Splice synchronization system
US5437749A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 4, 1993 |
| Grant date | Aug 1, 1995 |
| Priority date | — |
| Expiry date | Oct 4, 2013 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65H2701/1762
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A system for coordinating the splices in each of the component webs used in making a composite corrugated paperboard web independently measures on a dynamic real time basis the length of each component web between the splicer where it is supplied and a downstream cutoff apparatus where the synchronized splices are cut out in a short length of web in which they are contained. The real time measurement of each component web includes continuous monitoring of web lengths subject to change while running through variable length storage areas, and an initialization procedure whereby an initially unknown length of component web in its respective storage is determined. The system also includes a calibration procedure by which the various devices used to measure running web lengths throughout the system are all calibrated to a master device which controls the total web length for each order. Accuracy of the system is further enhanced by independently monitoring the response time of each splicer to its activating control signal and adjusting, as necessary, the timing of the control signal for measured variations in response time.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.