Method of reducing vertical banding in ink jet printing
US6595621B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 4, 2001 |
| Grant date | Jul 22, 2003 |
| Priority date | — |
| Expiry date | Jun 4, 2021 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J2/2132
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
An ink jet printing process for removing or substantially hiding vertical bands which may be produced during a printing operation includes the application of a controlled variance to shift the horizontal position of certain ink drops fired from certain nozzles. That is, instead of firing ink drops from each of the nozzles simultaneously, the controlled variance causes the ink drops to be fired at various times after the firing signal has been received. The controlled variance may involve a mathematical formula applied to set the level of horizontal shift for each of the ink drops. Examples of suitable mathematical formulae include sinusoidal functions, Bessel functions, and Tschebysheff polynomials.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.