Cutoff control system
US4736446A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 29, 1985 |
| Grant date | Apr 5, 1988 |
| Priority date | — |
| Expiry date | Mar 29, 2005 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41F13/60
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A system for controlling an apparatus operating on a moving web, in accordance with a periodic characteristic of the web. Indicia of successive periods of the characteristics are generated and compared to generate control signals to the apparatus. Specifically, a cutoff control system for a web-fed printing press is disclosed wherein the effective position of the cutting apparatus along the web path is varied in accordance with variation in the position of a maximum density change in an individual repetitive image from that of a reference image, or in accordance with a cross-correlation between the individual image and a reference image.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.