Image-forming device having a patterned roller and a method for providing traceability of printed documents
US6801723B2 · kind B2 · utility
4Cited by
5References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 2, 2002 |
| Grant date | Oct 5, 2004 |
| Priority date | — |
| Expiry date | Jan 3, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G15/6582
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A method and apparatus for an image-forming device having at least one patterned roller for affecting the amount of toner present on a print medium when the print medium is advanced through a paper path of the image-forming device and contacts the at least one patterned roller. The roller includes a purposeful pattern that is formed in an outer surface of the roller. The purposeful pattern is configured to form an identifying mark on a print medium as a result of the amount of toner present on the print medium.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.