Continuous web registration
US4945252A · kind A · utility
63Cited by
28References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 29, 1989 |
| Grant date | Jul 31, 1990 |
| Priority date | — |
| Expiry date | Nov 29, 2009 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65B41/18
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A web structure with electromagnetic radiation shifting indicia is disclosed. The indicia provide signals used in controlling various processes to be performed on the web as well as for controlling movement of the web. The preferred indicia are normally essentially invisible so that the physical appearance of the web is not affected. The indicia emit wave-shifted electromagnetic radiation in response to incident radiation of a given range to provide a means for determining the positioning of the web during movement as the processes are performed. Process and apparatus for making and using such webs are also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.