Method of generating void pantographs
US9087288B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 27, 2013 |
| Grant date | Jul 21, 2015 |
| Priority date | — |
| Expiry date | Mar 27, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/00883
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method of generating a large number of different void pantographs quickly and easily enables selecting a void pantograph that works best with a particular copy machine make and model. The background patterns are generated by varying the size of the dots and placement of the dots on an X-Y grid. The foreground pattern is generated by varying the size of the dots and placement of the dots on an X-Y grid. The foreground and background patterns may be generated by combining two separate patterns. A foreground pattern is combined with multiple background patterns to produce the different void pantographs. A full page of void pantographs having a similar density is tested on a copy machine to determine which one works the best.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.