Pre-registration system for a printing press
US5771811A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 10, 1996 |
| Grant date | Jun 30, 1998 |
| Priority date | — |
| Expiry date | Oct 10, 2016 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41P2233/13
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A pre-registration system for a printing press may be provided with a first detector for detecting an angular position of a first rotatable printing cylinder by sensing when a reference mark disposed on the first printing cylinder is in a predetermined angular position, a second detector for detecting an angular position of a second printing cylinder by sensing when a reference mark of the second printing cylinder is in a predetermined angular position, and an adjustment mechanism for automatically adjusting the angular position of one of the printing cylinders based on the circumference, a web distance, and the angular position of one of the printing cylinders. The adjustment mechanism may adjust the angular position based upon a stored phase data relating to the web distance and the circumference. Alternatively, the adjustment mechanism may determine a target angular position for the one printing cylinder, determine a phase correction signal based upon the angular position of the one printing cylinder and the target angular position, and adjust the angular position of the printing cylinder based upon the phase correction signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.