Ink fountain key adjuster using correction values based on printing conditions and sheet block size
US6536341B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 28, 2001 |
| Grant date | Mar 25, 2003 |
| Priority date | — |
| Expiry date | May 28, 2021 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41F31/04
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
An apparatus for controlling ink supply by varying the opening degree of an ink fountain key according to a measured density of a printed matter includes a control means for determining a reference correction value of the opening degree of the ink fountain key according to a density difference between a target density of the printed matter or a reference density and a measured density, and determining a correction value by multiplying the reference correction value by a coefficient having a value of more than 1. The control means controls the ink fountain key according to the correction value of the opening degree of the ink fountain key until the number of sheets printed from the start of the printing exceeds a predetermined number, and controls the ink fountain key according to the reference correction value after the number of sheets printed exceeds the predetermined number.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.