Image forming method using registration marks having varying angles
US6317147A · kind A · utility
59Cited by
6References
18Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 13, 2000 |
| Grant date | Nov 13, 2001 |
| Priority date | — |
| Expiry date | Jun 13, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G2215/0161
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An image forming method having a color alignment system in which a registration mark is printed in each color. Each registration mark has a first line segment extending in a first direction and a second line segment extending from a first end of the first line segment at a predetermined angle with the first direction. The predetermined angles vary among the marks printed. This prevents a complete overlap of two or more marks, thus allowing for sensing and distinguishing of each mark from the others.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.