Method and apparatus for controlling web handling machinery
US4719575A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 14, 1984 |
| Grant date | Jan 12, 1988 |
| Priority date | — |
| Expiry date | Sep 14, 2004 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB26D5/32
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A control system and method for acquiring and automatically maintaining a register condition for successive repeat lengths of a moving web relative to a cut-off apparatus or the like in a web operating apparatus of the type which includes an adjusting means for adjusting the web. The system operates in manual and automatic mode, and while in the manual mode an image profile of the web is digitized, stored and processed to locate at least one suitable control mark. After the register condition is obtained and at least one control mark indentified during the manual mode, the system can be switched to automatic mode to automatically maintain the registration condition using at least one control mark to detect deviation from the register of the web.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.