Method and an arrangement for the detection by photoelectric means of markings made on a travelling material web provided with printed decoration
US4698514A · kind A · utility
12Cited by
6References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 6, 1984 |
| Grant date | Oct 6, 1987 |
| Priority date | — |
| Expiry date | Jul 6, 2004 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K2019/06253
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method and an arrangement is disclosed for the detection by photoelectric means of markings made on a printed, decorated material web. The markings comprise two groups of stroke markings, the markings of a first group being arranged to be sensed by a first photocell element, which, on sensing the first group markings causes the output of a second photocell element, which senses the stroke markings of a second group of making to be fed into a memory unit for continuous comparison with a stored value. In response to the comparison, a control signal is generated to control the performance of various operations on the web.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.