Electronic device for determining a register error in multi-color printing machines
US4856903A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 17, 1987 |
| Grant date | Aug 15, 1989 |
| Priority date | — |
| Expiry date | Apr 17, 2007 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41F33/0081
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
Device for determining a register error between individual colors in multicolor printing machine, comprising a photoelectric scanning apparatus for scanning differently colored register marks printed together on a printed sheet, an evaluation apparatus interacting with the scanning apparatus for determining the relative positions of the individual register marks, the scanning apparatus being disposed in a housing to be positioned at a given measuring location on the stationary printed sheet, the scanning apparatus comprising a scanning head movably disposed in the housing, and drive a device provided in the housing for producing the scanning movement of the scanning head relative to the printed sheet within a relatively small scanning region.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.