Phasing control system for web having variable repeat length portions
US4781317A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 27, 1986 |
| Grant date | Nov 1, 1988 |
| Priority date | — |
| Expiry date | Oct 27, 2006 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T83/159
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A method and apparatus for controlling the phasing of repeat length portions of a moving web to an operating machine along the web including method and apparatus for measuring instantaneous phasing error between web portions being operated on and the operating machine; method and apparatus for measuring repeat length error in web portions upstream of the operating station; method and apparatus for determining the total distance by which a web portion is out of phase with the operating machine before the web portion is operated on by the operating machine, method and apparatus for adjusting the movement of a web portion relative the movement of the operating machine during the last repeat length of web travel of the web portion before it is operated on by the operating machine; and method and apparatus for monitoring and correcting the phasing adjustment response.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.