Automatically controlling water feedrate on a lithographic press
US4972774A · kind A · utility
17Cited by
5References
4Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 29, 1985 |
| Grant date | Nov 27, 1990 |
| Priority date | — |
| Expiry date | Apr 29, 2005 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S101/45
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
The invention relates to a method for automatically controlling the water feedrate on a lithographic press which includes a blanket cylinder, a plate cylinder, inking rollers and dampening rollers. The temperature of the fountain solution is regulated so as to be constant. The alcohol concentration is regulated so as to be constant. The ink film thickness on one of the inking rollers is sensed to provide a signal proportional to that variable. The sensing of the ink film thickness on the inking roller is used to determine the water feedrate to the plate cylinder and the rate of water feed is dependent upon the ink film thickness.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.