously or in succession, wherein a first portion of said web contacting elements are adjusted by a first adjustment travel and a second portion of said web contacting elements are adjusted by a second adjustment travel different than said first adjustment travel, wherein said at least one threaded spindle is divided into regions, wherein each of said regions is assigned to individual ones of said web contacting elements and said regions are configured with pitches (P) of different pitch height and pitch direction, the pitch height and pitch direction being configured in accordance with the adjustment travel of said individual web contacting elements.
2. The apparatus of claim 1 , wherein said first adjustment travel is zero such that said first portion of said web contacting elements are stationary.
3. The apparatus of claim 2 , wherein a third portion of said web contacting elements are adjusted by a third adjustment travel that is greater than zero and different from said second adjustment travel.
4. The apparatus of claim 1 , wherein each of said first adjustment travel and said second adjustment travel is non zero.
5. The apparatus of claim 1 , wherein the apparatus is a folding assembly and the web contacting elements are in a folding former plane of the folding assembly.
6. The apparatus of claim 1 , wherein said web contacting elements comprise pressure rollers and cutting knives and said at least one threaded spindle comprises at least two threaded spindles, said pressure rollers being axially adjustable by at least one of said at least two threaded spindles and said cutting knives being axially adjustable by a further one of said at least two threaded spindles.
7. The apparatus of claim 1 , wherein said at least one threaded spindle symmetric about a center line of said apparatus.
8. The apparatus of claim 1 , further comprising a single drive for driving said at least one threaded spindle.
9. The apparatus of claim 1 , further comprising at least one position monitoring device for determining the axial position of all web contacting elements.
10. An apparatus for processing printing material webs with variable web widths, the apparatus being one of a folding assembly, a turning assembly, and a web guide and comprising:
web contacting elements including at least one of rollers and cutting knives, each of which is settable on one side of the printing material web;
driven pull rollers or driven pull rollers and knife rolls extending over the web width and arranged opposite said web contacting elements;
at least one threaded spindle operatively connected for adjusting axial positions of said web contacting elements simultaneously or in succession, wherein a first portion of said web contacting elements are adjusted by a first adjustment travel and a second portion of said web contacting elements are adjusted by a second adjustment travel different than said first adjustment travel, wherein a separate threaded spindle is provided for each of the first and second adjustment travels, said apparatus further comprising a drive with gear mechanisms with a defined transmission ratio with respect to rotational speed and direction of rotation for driving said threaded spindles.
11. The apparatus of claim 10 , wherein said at least one threaded spindle is symmetric about a center line of said apparatus.
12. The apparatus of claim 11 , wherein said drive is a stepping motor.
13. The apparatus of claim 10 , wherein said first adjustment travel is zero such that said first portion of said web contacting elements are stationary.
14. The apparatus of claim 13 , wherein a third portion of said web contacting elements are adjusted by a third adjustment travel that is greater than zero and different from said second adjustment travel.
15. The apparatus of claim 10 , wherein each of said first adjustment travel and said second adjustment travel is non zero.
16. The apparatus of claim 10 , wherein the apparatus is a folding assembly and the web contacting elements are in a folding former plane of the folding assembly.
17. The apparatus of claim 10 , further comprising a single drive for driving said at least one threaded spindle.
18. The apparatus of claim 10 , further comprising at least one position monitoring device for determining the axial position of all web contacting elements.