Inking system for printing machines
US3956986A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Dec 4, 1974 |
| Grant date | May 18, 1976 |
| Priority date | — |
| Expiry date | Dec 4, 1994 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/0777
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
An inking system for applying ink to a printing plate which includes a fountain roller and a series of ink feed rollers with at least one vibrated roller or drum. Means are provided for automatically regulating the temperature of the fountain roller thereby to maintain constant the amount of ink fed over a long press run for maintenance of a predetermined full tone density. Means are also provided for automatically regulating the temperature of the vibrated roller thereby to maintain constant the printing contrast in the half tone portions of the plate. The temperature regulating means includes both a source of heat and a source of cold, making it possible to either warm or cool the rollers thereby permitting automatic operation over a wide range of conditions including a wide variation in the ambient temperature. In the preferred embodiment the temperature of the rollers is maintained by circulating a fluid such as water through the rollers from a reservoir of fluid at a controlled rate and temperature. Means are additionally provided for applying to the rollers a "shot" of fluid which is selectively either hot or cold to bring the rollers rapidly to desired temperature prior to t…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.