Method for controlling a chill roll system
US6606948B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 11, 2002 |
| Grant date | Aug 19, 2003 |
| Priority date | — |
| Expiry date | Mar 11, 2022 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF26B13/183
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A method for controlling a chill roll system in a web printing press includes calculating, based on a web inlet temperature of a web entering a first chill roll of the chill roll system, a dew point temperature of an ink solvent vapor of ink printed on the web is calculated. The inlet coolant temperature of coolant entering the first chill roll is set to temperature value near the calculated dew point temperature. Using a heat transfer model, the flow rate of the coolant through the first chill roll needed to maintain a temperature rise of the coolant through the first chill roll below a predetermined value is determined. The method prevents post-chill marking by sufficiently cooling the web, and sets chill roll temperature profiles to avoid solvent condensation on chill roll surfaces and thereby avoid condensate marking.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.