Non-impact printer with evenness control
US5640190A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 8, 1994 |
| Grant date | Jun 17, 1997 |
| Priority date | — |
| Expiry date | Jun 8, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K15/1247
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A non-impact printer is described for forming an image on a medium. The printer having: PA1 a linear array of recording sources for forming a multi-gradation latent image on a receptor surface, the linear array comprising a plurality of sub-sets of recording sources; PA1 an element for developing the latent image into a visual image; PA1 an element for transferring said visual image onto the medium; PA1 an element for generating and storing first correction factors derived from measurements of the non-uniformity of average energy output of each of the sub-sets of recording sources; PA1 first correction element for applying, for each sub-set of recording sources, the first correction factors; PA1 an element for generating and storing second correction factors derived from measurements of the non-uniformity of each individual one of the recording sources; and PA1 second correction element for applying said second correction factors after applying the first correction factors.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.