Method and arrangement for computing and regulating the distribution of a linear load in a multi-nip calender and a multi-nip calender
US7017477B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | May 3, 1999 |
| Grant date | Mar 28, 2006 |
| Priority date | — |
| Expiry date | May 3, 2019 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21G1/004
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A method and arrangement for computing and regulating distribution of linear load in a multi-nip calender. A material web is passed through the nips in a set of rolls including a variable-crown upper roll, a variable-crown lower roll and intermediate rolls positioned between the upper and lower rolls. The rolls in the set of rolls are supported so that, when the nips are closed, the bending lines of the rolls are curved downwards. When computing and regulating the linear loads, one or more of the physical properties affecting the bending of each intermediate roll under load, such as bending rigidity, mass, shape, and material properties, are taken into account. The ratio of the linear loads applied to the intermediate rolls, the weight of the rolls per se, and/or the support forces applied to the rolls are regulated so that the set of rolls is in a state of equilibrium and a predetermined state of deflection.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.