Ink key control system
US4008664A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 24, 1975 |
| Grant date | Feb 22, 1977 |
| Priority date | — |
| Expiry date | Mar 24, 1995 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41F31/045
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
In a printing press, a remote control apparatus for adjusting ink keys to control ink film thickness at various lateral portions of the ink fountain has an inspection table for supporting paper printed with an image by the press and a plurality of switches mounted at the leading edge of the paper on the table. Each switch is aligned with a respective portion of the printed image corresponding to a respective ink key wich can be adjusted by the switch. A display such as a cathode ray tube simultaneously displaying the settings of all of the ink keys is combined with the inspection table and switch arrangement, with the setting of each ink key being displayed in a different horizontal location, arranged in the same horizontal order as the switches that control them. A respective portion of the display image is vertically deflected for each respective key position, with increasing deflection corresponding to increasing ink film thickness, to create an image of the shape of the ink film distribution. Each of the switches is operable from a neutral position to far and near positions to adjust the respective ink key and consequently change the deflection of the respective portion of the …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.